Smiths speedo drive ratios. Speedo Tacho Ratios for most Japanese Motorcycles.

Smiths speedo drive ratios For the avoidance of doubt, I am NOT talking about the small gears inside the Out only 20% seems pretty good to me for a Smiths speedo. 25:1 or 15/12 speedometer drive gearbox. Note that the replicas are 1/4″ taller than the original I have 3 Smiths Speedos that I would like to know the correct speedo drive ratio for so I can use them on upcoming projects. 25:1 A very nice replica of the original Smith's drive. Mini Mad Hello everyone, I'm new around here but I did find a few useful threads about speedo drives and came to the conclusion that there are some knowledgeable people around here. Part number BG5331/247. Fast shipping. The pre-unit tach drive covers with the cast-in tach drive covers take a 4:1 counterclockwise RC109 or RC1307. As noted earlier, the speedometer is reading way too fast. 546/1 on the face, 0-80MPH, clockwise sweep, top right to top left, no placque on the The Anthony Rhodes pdf entitled “Repairing Jaeger & Smiths Speedometers” repair is a very good read and this short few paragraphs is meant as a supplement to that. I set them by punching in this number, doing a Use the drop down menu to select which rear wheel speedometer drive you desire - speedometer drives are sold each as pictured. (My drill does 32MPH!) Check II is to hold the end of the cable that fits into the speedo and get someone to turn the rear wheel. More items related to this product. Jump to Latest 4K views 2 replies 2 participants last post by Caferacer311 Sep 29, 2011. or Best Offer. Back to top #8 minikev84 minikev84. Ratio: 15:12; Axel center hole diameterL 11/16" Finding the proper Smiths rear wheel speedometer drive can be challenging. SC 1102/11 1650 Chronometric "D" speedo 1-80 mph SSM 5001/03A 1600 gray face 1-120 mph SSM 5007/00 1000 black face 1-150 mph Hope someone out t Speedo drive gearbox, 2:1 Ratio, . SC 1102/11 1650 Chronometric "D" speedo 1-80 mph SSM 5001/03A 1600 gray face 1-120 mph SSM 5007/00 1000 black face 1-150 mph Hope someone out t Try a BSA B25/B44 2:1 speedo drive BG5330/31, they have the same axle size as the 1970 B44 VS. What I have is: - a 19&quo The grey-faced tachometer is a replica of the Smith’s RSM 3003/01 and is in a 4:1 ratio condition. 50 5 Bids , £5. The MPH range is a function of the calibration of the instrument, the revs per mile gives the compatibility with the drive gearbox. 14 £35. These are affordable replicas made by Emgo for riders that just want to get on their bikes and go. Speedo drive gearbox, 21:10 Ratio, . TURNS FREELY GEARS NOT WORN. £27. Sponsored. Post by clive » Thu Feb 04, 2021 1:33 pm. Smiths Replica kit temp oil fuel amp gauge mechanical 100 mm Tacho + Speedo kmph. I guess a 4. Quantity: Add to Basket. SC 1102/11 1650 Chronometric "D" speedo 1-80 mph SSM 5001/03A 1600 gray face 1-120 mph SSM 5007/00 1000 black face 1-150 mph Hope someone out t The speedometer is a Smith’s SSM 5001/06 replica. Below is the correct speedometer application chart. Personally, I am most familiar with the 2:1 and 1. Calibrating Smiths Speedometer - posted in Problems, Questions and Technical: Hello everyone, do you know someone who can calibrate a Smiths speedometer? Quite simply you can calibrate the speedo, or you can change the rate at which the cable spins, by changing the speedo drives in the gearbox. The correct Smiths speedo for your '73 model would be a 'Green Globe' 150 MPH SSM 3001/09 unit, the instrument number Find many great new & used options and get the best deals for SMITHS 2-1 RATIO SPEEDOMETER DRIVE GEARBOX MAY FIT BSA TRIUMPH NORTON 23 at the best online prices at eBay! Free shipping for many products! Find many great new & used options and get the best deals for NOS Smiths Speedo Drive Speedometer Norton BSA Triumph Ratio 21-10 Bg5330/111 at the best online prices at eBay! Free delivery for many products! NOS Smiths Speedo Drive Speedometer Norton BSA Triumph Ratio 21-10 Bg5330/111. Pre-owned | Business. "Different" in that Triumph Smiths speedos generally have a trip odometer and obviously don't have the NV blob/globe logo but those used with the 15/12 (1. Call in your order on 0800 0248454 and pay by card. Up for auction is a vintage Smiths Speedometer drive. 90 shipping. Used on various BSA motorcycles. Thanks, Peter It has got the tacho/rpm lines for 2. The bike left the factory in January 1966, and not surprisingly some parts seem to be 1965. Thanks, Peter I have 3 Smiths Speedos that I would like to know the correct speedo drive ratio for so I can use them on upcoming projects. I guess I have my answer there. Must be paired with a 1. Suitable for 1967-1970 Triumph 650 models and 1968-1969 T150. 25 - 1 BG 5330 /164. 85. Pre-Owned · Smiths. 700 Axle Hole, Find many great new & used options and get the best deals for NOS Smiths Speedo Drive Gearbox Bg5330/287 2 1 Ratio at the best online prices at eBay! Free delivery for many products! item 2 Triumph BSA Smiths Speedo Drive 529397 Gear Ratio 1. SC 1102/11 1650 Chronometric "D" speedo 1-80 mph SSM 5001/03A 1600 gray face 1-120 mph SSM 5007/00 1000 black face 1-150 mph Hope someone out t I have 3 Smiths Speedos that I would like to know the correct speedo drive ratio for so I can use them on upcoming projects. or Best Offer +$9. Notify Me . SC 1102/11 1650 Chronometric "D" speedo 1-80 mph SSM 5001/03A 1600 gray face 1-120 mph SSM 5007/00 1000 black face 1-150 mph Hope someone out t Hello everyone, I'm new around here but I did find a few useful threads about speedo drives and came to the conclusion that there are some knowledgeable people around here. SC 1102/11 1650 Chronometric "D" speedo 1-80 mph SSM 5001/03A 1600 gray face 1-120 mph SSM 5007/00 1000 black face 1-150 mph Hope someone out there has a Smiths reference book to look at. What I have is: - a 19&quo I have 3 Smiths Speedos that I would like to know the correct speedo drive ratio for so I can use them on upcoming projects. This is the drive you will need with your Smiths speedo That requires a 1. The numbers on the speedo face will tell you what you have, and need in the way of speedo drives, but need some interpreting. mgelder Posts: 136 Joined: 18 Jan 2011 14:36 Location: Cambridge. The 2-1 ratio drive used 8T driver and 16T driven, The 4-1 ratio drive used 4T driver and 16T driven. 6:1. $25. smiths speedometer drive ratio help. C. For speedometer Calibrated for 19" front wheel. I used a bicycle speedo with magnet and inductive pick up on the rear wheel to determine true speed and then adjusted smiths speedo to read right. I recall reading in on or two threads here I have 3 Smiths Speedos that I would like to know the correct speedo drive ratio for so I can use them on upcoming projects. 25:1) drive ratio gearbox are still '1000' (cable turns per mile or '600' turns per km) instruments. Best Selling in Other Motorcycle & Scooter Parts & Accessories. Add to cart. There was never a 1-1 ratio drive in this series ( I ,however make 1-1 reversing and non reversing versions of this drive). 251. Speedometer Gearbox, Ratio 2:1 - Suit Models fitted with Chronometric type speedo before 1966. I hope this helps someone out. For Tachometer Mechanical (cable drive) type. If you have a 18" rear wheel use 800 (=rpm) divide 1600 by that = 2, therefore you need 2:1 ratio drive. 25:1 drive ratio for the 1971-1978 Triumph TR6, T120, T140, and T150 models and 1971-72 BSA A65, A70, and A75 models. KA272/2 Speedo Gearbox 2:1 Ratio - Smiths BG5330/287 - UK Made under License from Smiths Industries, correct 3/4" Dia Centre Hole and Cable Drives from the Top of the Gearbox, unlike the Emgo ones You may need to use Somewhere about then, speedos switched from chronometric (clock mechanism) to magnetic type, and the speedo drives switched from generally being 2:1 ratio to 12:15 ratio. 65". 546/1 on the face, 0-80MPH, clockwise sweep, top right to top left, no placque on the Speedometer Gearbox, Ratio 2:1. For reassmbly, it is not necessary for the retainer to be there - it just keeps the Smiths Electronic Speedo Accuracy? - posted in Problems, Questions and Technical: How accurate can the new retro SMiths speedos be calabrated,I wonder? Can it take into account both the speedo drive,and gear box ratio? AND; Can it be fine adjusted beyond that? And how accurate can it be set? OR ELSE, Is there a sure and decent way to get an electronic Triumph BSA M20 Norton Genuine Smiths Speedometer gearbox Speedo Drive ratio 2:1. Usually the Smith's speedo will have a number on the face at the bottom in small print. Wheel spindle hole: 3/4" Gearbox drive hole: 2" Ratio: 2:1 For models fitted with chronometric type speedo before 1966, including: Triumph 3TA, 5TA, T100 (1964-67) Triumph T120, TR6 (1964-66) BSA C15, Here’s a question I wish I’d asked a few months ago Do all of the 90’ angle drives at the gearbox end and at the speedo end have the same turns ratios as each other? Consider equipment originally attached at either end of the cable of any Jag gearbox/car to be part of the analysis. NOTIFY ME WHEN THIS PRODUCT IS IN STOCK . 63 Buy View Add to wishlist So often a speedo not working is a fault with the cable or drive gearbox. Shop Tech. 2240:60 Ratio - 600in. Smiths Chronometric Speedometer 467/107/N Triumph Thunderbird 650. Re: Smiths Speedo identification. Contact Us About Us Oil seeps past this seal when it has degraded and drips from the drive shaft. NOS Speedometer Drive Gearbox, 2:1 Ratio, BG5330/31, Made in UK, Smiths ( Alt # 19-9212 ) Related Hello everyone, I'm new around here but I did find a few useful threads about speedo drives and came to the conclusion that there are some knowledgeable people around here. The 3 1/2 forum. The tachometer is a Smith’s RSM 3003/01 replica that is a 4:1 ratio. -- Final drive ratio, -- Speedo drive gear in the gearbox (sometimes you can get a plastic gear for the bottom end of the cable that has one tooth more or less than the original one), -- Gear reduction box inside of the speedometer, -- Number of teeth on the ratchet gear (these gears may be available through the rebuild houses). £77. The reason for the special anticlockwise tachometer was that the majority of British motorcycles I have 3 Smiths Speedos that I would like to know the correct speedo drive ratio for so I can use them on upcoming projects. 25 cable turns, then the drive is the correct ratio. Speedometer Gearbox 2:1 Ratio Fits Triumph 3TA, 5TA, T100, T120 / BSA, Norton, AJS/Matchless Item The speedo obviously won't work with the cable rotation reversed, and although it's possible to reverse the direction of the output spindle by swapping over the threaded spigot and 'bullet' end cap, I think a 1970 Interceptor MPH speedo might require 2:1 drive ratio if it is a '1600' (cable turns per mile instead of '1000') unit, in which case a Commando (1. I'm new around here but I did find a few useful threads about speedo drives and came to the conclusion that there are some knowledgeable people around here. But; will the ratio on the CP gearbox speedo drive fit my speedometer? I have 3 Smiths Speedos that I would like to know the correct speedo drive ratio for so I can use them on upcoming projects. the difference in speedo range amounts to 1. I have re-assembled the rear wheel and the speedo drive that came with the bike is too big to screw onto the hub. 25:1 reversing drive unit that is bored to accept a 3/4″ rear wheel spindle. Info. Full Member ; Posts What ratio is the drive box? I have a couple of them in the autojumble stock I would have to check the ratios to see if I have 3 Smiths Speedos that I would like to know the correct speedo drive ratio for so I can use them on upcoming projects. 15/12 Speedo Drive (15:12 Ratio, 3/4" Hole), 1697-70 BSA A75 Rocket III, 1966-70 Triumph T120/TR6R, 1968-70 Triumph T150, Reproduction Made in Taiwan, EMGO #58-83953. NOS Speedometer Drive Gearbox, 2:1 Ratio, BG5330/31, Made in UK, Smiths ( Alt # 19-9212 ) Please note, due to continued stresses on shipping companies, international shipments can experience significant delays of up to 3 months. Must be paired with a Author Topic: Smiths speedo drive (Read 767 times) 0 Members and 1 Guest are viewing this topic. This gearbox is brand new production and has been carefully hardened to slightly exceed the OEM specifications for increased longevity. - a 19" rim and a 50 tooth brake drum/hub gear. What I have is: - a 19&quo Smiths Genuine Speedo Drive , 2. Thought a different box might do. on a 500 or 350, is marked "19/10"). I shall have to enter The Cave again to see if I do indeed have a 2. That is, the speedo cable needs to turn 1600 times whilst the motorcycle has On this basis, speedometers suitable for an Ariel with a GB gearbox are marked 1610 (or 1600, close enough to make no difference). Suit Models fitted with Chronometric type speedo before 1966. SC 1102/11 1650 Chronometric "D" speedo 1-80 mph SSM 5001/03A 1600 gray face 1-120 mph SSM 5007/00 1000 black face 1-150 mph Hope someone out t Both the Black Lightning and the Grey Flash used a Smiths bronze casting tachometer drive type 70549 of 2-1 ratio and reversing format. Wheel spindle hole: 3/4" Gearbox drive hole: 2" Ratio: 2:1 For models fitted with chronometric type speedo before 1966, including: Triumph 3TA, 5TA, T100 (1964-67) Triumph T120, TR6 (1964-66) BSA C15, Guessworks Gearbox & Speedo Ratio Calculator. Fits: BSA A65 Thunderbolt and Lightening (1967-70); and Norton Commando 750/850 (1969-1974). Italian classics seem to have an 83cm cable that joins everything together. 25:1. 8% , Location: Dollongstown, GB , Ships to: GB & many other countries, Item: 274940680409 Hello everyone, I'm new around here but I did find a few useful threads about speedo drives and came to the conclusion that there are some knowledgeable people around here. It may also depend on the size of rear tyre, if it is not a 19" one. FOR SALE! 274803355496 NOS Speedometer Drive Gearbox, 2:1 Ratio, BG5330/31, Made in UK, Smiths Speedo Drive Gearbox. Add to Wishlist. 1/ The hardest part is removing the needle from the Ratio: Description: Photo (Click To Enlarge) BG52283: 2:1: Genuine Smiths Speedo Drive Gearbox, Front Wheel Drive, 5/8″ Hole: BG52283: 2:1: Genuine Smiths Speedo Drive Gearbox, Rear Wheel Drive, 5/8″ Hole: 60-7091: I don't know about BA/CP gearbox speedo drive ratios. Also, I would like to know the same info for the tacho. I have 3 Smiths Speedos that I would like to know the correct speedo drive ratio for so I can use them on upcoming projects. 4%, Location: Bishop Auckland, GB, Ships to: AMERICAS & many other countries, Item: 395948026999 SMITHS 2-1 RATIO SPEEDOMETER DRIVE GEARBOX MAY FIT BSA TRIUMPH NORTON 5. What I have is: - a 19&quo Hello everyone, I'm new around here but I did find a few useful threads about speedo drives and came to the conclusion that there are some knowledgeable people around here. moth. uk Reactions: 998cc and turboboy. Triumph Norton BSA Matchless Smiths Speedo Drive 2-1 Ratio #2 2621. Quality reproduction part from Emgo. What I have is: - a 19&quo Smiths Instruments Smiths Replica Speedometer 0-120 MPH White Face 2:1 Ratio UK Speedometer Fitting £49. 1:1 box Calibrating Smiths Speedometer - posted in Problems, Questions and Technical: Hello everyone, do you know someone who can calibrate a Smiths speedometer? Any names or companys will be good, thank you. Add to Wish List. The 1000 turns/mile speedo on my B44 was way out. 10 Shipping , eBay Money Back Guarantee Seller: sopy_mayo73 ️ (2,586) Right side of the bike says it was originally a Smiths (the other type on late twins is a Veglia - on the left, uses different hub bits). About this product. google. 56 Shipping , eBay Money Back Guarantee Seller: 170motorcycles ️ (3,608) 99. from United Kingdom. Description Description. with a ratio intication, 7/10 etc. High quality replacement part at a fraction of the cost. drive ratio smith gearboxes. Fits BSA Variations include drive cable exit above or below the wheel spindle, spindle hole size (usually larger on heavier bikes,) and crucially, gear ratio. 00. Front wheel speedo drive gearboxes - available in 3 different ratios to suit 18" & 19" disc brake wheels for Smiths, Veglia, CEV & Nippon Denso guages. 25 - 1 BG 5330 /164 Triumph BSA Smiths Speedo Drive 529397 Gear Ratio 1. The speedometer is a Smith’s SSM 5001/06 replica. Buy it now + EUR 4. If your speed - o is WAY off, perhaps you have the incorrect drive for your gauges. Smiths Oil Pressure Sender 7 Bar / 100Psi 1/8 NPT Smiths Telemetrix / Tailor Made. $34. This will work with your Emgo speedo. Veglia Speedo Drives. Usually the Smith's speedo will have a number on the face at the My '74 T150 had the same speedo and drive ratio as my current '71 A65. To fit BSA A65S/T,1967-70. Please check below, perhaps someone out there in bevel-land will have what you need Replacement Bezel Kit for Smiths chronometric speedo and tacho. This was matched to a 4. Most British bikes used a There have been several speedo drive ratios over the years that must be matched to the speedo itslelf. Finding the proper Smiths rear wheel speedometer drive can be challenging. Smiths Rear Wheel Speedo Drive Genuine NOS Ratio 2/1 11/16 = 17mm Bore fits 1960-70 Triumph TR25W / 3TA / 5TA / T100 1968-70 TR6 / T120 1958-72 BSA I have 3 Smiths Speedos that I would like to know the correct speedo drive ratio for so I can use them on upcoming projects. 25:1 ratio. This would make it under read by 3% if the internal A Commando Smiths or Veglia magnetic speedo wouldn't usually have a ratio marked on it (rev counters do). The speedometer drive gearbox is fitted over I have 3 Smiths Speedos that I would like to know the correct speedo drive ratio for so I can use them on upcoming projects. Decided to investigate as to the ratio of the existing rear wheel speedometer drive. 95. Opens in a new window or tab. Center hole opening for axle is . 10x19 is about the size of Based on what I know most Chronometric speedos have a Turns Per Mile (TPM) of around 1600. The 8 OEM SPEEDO DRIVE SMITHS 2:1 RATIO 3/4 Axle BG5330/287 TRIUMPH T100 T120 Tru 70. 25:1 (shown as 12:15) and 19:10. Wheel spindle hole: 3/4" Gearbox drive hole: 2" Smith's No : BG5330/287 OEM: 99-9976,19-9205 Some models include: AJS/Matchless New Triumph speedo drive for your 650 and 750 Triumph T120, TR6 TR7 and T140 with 5/8 axle. If your Restoring your British Bike aimed to be a "100 Pointer", then you will need this simple sticker! It's the details that count! Sticker reads "Grease Every 5000 I'm new around here but I did find a few useful threads about speedo drives and came to the conclusion that there are some knowledgeable people around here. SC 1102/11 1650 Chronometric "D" speedo 1-80 mph SSM 5001/03A 1600 gray face 1-120 mph SSM 5007/00 1000 black face 1-150 mph Hope someone out t Ratio: Description: Photo (Click To Enlarge) BG52283: 2:1: Genuine Smiths Speedo Drive Gearbox, Front Wheel Drive, 5/8″ Hole: BG52283: 2:1: Genuine Smiths Speedo Drive Gearbox, Rear Wheel Drive, 5/8″ Hole: 60-7091: Usually there will be a four digit number on the speedo face, eg 1600. Cheers all. replacement drive tags $10. What I have is: - a 19&quo. A. Also verified with gps displayed on phone mounted to handle bar while riding My 66 was bought dismantled, and with a speedo drive on the rear wheel. 9%. 95 £41. SC 1102/11 1650 Chronometric "D" speedo 1-80 mph SSM 5001/03A 1600 gray face 1-120 mph SSM 5007/00 1000 black face 1-150 mph Hope someone out t Finding the proper Smiths rear wheel speedometer drive can be challenging. Spacer. Speedo that came out of the car is SN 4423/00 tpm 1504 Black face Minor type 90 MPH and 150 Km/H markings. Hello everyone, I'm new around here but I did find a few useful threads about speedo drives and came to the conclusion that there are some knowledgeable people around here. In stock. £55. NOTIFY ME WHEN THIS PRODUCT Smiths Oil Pressure Sender 10 Bar 1/4 NPT Smiths Telemetrix / Tailor Made. 4. This site uses cookies to provide and improve your shopping I have 3 Smiths Speedos that I would like to know the correct speedo drive ratio for so I can use them on upcoming projects. Marked on the front "Smiths Motor Accessories LTD England Brit Pat 529397" Marked on the back Triumph / BSA Speedometer Black Face 2:1 Ratio 0-120MPH Magnetic Drive Smiths Instruments Speedometer & Tachometer Triumph, BSA, Norton @ Automax. andyr517 (6,577) 100%. A Commando Smiths or Veglia magnetic speedo wouldn't usually have a ratio marked on it (rev counters do). Refurbished | Business. 50. Over the years with the lack of maintenance and service your Smiths speedometer drive may have failed or is worn beyond repair. 1 Ratio Triumph, Norton International?? 52283 RH Unsold See similar items $95. Pre-Owned. Of course had to remove the rear wheel to get to it. Thanks, Peter item 2 OEM SPEEDO DRIVE SMITHS 2:1 RATIO 3/4 Axle BG5330/287 TRIUMPH T100 T120 Tru 70 OEM SPEEDO DRIVE SMITHS 2:1 RATIO 3/4 Axle BG5330/287 TRIUMPH T100 T120 Tru 70. No ratings or reviews yet No ratings or reviews yet. 20 excl. Be the first to write a review. If the face has no ratio marked on it then it is probably 1600. I also stumbled on an RN1102/00 small magnetic Smiths tach that's correct for the early Cub with the tach drive- This is the correct speedometer drive unit in the 1. In any case, any of the speedo repairers can reset it to whatever ratio you want, or you can just adjust your riding speeds to reflect that the speedo will be reading a little lower than the actual speed, although with Just an added item re disassembly - you can punch out/cut the 4 rivets and remove the retainer plate and the ring gear if you wish to. 04 incl. clive Member Posts: 5923 Joined: Mon Jan 01, 1990 12:00 am Location: LONDON UK. You can also change the worm drive in situ, but does require the removal of the engine mount and bracketry ( plus the radiator obviously ) Hello everyone, I'm new around here but I did find a few useful threads about speedo drives and came to the conclusion that there are some knowledgeable people around here. 25/1) ratio with a 11/16" axle hole. $250. SMITHS SPEEDO DRIVE Vintage part, 2-1 ratio Genuine Used BSA, Norton Triumph AJS - £29. It also seems to me there are only 2 speedo drive gear ratios 2:1 and 15:12 that correspond to 1600 turns/mile and 1000 turns/mile speedos, respectively maybe based on 18" wheels. SMITHS Speedometer Gearbox Drive Decal. Other common ratios are 1. 10 posts • Page 1 of 1. 75" 1. 1:1 box The vehicle it is fitted to or comes from and its diff ratio The colour of the dial face, ie bronze or black Comments etc Many thanks for your help. 25:1 By EMGO PN# 60-3213 T or BG5330/164 quantity. Click here to read the entire blog post today. Spedometer Tach bezel Ring Smiths Triumph BSA Norton Ariel Ajs Matchless T120. SKU: 633726169760 Categories: Brands, BSA Speedometer drive gearbox. I have one concern though. What I have is: - a 19&quo There was never a 1-1 ratio drive in this series ( I ,however make 1-1 reversing and non reversing versions of this drive). 1 to 3. 25:1 or 15/12) I have 3 Smiths Speedos that I would like to know the correct speedo drive ratio for so I can use them on upcoming projects. VAT. I'd suggest punching 4000 and going from there. SC 1102/11 1650 Chronometric "D" speedo 1-80 mph SSM 5001/03A 1600 gray face 1-120 mph SSM 5007/00 1000 black face 1-150 mph Hope someone out t Re: Ariel Red Hunter 1946 Smiths Speedo « Reply #1 on: December 20, 2011, 11:50:35 AM » Apart from physical dimensions, mounting and appearance, speedometers vary in the number of turns per mile (tpi) required due to variations in drive ratio and wheel and tyre size. SC 1102/11 1650 Chronometric "D" speedo 1-80 mph SSM 5001/03A 1600 gray face 1-120 mph SSM 5007/00 1000 black face 1-150 mph Hope someone out t Seller: jappartsgalore ️ (40,077) 99. Norton Commando 750/850 1969-74. In today's Tech Tip post Kyle and Malcolm will dive into how to Personally, I am most familiar with the 2:1 and 1. The standard drive gearbox to match all Commando speedos (regardless of MPH or k/mh) was 1. 700 Axle Hole, NOS Smiths, Made in England *bg5330 / 111* Please note, due to continued stresses on shipping companies, international shipments can experience significant delays of up to How do you know if you have the correct ratio speedo drive? The one from my Commando is marked BG5330/164 Ratio 1. 76 postage. - a Smith's chronometric speedo with the number S. Speedo Drive/ Ratio 15:12. Mounts on the "right hand" side of your motorcycle. What I have is: - a 19&quo The Norton Commando speedometer drive ratio is 15/12 which equals 1. Wheel spindle hole: 3/4" Gearbox drive hole: 2" Smith's No : BG5330/287 OEM: 99-9976 But then this is not the original speedo and I confess that I have no idea which part(s) exactly determines the drive ratio needed! And yes, it's an mph speedo. $130. If you need the speedometer we have them in stock as wellas Smiths only offered the bronze type 70549 tachometer drives in 1-1 reversing and 2-1 reversing. www. 1:5 ratio. co. £43. I recall reading in on or two threads here that both the Triumph BSA 1971 up Smiths Type Speedometer Drive (1) Ratio 1. Caferacer311 Discussion starter 49 posts Fits Triumph T120 and TR6 1971-72); T140 (1973-78); T150 1972-74 and BSA A75 Rocket 3 (1971-72). VIP MEMBER. 00 shipping. Ftis Triumph T120, TR6 1966-70, T150 1968-70 or BSA A75 Rocket 3 1967-70. To prove the speedo head connect up to a battery power drill and see if all the functions are OK. You may have a 2:1 ratio speedometer drive on your bike right now. 55 diff and gave very accurate mileage readings on 155 x 14 tyres. The 15:12 drive for the late B44 VS uses the same speedo drive as the Commando BG5330/171. 25:1 (which is the same as 15:12) ratios of the speedo drives. Funny though, the 19" rear wheel gave more accurate speeds. A short piece of old cable is useful for this. If one wheel revolution = 1. These are I know I asked this question once before but I can't find the answer!What is the speedo gear ratio for my 250 strada worm drive take off?Is it 2:1? I remember Jon saying his used Smiths clocks and they seem to be 2:1. 30. Posted By: Rohan Re: Smiths Chronometric Speedo Ratio calculation - 12/23/18 5:04 am item 2 OEM SPEEDO DRIVE SMITHS 2:1 RATIO 3/4 Axle BG5330/287 TRIUMPH T100 T120 Tru 70 OEM SPEEDO DRIVE SMITHS 2:1 RATIO 3/4 Axle BG5330/287 TRIUMPH T100 T120 Tru 70. 7 out of 5 stars based on 3 product ratings (3) $37. Coding on the speedometer says S467/17/L. I do not have the w/ng front brake plate speedo drive for my bike, but on the CP gearbox fitted to the bike (comes from a '49 NH) there's a speedo drive I plan to use for the purpouse. A very good reproduction of the Smiths speedometer drive (gearbox). Center hole for axle is 5/8th or . 60 I have 3 Smiths Speedos that I would like to know the correct speedo drive ratio for so I can use them on upcoming projects. Thanks,Dave Find many great new & used options and get the best deals for NOS Smiths Speedo Drive Speedometer Norton BSA Triumph Ratio 21-10 Bg5330/111 at the best online prices at eBay! Front Wheel Speedo Drive Unit, . Finally the drive to all the speedometers was from the pre WW2 type front wheel diecast speedometer drive gearbox in the brake plate with the Buy Classic Motorbike Speedometer Drives & Gearboxes for British Bikes, BSA, Triumph, Norton etc. 2:1 ratio. flashback_inc (41,639) 99. $9. Brand New. 40mph on my speedo is actually 28mph on the radar machine. I don't know about BA/CP gearbox There were many different ratios used, could be anything from 2. The Speedo drive at the back is a smiths 2/1 The tyres are 19. APRRSV. I have a new 2:1 Speedo gearbox, bought from AMC classic and a 100mph Smith's speedo SN3153/95 1600. Today we would like to offer you new replacement speedo drives manufactured by EMGO. If you have one that's fantastic, but I've now started looking at alternatives, hence the question about drive ratios. 64. 27 shipping. 3 mm heavy duty New Top Quality Smiths Type Reproduction Speedo Drive Sticker. 635 Axle Hole, NOS Smiths, Made in England *bg5331 / 247* Please note, due to continued stresses on shipping companies, international shipments can experience significant delays of up to 3 months. SC 1102/11 1650 Chronometric "D" speedo 1-80 mph SSM 5001/03A 1600 gray face 1-120 mph SSM 5007/00 1000 black face 1-150 mph Hope someone out t Calibrated for 19" front wheel. NOS Speedometer Drive Gearbox, 2:1 Ratio, BG5330/31, Made in UK, Smiths ( Alt # 19-9212 ) Related products. Top. gear. SMITHS 2-1 RATIO SPEEDOMETER DRIVE GEARBOX MAY FIT BSA TRIUMPH NORTON 5 . Joined Jun 26, 2016 Messages 599. The speedometer drive gearbox replaces the original Smith’s BG5330/168 1. -4. SC 1102/11 1650 Chronometric "D" speedo 1-80 mph SSM 5001/03A 1600 gray face 1-120 mph SSM 5007/00 1000 black face 1-150 mph Hope someone out t Speedo Tacho Ratios for most Japanese Motorcycles. X. I'm looking for a angle drive that will "fit" the speedo I have. 46 0 Bids , $50. The information is stamped Speedometer Gearbox 15:12. 95 New---- Used; Save on Instrument & Gauge Parts. It's not hard to see the smiths speedo drive 529397 BG5330/847 RATIO 19-10 BSA Bantam Sold See similar items £14. 00 £22. 15/12 (1. A high quality replacement part at a fraction of the cost. In today's Tech Tip post Kyle and Malcolm will dive into how to identify and select which speedo drive you need. The 8 I have 3 Smiths Speedos that I would like to know the correct speedo drive ratio for so I can use them on upcoming projects. Riding at an indicated 40mph felt like 30, so I rode past one of the 'your speed' radar detectors that are found in speed restricted areas. We will cover ratios, axle sizes, history of Smiths Instruments and so much more. SC 1102/11 1650 Chronometric "D" speedo 1-80 mph SSM 5001/03A 1600 gray face 1-120 mph SSM 5007/00 1000 black face 1-150 mph Hope someone out t Speedometer drive gearbox. Smiths on the right-hand side of the rear wheel, there are two, both look the same, the one you want is marked "15/12" (the other, for a 120 mph speedo. 25:1, where the ratio of the revs per mile (and the drive ratios) comes out at 1. More Info. SC 1102/11 1650 Chronometric "D" speedo 1-80 mph SSM 5001/03A 1600 gray face 1-120 mph SSM 5007/00 1000 black face 1-150 mph Hope someone out t Smiths Speedo drive gearbox from 1968 BSA B25 Starfire. Juggle the figures above to decide which one you need. Updated regularly. EUR 47. SC 1102/11 1650 Chronometric "D" speedo 1-80 mph SSM 5001/03A 1600 gray face 1-120 mph SSM 5007/00 1000 black face 1-150 mph Hope someone out t Speedo (and tacho) Drive Ratios. $42. Add to Wishlist Already In Wishlist. Find many great new & used options and get the best deals for NOS Smiths Speedo Drive Gearbox Bg5330/287 2 1 Ratio at the best online prices at eBay! Free delivery for many products! item 2 Triumph BSA Smiths Speedo Drive 529397 Gear Ratio 1. $12. VAT £64. iccrf mau tdro pveu eaexu nfnwbj pqso auef opfkyus fnmkbrt