If you go down this route you really should have the speedometer re-calibrated and you will need to do the following.ĭisconnect the flexible drive from the speedometer 2. Given the tyres need to be changed every 5 years, regardless of mileage and wear, there is plenty of incentive to move to the newer and more available product. Of course parts are completely interchangeable between identical units, but many parts are carried across a broad range of speedometers, and will be completely inter-changeable. This gives the number of input shaft turns for each odometer shaft turn. Number of teeth on the worm gear multiplied by the number of teeth on the odometer wheel shaft.
My parts book shows the part number for Smiths Chronometric Speedo Number Question - Triumph Forum: Triumph Rat Motorcycle Forums. Hi, I have searched this forum, and found a lot of speedometer info, but not the thing I would like to know.
#Smiths chronometric speedometer serial numbers code
Some MGs have this number below a line and I have seen a separate number on a couple of BSAs ( to the right of the main code no and it was 1500 and in another instance the number was above the word 'chronometric'). There is another number that some chronometrics have which represents the number of turns of the speedo cable per mile. The cost of a Michelin 185VR15 is about?200 and Vredestein?95, whereas a modern Pirelli P6000 205/65 VR15 is about?55 fitted (avoid the P4000!). Reasons vary from 'it looks better' to 'they cost less' the later being particularly true. Many people consider changing the tyres on their cars to a lower profile than the standard 185's.
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