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I looked at a review of the Thruxton in (USA)MCN, and it said 60MPH indicated was something like 51MPH actual - closer to 20% error!
I wonder if they use the same speedo drive on the Thruxton as on the Bonnie. The smaller front hoop would yield more revs/mile and therefore a higher indicated speed. I hope the engineers wouldn't do that!
Anyone have access to parts fiche to see if the bonnie and the thruxton use the same speedo drive? I don't know if the speedo ratio is a known value. On harleys, you can mix and match speedo drives and speedo ratios to get the right setup for various front hoop sizes. I doubt we're that lucky.
Is the speedo serviceable? I'd like to reposition the needle for more accurate indication - I've done it on other vehicles that were nowhere near as far off as this beast.
Dave
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