I'm having problems with my 1500 ohc motor and Speedo not agreeing with each other. So, my question is, if my Speedo is reading a lot faster than I'm actually going and I wanted to replace the Speedo gear with a more appropriate one, where do I start looking?

Will a gear that typically fixes this problem in a mini fix the problem with my 1500 motor too?

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Don't know anything about 1500...
... But a good site for mini speedo gear info :
http://www.guess-works.com/Tech/speedo.htm

I don't think the speedo gear is related to a Mini, the part numbers from the Australian Morris 1500 parts books don't seem to get any hits on google.

The parts book lists 42H67
The price book lists 24H67A being replaced by 42H1294.

The best thing to do is work out how far out the speedo is running and get the speedo recalibrated to match the car.

The speedo runs on a magnetic drive and easilly recalibrated.. The odo is gear driven however.

Cheers, Ian

Speedo repair shops can supply a gearbox that screws onto the cable for calibration.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.