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Thanks Ron - it already has a Tiny Tach/Hourmeter in it - not all that impressed with it - is small, hard to read, no lighting, has a substantial lag in its display and no ability to set a redline.
Hence I was looking for an alternative and the one I have got fits the bill, as long as I can get the light programmed - not an issue in top gear unless going downhill but is easy to over rev in lower gears and the bright red light should catch my attention if that happens.
Garry
the Rolls Royce of the tiny tach idea is a item made by Red lion controls.
It should work on the wiring in place for the tiny tach.( it can be programed to read the speed of anything)
It is much larger and easy to read...........but costs a lot.
I used one as a rotor tach on a gyrocopter for many years and loved it.( it counted the teeth on a ring gear)
I could find a part number.........they make a very large range of products.
Is your haffie still fitted with the original governor ?
I remember the standard governors worked very well when the small drive belt was fitted.( I think it had a handle which could give two different settings)
People usually removed the drive belt to get a little bit more road speed.
No governor fitted and a different carby so the system will not work if fitted anyway.