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Buying a tach for my 2014 Honda Shadow Phantom 750...drive ratio? (lemmy.world)

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]

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Hi guys!

So, my 2014 Honda Shadow Phantom 750 (as any Honda Shadow, really) comes without a tach. I'm considering to buy one. I think on my previous one it might have been a Biker's Choice tach, and so I'm even considering the same one, as I was happy with it. But checking around, it seems I need to know beforehand the drive gear ratio in order to get proper measuring. How can I find out this on my bike?

Thanks!

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[–] [email protected] 2 points 1 year ago (1 children)

You would need to know the drive gear ratio if you were using an old (pre-early 1970s) mechanical tachometer that works off a spinning cable, but a '14 shadow 750 shouldn't have a thing to make a cable spin. You would use an electronic tach, which uses the spark plug wire as a signal.

[–] [email protected] 1 points 1 year ago

Thanks a lot! I had no idea, and this helps a lot :)