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Old 07-22-2019, 07:40 PM   #11 (permalink)
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Originally Posted by M_a_t_t View Post
How much hp and torque does an a/c clutch hold up to? Maybe you could go electro-magnetic clutch on the rear wheel to retain engine braking?
Going electro magnet would mean you need electricity to keep it engaged. Not good for MPG. Of course, if you can reverse it, then you only need electricity to coast.

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Originally Posted by Spaghetti Man View Post
In that case I'd have to install a clutch on an NBC110 which has a centrifugal clutch.
I wonder if the grom engine would fit...

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Old 07-22-2019, 11:36 PM   #12 (permalink)
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A/c clutch is the most common. There is probably normally engaged clutches for some other application right? It would be interesting regardless.
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Old 07-29-2019, 09:46 PM   #13 (permalink)
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fwiw, the ac clutch coil is like 2 to 5 ohms, like a 50 watt load. might not be a big deal if it solves more problems than it creates.

scanning this, it looks like you can expect very roughly about 80 foot/lbs from an automotive ac clutch.

https://www.warnerelectric.com/-/med...p-1091-we.ashx

in perspective, you could put one on the output shaft of a ninja 250, and if you never used first gear you might get away with it.

they make larger magnetic clutches though, in some AWD, or a larger vehicle in need of AC.
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Old 07-30-2019, 12:03 AM   #14 (permalink)
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edit: I think probably the "grind the detent cam" so you have a half click neutral between all the gears approach would be a lot easier to implement, if you know where/how to grind.


keep in mind that most motorcycle trannys aren't properly lubricated for lots of miles unless the engine is running (or you have made other provisions).

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