[RMZ 450 motor for hybrid?] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

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RMZ 450 motor for hybrid?
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Posted by: rummerd

Any educated thoughts on using this motor for a swap into a 400EX frame? Does it make good power and have reliability? Any reason why this would not work?

Posted by: ill_lil_romey

You can def. make it fit into the frame, but I don't think it would work well for a quad application due to the fact that it is a 4 speed. The gearing would be very weird and you would probably run out of top end. Good for arenacross probably but I don't see that motor working well in a national.

Posted by: rummerd

Thats a really good point. I had forgotton it was a 4 speed. I think that was due to strength issues with a 5 speed? Probably not a good choice at all if the tranny is a possible weak link.

Posted by: krt400ex

The 4 speed is an obvious weak link, but the RMZ450 doesn't have hardly any bottom end. Too me thats bad. I like having bottom end because I like riding on the torque curve.

Posted by: CTmxyfz

many guys used the yzf426 motors with the 4 speeds. Some liked it even better.