89 framed Hybrid, air cooled motor

Discussion for swapping a KDX motor in a MX frame...
arjay200
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Posts: 19
Joined: 12:10 am Nov 26 2019
Country: New Zealand

Re: 89 framed Hybrid, air cooled motor

Post by arjay200 » 03:47 pm Oct 22 2020

My guess would be an early 83-85 KDX engine would fit. Maybe the 86-88 engine. I'd use Ebay crankcase/bottom end pics to get a better sense of it. Compare the 84 KX125 crankcases with 84 onwards KDXs. It's always going to take a bit of work - cutting new front mounts and head stays at the least. Main thing is that the back of the engines are the same layout. Good luck, it would be a cool build.

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