JulianM

Member
Sep 28, 2020
1
0
i have myself an 89 kx80 with transmission oil coming out of the exhaust, i have the gaskets i need to fix the problem but i really would like to not split a case when there are no problems actually effecting performance. so instead i was wondering if i could fit a kx125 engine of the same year in my bike. i know most would recommend just to fix the problem that i already know how to fix, and honestly its my first real play bike (most of my experience has been fixing and selling) so i havent really been a rider. and i assume i should stick with a smaller engine until i feel comfortable. but i cant refuse a better engine if i get it off a project. will it fit?
 

Rich Rohrich

Moderator / BioHazard
LIFETIME SPONSOR
Jul 27, 1999
22,838
16,902
Chicago
If you are expecting it to bolt in without modifying the frame then no it won't fit.

If you have decent fabrication skills then anything is possible.
 
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