86 KX250 motor>88 KX250 frame

[white rat]

Before I rip a good running bike apart, will the motor from my 86 fit in my 88? Will the 88 carb and pipe fit the 86 motor?

Cheers

[The Flyin Hawaiian]

The 88 carb was a Keihin PWK39 crescent slide carb where as the 86 was a round slide 40mm Mikuni. I dont see why you couldnt make it work. May have to rejetand the carb may not fit into the 88 airboot properly. Cant help you with the pipe and swap question. Ive been keeping an eye out for a 86 250, Id like to restore one someday.

[CR480R]

I dont know about the bottom and top engine mounts, but I do know the front mount is in the same location... The '88 intake boot and carb will work, but the pipe will not fit without mods as the angle is different on the exhaust port exits... The pipes might also be tuned slightly different because of the differences in bore and stroke... You might try fitting the '86 pipe into the '88 frame... I wouldnt be surprised at all if it worked...

[CR480R]

are you parting the '86?  If so I am interested in the frame...