Author Topic: top end swap possible? (Read 2933 times)

steelreign · « **on:** July 25, 2014, 01:17:17 PM »

Is it possible to run my 89 piston and cylinder on my 86 bottom end? Thanks in advance.

silverlake250r · « **Reply #1 on:** July 25, 2014, 01:22:47 PM »

The cylinder, yes, but you need to either change the 86 crank to an 89 style long rod, or get an 86 piston for your cylinder.

steelreign · « **Reply #2 on:** July 25, 2014, 01:32:10 PM »

Do you have to split the cases to change to the long rod?

Bio86 · « **Reply #3 on:** July 25, 2014, 01:37:30 PM »

Yup, piston is definitely quickest and cheaper way.

steelreign · « **Reply #4 on:** July 25, 2014, 03:50:14 PM »

That's what I was thinking. Thanks guys.

C-Leigh Racing · « **Reply #5 on:** July 25, 2014, 06:52:27 PM »

Using the 85/86 short rod crank & 85/86 style piston, you can bolt the cylinder right on, providing the cylinder is the right bore for the piston you have.
Neil