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Workshop => Engine and Bottom End => Topic started by: steelreign on July 25, 2014, 01:17:17 PM

Title: top end swap possible?
Post by: 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.

Title: top end swap possible?
Post by: silverlake250r 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.

Title: top end swap possible?
Post by: steelreign on July 25, 2014, 01:32:10 PM

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

Title: top end swap possible?
Post by: Bio86 on July 25, 2014, 01:37:30 PM

Yup, piston is definitely quickest and cheaper way.

Title: top end swap possible?
Post by: steelreign on July 25, 2014, 03:50:14 PM

That's what I was thinking. Thanks guys.

Title: top end swap possible?
Post by: C-Leigh Racing 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