Maintenance & Technical > KX500 Original

86 bottom end with 88 top end

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kwakman:
somebody said it can be done, some say there isnt enough metal to drill the 3rd p/valve hole in the cyl/case face. best bet is to compare the 88 case with an 89 base gasket and have a gander yourself......K.

turdle:

--- Quote from: Marco810 on April 08, 2012, 06:58:18 AM ---how about a 86 to 88 on a 89+ bottom end?

--- End quote ---
my guess would be you would have to seal the hole for the center kips somehow. not sure tho i dont have a 89 up lower end to look at. :|

jyeomans:
Could I expect any differences in compression ratios. I am assuming 86 and 88 had different head gasket thicknesses?
I am planning on using a 1988 wiseco piston at stock bore.

dave916:
the heads 86 to 88 are all different, the 88 has 0.2mm oem head gasket , 

kwakman:
hold up. you said 86 to 88 on 89 on bottom end? No problem whatsoever. sorry, I read that wrong.if you mean old bottom end to new cylinder you need to check your 86-88 cases against an 89 on gasket before you decide. don46 has the facts on this I believe he runs one on one of his engines, or has at some point....K.

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