KX Riders
Maintenance & Technical => KX500 Original => Topic started by: nirvanafan98 on November 18, 2012, 01:11:29 PM
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I took top bend off my kx500. 87 model. Used. Doesn't have the electro fusion cylinder in it .some one put a sleeve in it . A magnet will stick to it . Also piston is different that stock . It has a newer style double set of rings . My question is I measured the cylinder with a micrometer. Measured 87.85 mm. Piston measured measured 87.35. The Wiesco position says 2.00 mm I assume that means 2 over stock . That would be 88mm right. Want to do a top end rebuild. Does the cylinder has to bored to 88mm or can I just get a new piston and what size ? Thanks for help.
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If your piston says 2.00mm oversize the piston should measure 87.8/87.95mm
bore should be 88.035/88.10
A 2.00mm wont fit in 87.8mm bore
if the piston says 2.00mm on it sounds like your measuring might not be correct
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OK , thanks. I bought the bike used an 87. Someone put a bore able sleeve in it and the incorrect piston. The new style. Will have to bore cylinder. And rebuild top end. Thanks again.
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If is has 2.00mm piston fitted you wont be able to bore cylinder
{post a few pictures}