85 2006 KX85 Big Bore

James

Staff member
So my buddy is trying to find a piston for a 06 KX85 that has an over bore. He measured it at 52.57 which would be a +4mm over bore, stock is 48.50mm. The problem is that the biggest piston I can find is a +2mm (92cc). Are +4mm kits even made or did he just measure wrong, he wasn't using a digital caliper?

Thanks :thumb:
 

James

Staff member
Could it be a KX100 jug? I don't know, just thought I'd throw it out there.:blah:
I think you're right, the numbers match up to a 100.

So I asked him if it could be a KX100 in a 85 frame and he said that they had blown the 85. So they got a new engine off of ebay, maybe they got a KX100 engine instead. :noidea: He did say that it fit in the frame.
 
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