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Question about bore size on CR 125`s
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[QUOTE="Matt90GT, post: 1363860, member: 30871"] stock bore is 54 mm, and the stroke is 54.5. pretty square there. same bore size till the end of the bike in 07 GASKET, CYLINDER HEAD 12251-KZ4-701 $15.58 that is the OEM honda number for the stock headgasket and motosport.com pricing on it. now if you have an aftermarket sleeve and piston to make it a big bore unit, you will need to match up the head gasket. largest bore I see is 56mm which is a 2mm overbore from stock on wiseco's site which is a 134cc kit. Wiseco will make gaskets, cometic and other companies make gaskets up to 2mm overbore. larger than that, you need to find out who made the piston to find the maker for the kit like a 167 stroker/bore kit on the bike. You can always contact Eric Gorr for more info, but be sure to know what piston is in there and the bore size before calling. [/QUOTE]
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Dirt Bike Brands - Other
Question about bore size on CR 125`s
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