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Racing Big Bore Kits
YZ250 1999-2011 300 Big Bore kit.
The kit includes: 72mm 293cc big bore cylinder. Wossner 72mm piston, rings, pin and clips, top-end bearing and a top-end gasket set..This is a bolt on kit, no case mods needed. Send your top-end(cylinder, head ,and powervalves)
This kit is fully ported and polished Fits: 1999-2011 YZ250 (2 -stroke)
Total for the kit: $750.00 on your cylinder, head and powervalve