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Cometic gaskets are renowned for their ability to provide an even torque load across the sealing surface
5:1 big bore forged piston
Enhances engine integrity and reliability
Crafted in the USA
or what another mechanic says the problem is
01-13 YZ250F Top End Rebuild Kit 77mm Stock Bore Replacement Cylinder Piston Kit RM85 Cometic gaskets are renowned forRestore your Yamaha YZ250F or WR250F with a complete 77mm top end rebuild kit including forged piston, cylinder, MLS gaskets, timing chain and studs. 20002, 221798, MX 09150 2, 5XC 11311 20 00, 5NL 11311 00 00, 5NL 11631 20 00, 5UL 11311 00 00, 5XC 11311 00 00, 5XC 11311 01 00, 5XC 11311 10 00, 5XC113112000, 5NL113110000, 5NL116312000, 5UL113110000, 5XC113110000, 5XC113110100, 5XC113111000, 4952M07700, 4872M07700, 40072M07700, M1029, M1034, 247937,