TDR250 1988-1990. piston kit (57.40mm bore size) . PISTON KIT. standard bore size is 56.40mm. PHOTO SHOWS THE PISTON. JAPANESE MADE. KIT BEING SOLD. IF YOU REQUIRE A DIFFERENT SIZE.
Yamaha TDR250 piston kit standard (1988-1990) 56.40mm bore size - Japanese
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