These piston rings are produced for Triumph 650 c.c. motorcycles by Grant and are a superior choice for your vintage British motorcycle. Made in the USA.
NOTE: Triumph 650 c.c. bikes have a 71 mm bore standard, +0.020″ is 71.5 mm, +0.040″ is 72 mm, +0.060″ is 72.5 mm, and +0.080″ is 73 mm.











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