BUN Freestyle B21R (+21m stroke) 1200cc complete crankshaft assembly.
Uses OEM Yamaha SuperJet spec crank seals. Find genuine OEM seals here.
*Special order part - not stocked at all times
We suggest using 1211 Gasket Sealant for assembling the crankcase halves back together.
Part Number: 82-BUN21CRANK
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