Yuminashi 140cc 4-valve top end kit for Honda Nice and Wave 110 / XRM100 / XRM110 / REVO100/110 / etc...
This Big Bore 56mm ( 50 x 55.5mm = Original Bore x Stroke) kit, so 137cc real, includes the 4 valve cylinder head, piston, racing camshaft, seals and everything you need to fit the kit to an STD stroke crankshaft.
※ The crankcase diameter needs to be enlarged to fit the 56mm cylinder.
※ The height of the cylinder block is 72.8mm, which is 5.38mm shorter than the original OEM cylinder block (Yuminashi 4mm aluminium spacer set (LINK) 12191-KFL-0459S is included in the kit).
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