Yamaha YZ85 combustion chambers Chamber selection:Y01 - 6.4cc Stock KX250 99-04
Description
KX250 99-04
Kawasaki KX100 Phathead cylinder head kit for Hotrods stroker crankshaft 1991-2021
YZ295 - 72mm 91+ octane 23
XR600 88-00
Stock compression
Yamaha YZ85 combustion chambers Chamber selection:Y01 - 6.4cc Stock KX250 99-04Chamber selection: Y01 6. 4cc Stock Y02 6. 0cc (95+ octane) Y03 5. 6cc (100+ octane) Y04 5. 2cc (105+ octane) Y105 Big bore 52. 5 91+(100 suggested) Y110 Big bore +2mm Hot Rods stroker crank 4134
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