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Ari Henning - Ride a CBR300R, CB300F, CB300R, Rebel 300, or a Grom, Monkey or CRF250L with a 300 engine swap? You can go from 286cc and a paltry 10.7:1 compression ratio
Cylinder Kit 76mm Cbr250i Cbr300 Cbr 300 R 1310-kyj-305 12251-kyj-901 12192-kyj-900 12100-k33-d00 Cbr 250cc Engine Oem Parts - Engines & Engine Parts - AliExpress