172cc BIG BORE KIT FOR CHINESE SCOOTERS 61mm BORE MAY REQUIRE BORING THE BLOCK ON (SOME / MOST MODELS)SET CONTAINS CYLINDER HEAD CYLINDER (61mm) PISTON & RINGS SET *NEW COATED PISTON* ROCKER ARM SET VALVE COVER W/GASKET TOP AND BOTTOM GASKETS HP KIT CAM *OVER LAP OF 70.00 DEGREES AND HAS AN INTAKE DURATION OF 255.00 DEGREES. THE EXHAUST DURATION IS 287.00 DEGREES. YOUR LOBE SEPERATION ANGLE IS 100.50 DEGREES. THE INLET CAM HAS AN INSTALLED CENTERLINE OF 107.50 DEGREES ATDC. THE EXHAUST CAM HA AN INSTALLED CENTERLINE OF 93.50 DEGREES BTDC* FITS JONWAY, JMSTAR, ROKETA, SUNL, TANK, PEACE, TAOTAO, GATOR AND MANY OTHERS SHIPS FROM DENVER, NC
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