


The silent rocker arms will reduce friction as well, and keep the CG a little quieter. This kit comes with two cams, so you can go for torque with the low lift cam or mid-range to top end power with the high lift cam. You should expect an increase of 20% -35% in horsepower and torque. Remember, torque will get you there, horsepower will keep you there. It is recommended that at a minimum, you re-jet your stock carb with this kit.
(If you port and polish the head with this kit, you want the biggest carb you can get without going too big). This is a complete top end Big Bore rebuild kit, with 72.5mm piston, piston rings, pin clips (Circlips), 16mm wrist pin, valve stem oil seals, exhaust and head gaskets plus performance parts. Some newer model CG250 engines might have a smaller engine case diameter than previous models, requiring minimal machine work. Turning the cylinder sleeve down to 75mm and/or opening/cleaning up the engine crank case diameter.However, the performance gain is well worth it. We will respond within 24 hours, although response time is generally within an hour. IMPORTANT-this will not fit a the 2023 and newer Hawk 250 X-Pro models.
This kit has a 16mm wrist pin. Please ensure that your engine has a 16mm wrist pin before purchasing. This kit is for 16mm wrist pins only! If your Hawk 250 has a counterbalance shaft on the engine then it likely has a 15mm wrist pin.