Zongshen CG250 72.5mm Big Bore SuperHawk Performance Kit Hawk, TaoTao, X-Pro

  
Zongshen 250cc engine 72.5mm "SuperHawk" Performance Package is a product designed to enhance the performance of motorcycles and dual sports from various brands including Hawk, XPRO, TaoTao, Apollo, and SSR (most all of the CG250 engine line). The kit includes a larger piston and cylinder to increase the engine displacement from 229cc to 268cc, resulting in improved power and torque. This product is specifically designed for Zongshen or similar CG250 brand engines and is compatible with various models. You can expect a substantial gain in bottom end torque, and if properly tuned, around 80+mph top speed (this varies greatly depending on rider weight and specifically with what other mods you have). The ignition has no rev limiter and with the high lift cam the engine will reach 9k-10k RPM, and it will get there quick. This is why it is vital to have the oil cooler-cooling the oil and returning it from top down via the included valve cover. With this much increase in displacement, RPM and power, the engine will generate more heat- and heat is a killer of performance.

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.