160cc (60mm) Bore Kit, Import Race Head and 28mm Carb Kit for Chinese 124/140/146cc Engines:

- Import Race Head - 30mm intake valve, 23.5mm exhaust valve, 30mm intake port, 25mm exhaust port (valves installed).
- High performance race camshaft with 32T sprocket (NOTE - this item is not pictured in the kit but is included)
- All aluminum ceramic plated 60mm skirtless cylinder
- High compression 60mm piston with rings, pin, & clips
- Head gasket kit
- 28mm Performance Carb (125 main/50 pilot)
- Intake Kit matched to Import Race Head - 30mm intake port.
- Jet kit with 3 different sizes (Stock size is a #190 - Extra jets sizes of 155, 165 & 175)
- Throttle Cable
- Dual Layered Foam Air Filter

This160cc kit includes our new Import Race Head which takes the power gains on these engines to yet another level!  If you have a Lifan head or are thinking about getting one, this new head is like taking a Lifan head to a performance/machine shop that specializes in re-working heads and having them install higher quality/larger valves, heavy duty valve springs, and doing a port job to increase flow.  While this head is more expensive than a new Lifan head, any reputable shop would charge considerably more to make the Lifan head comparable in performance.  The valve sizes are 30/23.5mm with port sizes of 30/25mm.  The exhaust valve is stainless (21-4N material) and unlike the Lifan head, you wont have to worry about changing your valve springs.   This all adds up to a cylinder head that puts out a professional level of performance yet is still affordable for the privateer rider.  The kit also includes an all aluminum ceramic plated 60mm skirtless cylinder.  This cylinder is lighter than a steel sleeved aluminum cylinder, reduces friction (increasing power), improves sealing, and provides better heat transfer (runs and cools down quicker). Also included is a very light weight high revving piston and a head gasket kit. For additional performance, this kit includes our 28mm performance carb, intake kit, throttle cable, and air filter.  The combination of the new Race Head, 160cc ceramic cylinder bore kit, and the 28mm carb kit results in very impressive power and performance. These are high quality parts and require no machining to the cases or other modifications - bolt on and go!

Important Note: This kit will only work on Chinese 124/140/146cc engines with a 57mm stroke and a 13mm piston wrist pin. Common models are Pitster/GPX and Thumpstar but there are so many Chinese brands/models that you absolutely need to know your stroke and piston wrist pin size. Unfortunately, we are unable to tell you what you have based on a brand name as there are so many unknown Chinese brands. 

Installation Notes: Its very important that you use Hondabond (or similar quality) sealer on the head gasket.  Also, don't use the original o-rings between the head and cylinder (not needed) but do use the large o-ring at the bottom of the cylinder between the cylinder and the engine case at the oil return. There are no installation instructions, but if you can replace your piston, you can install this kit. If you don't have any experience working on your engine, we highly recommend having a professional technician install this kit. The parts are installed in the same manner as OEM parts.