Race Head, 88cc Big Bore kit, and 20mm Carburetor Performance Kit:

- Lightweight aluminum cylinder with steel sleeve
- Cast in mounts on cylinder for aftermarket skid plates
- Oversized cooling fins on cylinder for efficient heat dissipation
- 52mm piston with rings, pin, & clips
- Head gasket kit
- High performance race camshaft (11/4/04 - Updated camshaft - more aggressive lift and duration without sacrificing low end torque)
- Race Head – Larger valves and porting for increased performance. Also has bigger cooling fins. Includes all necessary parts. Comes disassembled.
- 20mm Performance carb assembly. Includes: 20mm carb, intake, heatstop, gaskets, mounting hardware/wrench, air filter (not shown in pic) and long throttle cable (11/4/04 - Updated throttle cable - a new type is provided that allows for more adjustment and will work on wider selection of throttles)

We recommend purchasing a high volume oil pump kit (available in this section). 

Installation Note: It will save a lot of time and effort if the oil pump is installed while installing the bore kit (requires cylinder removal).

$359.00 - tax & shipping included

108cc, Performance Stroker Kit:

This kit is the complete kit to convert your stock motor into a powerful open class 108cc engine (much more powerful than the common Chinese 107 engines). Also, this crank was made specifically for the newer engines and thus, you will not have any fitment issues like trimming the piston skirts in order to clear the crank or the piston not lining up with the cylinder deck. The kit includes the following parts:

- 51mm Crankshaft with NTN bearings
- High compression piston with rings, pin, & clips
- Race Head – Larger valves and porting for increased performance. Also has bigger cooling fins. Includes all necessary parts. Comes disassembled.
- Lightweight aluminum cylinder with steel sleeve, cast in mounts for skid plates, and larger cooling fins.
- High performance race camshaft
- 24mm Carburetor kit with intake, airfilter, and throttle cable. (Note: Presently, you will need two longer mounting bolts and two nuts as the mounting holes are not threaded like on 20mm carbs).
- Crankcase and clutch cover gaskets
- Head gasket kit

This kit requires engine disassembly and therefore, we highly recommend a professional technician install this kit. If you plan on doing it yourself, you will need to have a Clymer or Honda shop manual. Instructions do not come with the kits but the installation of the crankshaft is just like installing a Honda crankshaft. You should also have the following parts:

- High volume oil pump
- Oil Cooler

$499.00 - tax & shipping included

117cc, Stroker Kit:

This kit is the complete kit to convert your stock motor into a powerful open class 117cc engine (much more powerful than the common Chinese 107 and 125cc engines) with tons of torque!  Also, this crank was made specifically for the newer engines and thus, you will not have any fitment issues like trimming the piston skirts in order to clear the crank or the piston not lining up with the cylinder deck. The kit includes the following parts:

- 51mm Crankshaft with NTN bearings
- Race Head – Larger valves and porting for increased performance. Also has bigger cooling fins. Includes all necessary parts. Comes disassembled.
- High performance race camshaft
- Lightweight 54mm aluminum cylinder with steel sleeve, cast in mounts for skid plates, and larger cooling fins.
- High compression piston with rings, pin, & clips
- Crankcase and clutch cover gaskets
- Head gasket kit
- 26mm Performance Carb
- Intake Kit
- Jet kit with 10 different sizes (kit not pictured - recommend starting with a #100 or #105 with the 117 kit)
- Throttle Cable
- Air Filter

As with all 117cc kits on the market, installation requires engine disassembly and case boring. Therefore, we highly recommend a professional technician install this kit and the cases bored by a reputable machine shop. If you plan on installing the kit yourself, you will need to have a Clymer or Honda shop manual. Instructions do not come with the kits but the installation of the crankshaft is just like installing a stock Honda crankshaft and both manuals cover this. You should also have the following parts:

- High volume oil pump
- Oil Cooler 
- CR8HSA spark plug (not required, but recommended)

$599.00 - tax & shipping included

Kitaco 124cc SE Bore Kit:

Now you can have the largest Kitaco SE version of the TORQUE KING! Kitaco's BEST of the BEST. This is the bore kit that is the most winning bore kit in the US today. Largest valves on the market for the 124cc motors. Super fast throttle response and a cam that is designed specifically for the dirt and not a road race cam that has been adapted to motor-cross.

(Click here to view Dyno Chart)

$1,440.00 - tax & shipping included