TBparts Stroker Kit 3 - XR70 CRF70

***NEW**Stroker Kit 3

1/06/07 The kit now includes the proven Mikuni VM26 carburetor which will provide better performance and ease of tuning.  6/26/06 Our Race
Head has been updated for even more performance!  It now has 25/22mm valves with better porting/flow.  We also kept the combustion chamber the same size and changed the angle of the valves slightly.

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 and 125cc 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
– NEW Race Head – Larger valves (now
25/22mm) and better flow for increased
performance. Also has bigger cooling fins. Includes all necessary parts and 
comes assembled!
– Lightweight aluminum cylinder with steel sleeve, cast in mounts for skid
plates, and larger cooling fins.
– High performance race camshaft 
– NEW Genuine Mikuni VM26mm Performance Carb
– Intake Kit
– Jet kit with 3 different sizes (Stock size is a #195 – Extra jets sizes of (155, 165 & 175).
– Throttle Cable
– NEW Dual Layered Foam Air Filter 
– 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 stock Honda
crankshaft. You should also have the following parts:

– High volume oil pump
– Oil Cooler
– CR8HSA spark plug (not required, but recommended)
– If you purchased one of our Manual Clutch Kits prior to
6/30/05, will recommend purchasing the Upgrade Disk Kit that we have available. Additionally, we do not recommend the use of an inner rotor kit with this clutch (on a 108cc or larger engine) as it can lead to premature clutch failure due to extra fatigue placed on the clutch housing. However, we offer an upgrade which allows use of inner rotor kits and larger displacement engines.  Also, do not
tighten the clutch nut with a hammer and screw driver – it must be torqued on!

XR70 CRF70