TBparts CRF50 Stroker Kit 3

***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 – Please see the Billet Housing upgrade
we have available for more details. Also, do not
tighten the clutch nut with a hammer and screw driver – it must be torqued on!

See the
Performance Info section for additional information on our performance products
and links to instructions for the top end and oil pump.