TB 150 160 Race Head V2 Upgrade Kit – GPX/YX150/160

150/160cc Race
Head V2 Upgrade Kit:

– Race Head V2 – Roller rockers, 30mm intake valve, 24.5mm exhaust valve,
27mm intake port, 23mm exhaust port (valves installed).
– Race Camshaft V2-1 for Race Head V2 (we can switch to our V2-2 if preferred,
just email after your order is placed and request the change)

This kit is for stock YX/GPX 150/160 engines and
only includes our new Race Head V2 and camshaft (see Important Note
below). While the new head may appear to be the same on the outside as our other
KLX110 type race head, internally it has gone through numerous changes. 
The addition of roller rocker arms and a new camshaft are the biggest changes
followed by bigger valves and ports. The exhaust valve is now stainless as well
(21-4N material).  This all adds up to a cylinder head that puts out a
professional level of performance yet is still affordable for the privateer
rider.  These are high quality
parts and require no machining to the cases or other modifications – bolt on
and go!

Important Note: This kit does not contain a piston. 
This head will not work with stock YX/GPX pistons.  We recommend getting
the TBW9028 kit in this
section that includes the piston and a gasket kit.  If you don’t use one of
our newly modified pistons, check your your clearances very carefully and modify
your piston’s reliefs to clear the bigger valves, if need be.

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.