TRX 300EX

We carry 76mm pistons from JE & Wossner for this model.

We can Bore & Hone your cylinder as well!

We personally use WEB CAMS in all of our 300EX builds. Many grinds to choose from, we try to keep them in stock. Core is required

+2mm ( 27.5mm ) Intake Valves       *Valve Seat Machining Required*

+.5mm ( 23mm ) Exhaust Valves

We use the SPARKS X-4 Exhaust on our Schoolboy 300cc builds

True 300cc Engine Package. 

Used by multiple GNCC, WEXCR & AWRCS winners. 

Produces 30HP on our Dyno when paired with a Sparks X-4 Exhaust.

Package Includes: 

76mm JE Piston

Web Cam & Rocker Arms (Your Cores Required )

HD Valve Springs

Oversize Intake & Exhaust Valves

Top End Gaskets

MVP Mods Viton Valve Seals

Aftermarket 400ex Carb

Porting / SERDI Valve Job

Cylinder Boring ( Bore & Hone Customers Cylinder )

* Engine Teardown & Assembly available for an additional charge *