TSP CNC Head 2026+ Beta 350 RX Models

This TSP CNC Head for 2026+ Beta RX350 models with the optional Off-set Flywheel Key makes a massive change to the standard power curve over stock with over 8 HP over peak power! The improved combustion chamber design gives more performance throughout the rev range as well as reduced risk of detonation. The head comes with a complete head gasket kit.

All TSP heads and inserts are designed to run an NGK spark plug. Highly recommended. 

This head is to designed for the following models:

• Beta 350 RX 2T 2026-on models

This Beta RX350 head makes a massive change to the standard power curve over stock with over 8 HP over peak power! This is a gain of 16.5% at peak power. Absolutely amazing results over stock power to truly wake up your RX350.

You will receive the following:

• TSP Cylinder head & Insert
• 1.5mm thick base-gasket
• Base-line jetting specifications
• Recommended Power valve settings
• Cylinder head o-ring and washer kit

Please note: Models with the dual spark head design will need to disconnect one of their coils, and convert to the single standard Beta 300RR 14mm spark plug to run our head design.

Our key TSP Head features are:

• Improved throttle performance in the whole RPM range
• Much more power throughout the RPM range, with over 8HP at peak!
• Smoother throttle response
• Improved combustion chamber design that gives more performance from bottom to top
• Reduced risk of detonation

Our new TSP billet cylinder heads are machined from solid 6061 T6 stock and offer improved performance, reliability and fuel economy. They are the best bolt on mod you can buy for your bike!

These billet machined heads feature TSP’s proven combustion chamber designs and are a ‘must have’ mod for most current model offroad bikes. Our combustion chamber designs have been used by hundreds of happy customers and have been extensively dyno tested. The gains are consistent and include:

• Increased power throughout the rev range
• Improved fuel economy
• Greatly reduced risk of detonation
• Increased top end life in many models
• And much SMOOTHER power delivery.

The unique Billet design has been 100% developed, machined and tested in-house at TSP.