This CNC machined TSP head insert suits KTM ‘Group’ models 250 SX/XC TBI Models 2023-on.
The models include:
KTM250 SX/XC 23-on
Husky TC250 23-on
GasGas MC/EX250 24-on
This kit does not suit EXC/XC-W/TE/EC Models.
You will receive one (1) cylinder head insert for your make/model, and a cylinder head o-ring and washer kit so you can bolt it straight on.
The TSP insert can be used in conjunction with the TSP Cap as a complete head, or you can use this insert inside your stock cap.
Our key TSP insert features are:
- Drastically improved throttle response in the whole RPM range
- Smoother throttle response
- Much better part throttle power
- Much more enjoyable to ride
Our options are as follows:
- MEDIUM COMP – this head suits high level MX at sea level on normal pump fuel, or trail riders and intermediate racers who want improved throttle response and a nice increase to power across the rpm range. Although this compression ratio is only marginally higher than stock, the improved design gives better throttle response and better power everywhere, especially when combined with our ECU tune. The power delivery is stronger and more tractable than stock and suits a wide range of riding conditions. Suited to 95 or 98 RON fuel (approx 89 or 91 in the USA).
- HIGH COMP – this head is higher compression than stock and suits high level MX at sea level with high octane fuel OR trail riders and intermediate racers at sea level with pump fuel. This head pushes the limits of normal 98 RON pump fuel at sea level (approx 91 in the USA) but can be used in normal trail riding conditions safely in order to achieve maximum bottom/mid performance. Likewise, intermediate racers who are not revving hard all day can get away with this head at sea level on pump fuel. If you are using this head at sea level for faster MX, deep sand riding or in very cold weather we would suggest running the softer/richer White map and/or some higher octane fuel. This head can also be used at elevations above 1000M to approximately replicate a medium compression head at sea level. Above approx 1000m it is safe for pump fuel under normal riding conditions.
Our Heads/Inserts work best when used together with an ECU reflash. It is highly recommended doing an ECU tune at the same time to get the best results.
All TSP mods are designed and dyno tested in-house at TSP so you can be sure you’re getting reliable performance for local conditions.
