Description
Two Stroke Performance Cylinder Head Inserts for KTM/HQV/GG
High Compression Inserts for Two Stroke Performance Cylinder Heads and KTM/HQV/GG TBI Stock Cylinder Heads.
- 100% developed and tested in-house by TSP in Australia
- TSP Inserts include insert O-ring, head O-rings and head bolt washers
Available inserts:
- Low Compression – Roughly the same compression ratio as stock EXC or TE, much tighter squish clearance and better design than stock, suited to Extreme Enduro, resists overheating very well, pulls from very low RPM smoothly and predictably. Still gives a noticeable change in performance over stock despite compression ratios being similar.
- Medium Compression – Higher compression ratio than stock. Gives much smoother power delivery at low/mid revs and a nice increase to bottom/mid power especially. Squish clearance is much tighter than stock. Improved fuel economy. Designed for all riders between sea level and 1500m (4900ft). The most popular option for low elevation riders. 91 octane fuel recommended under 1500m.
- High Compression – Gives a very noticeable increase to bottom/mid power plus improved smoothness. Squish clearance is much tighter than stock. Improved fuel economy. Recommended for riders who want lots more bottom/mid power but are willing to sacrifice some peak power and overrev. Due to the increase in compression ratio over the stock head this design may require a thermostat fan to be fitted for tight/technical riding. A 7 or 8 heat range plug with this head is suggested. The ‘High” comp head is lower comp than many other aftermarket heads. Designed for high elevation riders who ride 1000-1500m (3300-4900ft), who want a nice increase in torque using normal pump fuel. The most popular choice for high elevation riders. 91 octane fuel recommended.
- Very High Compression – This design is targeted at high elevation riders who only ride above 1500m (4900ft). It will help to make up for the power losses due to thinner air at high elevation. It is strongly suggested that you do not use this design below 1500m. At these high elevations this head design should give similar results to the Medium or High Comp heads at lower elevations.
Upgrade your existing TSP Head for 125 and add even more power with a 12° (12 degree) Insert and Piston! 12° piston/head combinations allow for ports to be open for longer and a smoother fuel charge flow. This gives performance increases across the powerband, especially top end over rev, without loss of compression. 12° insert MUST be used with a 12° Piston (sold separately) and TSP billet head cap. Only available for `23+ 125 TBI Models.
Note: insert availability varies based on model.
Fits: See Fitment tab above
Available: In stock
Ships: Worldwide
Note: The customer takes all responsibility for ensuring that their engine setup is appropriate for their riding style and conditions.724_1
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