S3 exhaust power valve assembly.

High quality kit from the hard enduro specialists from Spain. It's a direct replacement for the stock parts.
Part number: GA-1124-CT.

This fits:

• the 1996-2018 GasGas EC250
• the 1996-2019 GasGas EC300.

Complete as pictured.

S3 top end gasket kit.

High quality parts from the hard enduro specialists from Spain.
S3 part number: GA-GG-EC.

You will get:

• cylinder base gaskets (0.15 and 0.30 and 0.50mm thickness)
• inner and outer cylinderhead o-rings
• right and left power valve gaskets
• water neck gasket
• exhaust flange gasket
• exhaust o-rings (silicone)
• etc.

This fits:

• the 1996-2020 GasGas EC250
• the 1996-2020 GasGas EC300.

Complete as pictured.

S3 piston kit (by Vertex).

High quality kit from the hard enduro specialists from Spain. S3 pistons are cast for maximum performance; they feature a 18% silicone content for strength and durability. 

Details:

• cast premium quality piston (Vertex), with 18% silicone content
• with Molybdenum Disulfide (MOS2) coating for increased lubricity and ease of break-in
• with nitride coated steel rings
• lightweight and durable
• limits vibrations
• offers a faster revving engine.

You will get:

• 1 piston
• 1 piston ring
• 1 wrist pin
• 2 clips.

Part number: PI-963.

This fits: the 1996-2018 GasGas EC300.

Complete as pictured.

S3 complete top-end rebuild kit with Vertex piston.

High quality kit from the hard enduro specialists from Spain. This comprehensive kit contains everything needed for a proper top-end rebuild. 

Vertex piston kit:

• cast premium quality piston (Vertex), with 18% silicone content
• with Molybdenum Disulfide (MOS2) coating for increased lubricity and ease of break-in
• with nitride coated steel rings
• lightweight and durable
• limits vibrations
• offers a faster revving engine.

S3 gasket kit:

• cylinder base gaskets (0.15 and 0.30 and 0.50mm thickness)
• inner and outer cylinderhead o-rings
• right and left power valve gaskets
• water neck gasket
• exhaust flange gasket
• exhaust o-rings (silicone)
• etc.

This fits: the 1996-2018 GasGas EC300.

Complete as pictured.

S3 complete top-end kit.

High quality kit from the hard enduro specialists from Spain. This is a 225ccc. upgrade kit; all parts are a direct replacement for the stock parts.

Details:

• forged premium quality piston
• alloy nicasil racing cylinder, made in Spain
• Nicasil treatment reduces friction and internal heat. Diamond stone honing finish
• cylinderhead + insert
• top quality premium gaskets top end kit.

You will get:

• S3 GasGas Racing 225cc. factory cylinder
• S3 Vertex full piston set
• S3 cylinder head
• S3 cylinder head insert
• S3 gasket and o-rings set.

Part number: CYKC-GG-TR225-UP.

This fits:

• the 2002-2014 GasGas TXT 125
• the 2002-2014 GasGas TXT Pro 125.

These model years have the vertical water outlet.
S3 recommends using heavier flywheel to get the best torque.

Complete as pictured.

S3 'Extreme' cylinderhead for the GasGas EC300.

High quality parts from the hard enduro specialists from Spain. Ultra-trick looking part.

This is the 'extreme' head: Modifies the compression for a smooth and progressive delivery of power. Improving traction and engine control especially important in technical areas. Its design manages to lower the temperature by eliminating the typical hot spots of the original cylinder heads. Ideal for extreme style riding, improving the throttle feeling.

S3 part number: XTR-1058-300-R.

You will get:

• cylinderhead
• cylinderhead insert
• cylinderhead o-rings.

This fits: the 2018-2020 GasGas EC300.


Complete as pictured.

S3 'Power' cylinderhead for the GasGas EC300.

High quality parts from the hard enduro specialists from Spain. Ultra-trick looking part.

This is the 'power' head: Modifies compression, allowing one more gear to be used, improving power delivery and engine torque. It is also recommended for use at an average altitude of 1000m. Its design manages to lower the temperature by eliminating the typical hot spots of the original cylinder heads. Ideal for aggressive riding, looking for strong emotions.

S3 part number: PWR-EC-300-R.

You will get:

• cylinderhead
• cylinderhead insert
• cylinderhead o-rings.

This fits: the 1998-2017 GasGas EC300.


Complete as pictured.

S3 'Extreme' cylinderhead for the GasGas EC300 TBI.

High quality parts from the hard enduro specialists from Spain. Ultra-trick looking part.

This is the 'extreme' head: Modifies the compression for a smooth and progressive delivery of power. Improving traction and engine control especially important in technical areas. Its design manages to lower the temperature by eliminating the typical hot spots of the original cylinder heads. Ideal for extreme style riding, improving the throttle feeling.

S3 part number: XTR-163-300-R.

You will get:

• cylinderhead
• cylinderhead insert
• cylinderhead o-rings.

This fits:

• the 2024 GasGas EC300 TBI
• the 2024 GasGas MC300 TBI.

(this only fits TBI models - not TPI models)


Complete as pictured.

S3 top end gasket kit.

High quality parts from the hard enduro specialists from Spain.
S3 part number: GA-GG-EC-125.

This fits: the 1998-2016 GasGas EC125.

Complete as pictured.