Max Trading now supplies high-standard KTM50 motorcycle piston sets to the global market. Designed to meet the extreme power demands of racing models such as the KTM 50SX, our piston sets utilize high-strength aluminum alloy forging technology and an optimized piston ring design, providing superior sealing and heat resistance for your two-stroke engine.
In high-RPM two-stroke racing, the Motorcycle Piston Set for the KTM50 endures immense pressure and heat loads. Aging or low-quality original pistons can lead to insufficient cylinder pressure, increased fuel consumption, and even serious engine damage.
Material Technology: Made from high-quality aluminum alloy with a high silicon content, resulting in a very low thermal expansion coefficient. This maintains precise piston clearance even in continuous high-temperature environments of 300℃.
Low-Friction Coating: The piston skirt is specially treated to reduce friction with the cylinder wall, allowing the KTM50 motorcycle piston assembly to operate more smoothly and provide faster power response.
Reinforced Piston Rings: We have improved the ring sealing design, with the 1st ring gap precisely controlled between 0.25-0.45mm, effectively locking in compression pressure and increasing torque output.
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Specifications |
Motorcycle Piston Set for KTM50 |
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Cylinder Diameter |
Usually 39.5mm; suitable for piston cylinders of KTM 50SX and other models |
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Stroke |
40mm |
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Piston Pin Diameter |
Generally around 12mm; pin length is about 33mm |
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Temperature Requirement |
Continuous operating temperature ≤ 300℃; synthetic lubricating oil (e.g., 10W50 specification) is recommended to improve high-temperature tolerance |
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Compression Ratio |
Generally between 9.5:1 and 11:1 |
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Piston Rings - End Clearance |
1st ring: 0.25-0.45mm; other rings: 0.20-0.40mm |
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Piston Rings - Side Clearance |
1st ring: generally 0.05-0.09mm; other rings: 0.03-0.07mm |
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Piston Rings - Back Clearance |
Generally about 0.35mm lower than the groove shore |
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Piston Rings - Number of Grooves |
Commonly a 2-ring structure; some models may have different designs (e.g., 2-stroke piston rings compatible with KTM EXC50) |
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Suitable Models |
Mainly suitable for KTM 50SX, Huswana TC 50, GasGas MC50 and other models |
Q1: Can this piston kit be used for oversized cylinders after an engine overhaul?
A: The size currently shown is the standard 39.5mm. If you require a 0.25mm or 0.5mm oversized piston, please contact us to confirm stock availability.
Q2: How can I extend the lifespan of this piston?
A: We strongly recommend using fully synthetic two-stroke engine oil and strictly adhering to the 10W50 lubrication standard. This will significantly reduce wear on the KTM50 motorcycle piston assembly at speeds above 7000rpm.
Q3: Is there a specific direction for installing the piston rings?
A: Yes. The markings on the piston rings must face upwards, and the ring gaps should be staggered to ensure optimal sealing.
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No.71, South Haiyan Road, Yinzhou District, Ningbo City, Zhejiang Province, China
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