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The piston moves up and down in the cylinder to turn combustion into motion: this kit replaces it along with its rings, pin and clips.
Available in several sizes.
PROX offers this piston kit for KTM EXC 300, SX 300, HUSQVARNA TC 300, TE 300 and GAS GAS EC 300, MC 300 2018-2026. The piston slides in the cylinder and takes the force of the air-fuel combustion, passing it to the connecting rod and crankshaft.
The benefits:
ProX has its pistons made in Japan and the USA, with Japanese rings (Riken, TP or NPR) and tolerances at least equal to OEM; most of its four-stroke pistons are forged.
Harder starting, loss of power, blue smoke, oil consumption or a knock when cold: these are the signs of a tired top end.
No manufacturer hour figure for this model. Cross-Mania guideline: compression check every 20 h in hard use and every 40 h for leisure.
Available in several sizes: choose the one that matches your cylinder (stamped size or measured bore). Diameters: A = 71.94 mm, B = 71.95 mm, C = 71.96 mm.
Check the exact model and year of your bike in the list below before ordering.
Fits:
GAS GAS EC 300 2026
GAS GAS EC 300 2025
GAS GAS EC 300 2024
GAS GAS EC 300 2023
GAS GAS EC 300 2022
GAS GAS EC 300 2021
GAS GAS MC 300 2026
GAS GAS MC 300 2025
HUSQVARNA TC 300 2026
HUSQVARNA TC 300 2025
HUSQVARNA TE 300 2026
HUSQVARNA TE 300 2025
HUSQVARNA TE 300 2024
HUSQVARNA TE 300 2023
HUSQVARNA TE 300 2022
HUSQVARNA TE 300 2021
HUSQVARNA TE 300 2020
HUSQVARNA TE 300 2019
HUSQVARNA TE 300 2018
KTM EXC 300 2025
KTM EXC 300 2024
KTM EXC 300 2023
KTM EXC 300 2022
KTM EXC 300 2021
KTM EXC 300 2020
KTM EXC 300 2019
KTM EXC 300 2018
KTM SX 300 2026
KTM SX 300 2025
KTM SX 300 2024
KTM SX 300 2023
Click on your bike to see all compatible parts.
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