PROX Top End Gasket Kit (base + head) for HUSQVARNA TC, TE, TX 300, GAS GAS EC, EX, MC 300 and KTM EXC, SX 300 2023-2026

PROX offers this top-end gasket kit for HUSQVARNA TC, TE, TX 300, GAS GAS EC, EX, MC 300 and KTM EXC, SX 300 2023-2026. The top end is the cylinder, piston and cylinder head. When they are taken apart, the gaskets sealing them are crushed and cannot be reused.

Why buy a complete kit?

The benefits:

• Every top-end gasket in one part number: nothing is forgotten at reassembly.
• Cheaper than buying the gaskets one by one.
• New gaskets guarantee compression and sealing against water, oil and gases.

Why choose PROX?

ProX, the Dutch engine-parts specialist since 1975, has its parts made in factories that also supply the manufacturers: OEM quality at a more affordable price.

When should you replace the gaskets on your GAS GAS EX 300?

An oil or coolant leak, seepage around the cases or a loss of compression signal a tired gasket. Having the kit to hand means the bike is never stuck waiting for one missing gasket.

No manufacturer hour figure for this model. Cross-Mania guideline: compression check every 20 h in hard use and every 40 h for leisure.

Specifications and fitting tips

• Manufacturer part number: 36.6334

Spare parts and items to plan

• Piston : ATHENA · WOSSNER
• Piston rings : ATHENA · WOSSNER
• Spark plug : NGK 5122 · NGK 6664
• Coolant : LIQUI MOLY 1 L · TWIN AIR
• 2-stroke oil : LIQUI MOLY 1 L 3065 · LIQUI MOLY 1 L 3063

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
GAS GAS EC 300 2025
GAS GAS EC 300 2024
GAS GAS EX 300 2026
GAS GAS EX 300 2025
GAS GAS EX 300 2024
GAS GAS MC 300 2025
HUSQVARNA TC 300 2025
HUSQVARNA TC 300 2024
HUSQVARNA TC 300 2023
HUSQVARNA TE 300 2025
HUSQVARNA TE 300 2024
HUSQVARNA TX 300 2025
HUSQVARNA TX 300 2024
HUSQVARNA TX 300 2023
KTM EXC 300 2025
KTM EXC 300 2024
KTM SX 300 2025
KTM SX 300 2024
KTM SX 300 2023