ATHENA Crankshaft Bearing and Seal Kit for KTM, HUSQVARNA and GAS GAS 2024-2027

ATHENA offers this engine bearing and seal kit for KTM, HUSQVARNA and GAS GAS 2024-2027. The crankshaft and gearbox shafts spin on bearings in the cases; oil seals keep the oil in around the shafts.

What is this bearing made of?

Races and balls (or rollers) in hardened chrome steel, 100Cr6 type: a very hard steel that withstands the fatigue of millions of engine revolutions.

• Open bearing: unsealed, it is lubricated and cooled by the engine oil; clean oil is its best protection.
• C3 / C4 internal clearance: slightly more clearance than normal for a hot engine’s expansion; always refit the original clearance.
• Limit: it dislikes dust and old oil; running short of oil destroys it within minutes.

Why choose ATHENA?

Athena, founded in 1973 by Giovanni Mancassola near Vicenza and based in Alonte (Italy), designs gaskets, pistons and cylinder kits; it supplies original equipment to manufacturers such as KTM, Ducati, Fantic and Triumph.

When should you replace the bearings on your GAS GAS MC 125?

Unusual vibration, a deep knock that follows engine speed or play in the con-rod: the bottom end needs a rebuild.

The manufacturer publishes no hour interval for this model: have the con-rod play checked at every piston change. Cross-Mania guideline: rebuild the bottom end every 2 to 3 top-end rebuilds.

Specifications and fitting tips

• Manufacturer part number: P400270444098

Spare parts and items to plan

• Complete engine gasket kit : CENTAURO · TECNIUM
• Gearbox bearings : HOT RODS TBK0018 · HOT RODS TBK0102
• Connecting rod kit : ATHENA P40321047 · ATHENA PB322007
• Gearbox oil : LIQUI MOLY 10W30 1 L · LIQUI MOLY 1 L

Compatibility

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

Fits:
GAS GAS EC 125 2025
GAS GAS MC 125 2027
GAS GAS MC 125 2026
GAS GAS MC 125 2025
GAS GAS MC 125 2024
GAS GAS MC 150 2025
HUSQVARNA TC 125 2027
HUSQVARNA TC 125 2026
HUSQVARNA TC 125 2025
HUSQVARNA TC 125 2024
HUSQVARNA TC 150 2027
HUSQVARNA TC 150 2026
HUSQVARNA TC 150 2025
HUSQVARNA TC 150 2024
HUSQVARNA TE 125 2027
HUSQVARNA TE 125 2026
HUSQVARNA TE 125 2025
KTM EXC 150 2026
KTM EXC 150 2025
KTM EXC 150 2024
KTM SX 125 2027
KTM SX 125 2026
KTM SX 125 2025
KTM SX 125 2024
KTM SX 150 2027
KTM SX 150 2026
KTM SX 150 2025
KTM SX 150 2024
KTM XC 125 2027
KTM XC 125 2026
KTM XC 125 2025
KTM XC 125 2024
KTM XCW 125 2027
KTM XCW 125 2026
KTM XCW 125 2025
KTM XCW 150 2026
KTM XCW 150 2025
KTM XCW 150 2024