ATHENA standard bore 250 Cylinder Kit Ø78 mm for KTM SXF 250, XCF 250, HUSQVARNA FC 250 and GAS GAS EXF 250, MCF 250 2016-2023

On KTM SXF 250, XCF 250, GAS GAS EXF 250, MCF 250 and HUSQVARNA FC 250 from 2016 to 2023, the ATHENA P400270100020 cylinder kit fits in place of the original part. A cylinder that is scored, oval or has a damaged coating loses compression and wears pistons out quickly. Rather than having it rebored and recoated, this kit replaces it with a new, ready-to-fit cylinder.

Specifications

• Brand: ATHENA
• Manufacturer part number: P400270100020
• EAN code: 8050038445252
• Engine: 4-stroke

When to replace it?

• Cylinder scored or coating flaking after a seizure.
• Ovality or taper out of tolerance when measured with a micrometer.

Measure the cylinder at every piston change. As soon as it falls outside the tolerances in the manual or is scored, it has to be replaced or reconditioned.

Fitting tips

1. Carefully clean the top of the crankcase and cover its opening before removing the old cylinder.
2. Oil the supplied piston and check the ring end gaps before fitting the cylinder.
3. Use new gaskets, either those in the kit or a suitable top end gasket kit, and tighten the cylinder and head in a criss-cross pattern to the manufacturer's torque.
4. Fit a new spark plug and refill the coolant.
5. Break the engine in gently for 3 to 4 hours, as Athena recommends for its cylinder kits.

Why ATHENA?

Founded in 1973 near Vicenza, Athena is an Italian engine gasket specialist that has made its gaskets on its own production lines since day one, as well as a renowned manufacturer of pistons and cylinder kits. The brand supplies original equipment to manufacturers such as KTM, Ducati, Fantic, Piaggio and Triumph, and is a partner of the MXGP motocross world championship.

Spare parts and items to plan

• Piston : ATHENA S5F07800002 · ATHENA S5F07800002A
• Top end gasket kit : ATHENA
• Spark plug : NGK 97225 · NGK 3521
• Coolant : LIQUI MOLY 1 L · TWIN AIR

Frequently asked questions

What does the kit contain?
The cylinder, its complete piston and a specific gasket kit.

Which spare parts should I plan for?
For the next service: piston, rings, pin, circlips and top end gaskets in the same size as this cylinder.

Compatibility

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

Fits:
GAS GAS EXF 250 2023
GAS GAS EXF 250 2022
GAS GAS EXF 250 2021
GAS GAS MCF 250 2023
GAS GAS MCF 250 2022
GAS GAS MCF 250 2021
HUSQVARNA FC 250 2022
HUSQVARNA FC 250 2021
HUSQVARNA FC 250 2020
HUSQVARNA FC 250 2019
HUSQVARNA FC 250 2018
HUSQVARNA FC 250 2017
HUSQVARNA FC 250 2016
KTM SXF 250 2022
KTM SXF 250 2021
KTM SXF 250 2020
KTM SXF 250 2019
KTM SXF 250 2018
KTM SXF 250 2017
KTM SXF 250 2016
KTM XCF 250 2022
KTM XCF 250 2021
KTM XCF 250 2020
KTM XCF 250 2019
KTM XCF 250 2018
KTM XCF 250 2017
KTM XCF 250 2016