VERTEX Ø78 mm 4 Stroke Piston Ring Set for KTM EXCF 250, HUSQVARNA FC 250, GAS GAS MCF 250 and KAWASAKI KX 250 2013-2025

VERTEX offers this piston ring set for KTM EXCF 250, SXF 250, HUSQVARNA FC 250, FE 250, GAS GAS ECF 250, MCF 250 and KAWASAKI KX 250 2013-2025. Rings are thin steel bands sitting in the piston grooves. They press against the cylinder wall to hold compression and scrape oil.

Why replace the rings?

The benefits:

• Regain compression and power.
• Reduce oil consumption and smoke.
• A cheap fix when piston and cylinder are still within spec.

Why choose VERTEX?

Vertex has made its pistons in Italy since 1953 and has supplied KTM’s original pistons since 1996: molybdenum-disulphide coated skirt and Japanese rings. Its two-stroke pistons are cast from an 18 % silicon alloy. Its four-stroke pistons are forged from 2618 alloy.

When should you replace the piston rings?

Harder starting, loss of power, blue smoke, oil consumption or a knock when cold: these are the signs of a tired top end.

Recommended hours for a top-end rebuild (manufacturer recommendation for the KTM EXC-F, Husqvarna FE 2017-2023):

• Racing: every 70 h.
• Leisure: every 135 h.
• KTM SX-F, Husqvarna FC 2016-2022: racing: every 50 h.

Specifications and fitting tips

• Manufacturer part number: 590278000003

Cross-Mania tip: Check the ring end gap in the cylinder before fitting and respect the fitting direction (mark facing up).

Also needed with this part

• Piston : VERTEX · PROX
• Top-end gasket kit : MOOSE · TECNIUM
• 2-stroke oil : LIQUI MOLY 10W40 1 L · MOTUL 10W50

Compatibility

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

Fits:
GAS GAS ECF 250 2023
GAS GAS ECF 250 2022
GAS GAS ECF 250 2021
GAS GAS MCF 250 2025
GAS GAS MCF 250 2024
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
HUSQVARNA FE 250 2023
HUSQVARNA FE 250 2022
HUSQVARNA FE 250 2021
HUSQVARNA FE 250 2020
HUSQVARNA FE 250 2019
HUSQVARNA FE 250 2018
HUSQVARNA FE 250 2017
KAWASAKI KX 250 2022
KAWASAKI KX 250 2021
KTM EXCF 250 2023
KTM EXCF 250 2022
KTM EXCF 250 2021
KTM EXCF 250 2020
KTM EXCF 250 2019
KTM EXCF 250 2018
KTM EXCF 250 2017
KTM EXCF 250 2016
KTM EXCF 250 2015
KTM EXCF 250 2014
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 SXF 250 2015
KTM SXF 250 2014
KTM SXF 250 2013