- New
Wössner Forged Piston for BETA RR 300, RR 300 2T RACE, RR 300 2T X-PRO, XTRAINER 300 2022-2027
€219.90
Tax Included
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.
WOSSNER offers this piston kit for BETA RR 300, RR 300 2T RACE, RR 300 2T X-PRO, XTRAINER 300 2022-2027. The piston slides in the cylinder and takes the force of the air-fuel combustion, passing it to the connecting rod and crankshaft.
Why choose a forged piston?
Instead of simply being cast, a forged piston is hot-pressed under very high pressure and then machined: its metal is denser and free of air pockets.
- Stronger when hot: it copes better with high revs, overheating and detonation.
- Lighter for the same strength: less stress on the connecting rod and bearings.
- Good to know: depending on the alloy, it expands a little more and is fitted with more clearance; slight noise when cold is normal.
- Why does it cost more? Forging tools, full machining and surface treatments cost more than simple casting.
Why choose WOSSNER?
Wössner has forged its own pistons since 1994: Molykote-coated skirt to reduce friction and ease running-in, kit supplied complete with rings, pin and clips.
When should you replace the piston on your BETA XTRAINER 300?
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 Beta RR 250 / 300 two-stroke):
- Normal use: every 60 h.
- Racing: no Beta figure; Cross-Mania guideline: compression check at around 30 h.
Specifications and fitting tips
- Material: Aluminium
- Piston compression: Standard
- Piston type: Forged
- Rings Quantity: 2
- Stroke: 2T
- Forged piston
Available in several sizes: choose the one that matches your cylinder (stamped size or measured bore). Diameters: A = 72.95 mm, B = 72.96 mm, C = 72.97 mm.
Cross-Mania tip: Measure the cylinder bore before ordering: the piston must match your cylinder size. Follow the manufacturer's break-in procedure and replace the top-end gaskets at the same time.
Also needed with this part
- Top-end gasket kit : ATHENA
- Spark plug : NGK 95476 · NGK 5122
- 2-stroke oil : LIQUI MOLY 1 L 3065 · LIQUI MOLY 1 L 3063
- Air filter : HIFLO FILTRO · TWIN AIR
Compatibility
Check the exact model and year of your bike in the list below before ordering.
Fits:
BETA RR 300 2024
BETA RR 300 2023
BETA RR 300 2022
BETA RR 300 2T RACE 2026
BETA RR 300 2T RACE 2025
BETA RR 300 2T X-PRO 2026
BETA RR 300 2T X-PRO 2025
BETA XTRAINER 300 2027
BETA XTRAINER 300 2026
BETA XTRAINER 300 2025
BETA XTRAINER 300 2024
BETA XTRAINER 300 2023
BETA XTRAINER 300 2022
8324DA
1 Items
Specific References
Click on your bike to see all compatible parts.
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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.
Wössner Forged Piston for BETA RR 300, RR 300 2T RACE, RR 300 2T X-PRO, XTRAINER 300 2022-2027
€219.90
Tax Included