Wössner Forged Piston for TM RACING EN 300, MX 300 1997-2020

WOSSNER offers this piston kit for TM RACING EN 300, MX 300 1997-2020. 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 TM RACING MX 300?

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

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

• Material: Aluminium
• Piston type: Forged
• Rings Quantity: 1
• Stroke: 2T
• Forged piston
• Anti friction coated skirt

Available in several sizes: choose the one that matches your cylinder (stamped size or measured bore). Diameters: A = 71.93 mm, B = 71.94 mm, C = 71.95 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

• 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:
TM RACING EN 300 2020
TM RACING EN 300 2019
TM RACING EN 300 2018
TM RACING EN 300 2017
TM RACING EN 300 2016
TM RACING EN 300 2015
TM RACING EN 300 2014
TM RACING EN 300 2013
TM RACING EN 300 2012
TM RACING EN 300 2011
TM RACING EN 300 2010
TM RACING EN 300 2009
TM RACING EN 300 2008
TM RACING EN 300 2007
TM RACING EN 300 2006
TM RACING MX 300 2020
TM RACING MX 300 2019
TM RACING MX 300 2018
TM RACING MX 300 2017
TM RACING MX 300 2016
TM RACING MX 300 2015
TM RACING MX 300 2014
TM RACING MX 300 2013
TM RACING MX 300 2012
TM RACING MX 300 2011
TM RACING MX 300 2010
TM RACING MX 300 2009
TM RACING MX 300 2008
TM RACING MX 300 2007
TM RACING MX 300 2006
TM RACING MX 300 2005
TM RACING MX 300 2004
TM RACING MX 300 2003
TM RACING MX 300 2002
TM RACING MX 300 2001
TM RACING MX 300 2000
TM RACING MX 300 1999
TM RACING MX 300 1998
TM RACING MX 300 1997