VERTEX Cast Replica Piston Kit for TM RACING EN 300, MX 300 2006-2022

VERTEX offers this piston kit for TM RACING EN 300, MX 300 2006-2022. 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 cast piston?

A cast piston is made by pouring liquid aluminium into a mould: it is what most manufacturers fit as standard, especially on two-strokes.

• High-silicon alloy: it expands little, is fitted with tight clearance and stays quiet when cold.
• Good wear resistance of the skirt and ring grooves.
• Lower price than a forged piston, for OEM quality in normal use.
• Limit: less tolerant of overheating and highly tuned engines.

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.

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 compression: Standard
• Rings Quantity: 1
• Stroke: 2T

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 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 2022
TM RACING MX 300 2021
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