WISECO Forged Piston for YAMAHA TTR 125, XT 125, SCORPA TY 125, TY-S 125 F, BETA ALP 125 and GAS GAS TX 125 4T RANDONNE

WISECO offers this piston kit for YAMAHA TTR 125, XT 125, XT 125 X, SCORPA TY 125, TY-S 125 F, BETA ALP 125 and GAS GAS TX 125 4T RANDONNE 2000-2026. 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 WISECO?

Wiseco has forged its pistons in Mentor (Ohio, USA) since 1941 and controls the whole process, from aluminium bar to the friction-reducing ArmorGlide skirt coating. Its pistons are developed with Team Honda HRC in Supercross (450 class since 2018).

When should you replace the piston?

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 50 h in hard use and every 100 h for leisure.

Specifications and fitting tips

• Material: Aluminium
• Piston compression: Standard
• Piston type: Forged
• Rings Quantity: Set
• Stroke: 4T

Available in several sizes: choose the one that matches your cylinder (stamped size or measured bore).

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 : CENTAURO · MOOSE 125 L
• Spark plug : see the selection
• 4-stroke engine oil : LIQUI MOLY 10W40 1 L · MOTUL 10W50
• Air filter : TWIN AIR · HIFLO FILTRO

Compatibility

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

Fits:
BETA ALP 125 2012
BETA ALP 125 2011
BETA ALP 125 2010
BETA ALP 125 2009
BETA ALP 125 2008
BETA ALP 125 2007
BETA ALP 125 2006
GAS GAS TX 125 4T RANDONNE 2014
GAS GAS TX 125 4T RANDONNE 2013
GAS GAS TX 125 4T RANDONNE 2012
GAS GAS TX 125 4T RANDONNE 2011
SCORPA TY 125 2015
SCORPA TY-S 125 F 2016
SCORPA TY-S 125 F 2015
SCORPA TY-S 125 F 2014
SCORPA TY-S 125 F 2013
SCORPA TY-S 125 F 2012
SCORPA TY-S 125 F 2011
SCORPA TY-S 125 F 2010
SCORPA TY-S 125 F 2009
SCORPA TY-S 125 F 2008
SCORPA TY-S 125 F 2007
SCORPA TY-S 125 F 2006
YAMAHA TTR 125 2026
YAMAHA TTR 125 2025
YAMAHA TTR 125 2024
YAMAHA TTR 125 2023
YAMAHA TTR 125 2022
YAMAHA TTR 125 2021
YAMAHA TTR 125 2020
YAMAHA TTR 125 2019
YAMAHA TTR 125 2018
YAMAHA TTR 125 2017
YAMAHA TTR 125 2016
YAMAHA TTR 125 2015
YAMAHA TTR 125 2014
YAMAHA TTR 125 2013
YAMAHA TTR 125 2012
YAMAHA TTR 125 2011
YAMAHA TTR 125 2010
YAMAHA TTR 125 2009
YAMAHA TTR 125 2008
YAMAHA TTR 125 2007
YAMAHA TTR 125 2006
YAMAHA TTR 125 2005
YAMAHA TTR 125 2004
YAMAHA TTR 125 2003
YAMAHA TTR 125 2002
YAMAHA TTR 125 2001
YAMAHA TTR 125 2000
YAMAHA XT 125 2010
YAMAHA XT 125 2009
YAMAHA XT 125 2008
YAMAHA XT 125 2007
YAMAHA XT 125 2006
YAMAHA XT 125 2005
YAMAHA XT 125 X 2010
YAMAHA XT 125 X 2009
YAMAHA XT 125 X 2008
YAMAHA XT 125 X 2007
YAMAHA XT 125 X 2006
YAMAHA XT 125 X 2005