WISECO piston kit with top-end gaskets for SUZUKI RM 125 from 1991 to 1996 - PK1321

WISECO offers this piston kit with top-end gaskets for SUZUKI RM 125 from 1991 to 1996. 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 on your SUZUKI RM 125?

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

• Contents: Pro-Lite Piston, Ring Set, Wrist Pin, Circlips, Bearing, Gaskets
• Bore: 55.50 mm
• Oversize: +1.50 mm
• Displacement: 123 cm³
• Piston diameter: 55.46 mm
• Stroke: 54.00 mm
• Complete piston kit with pistons, rings, pins, circlips and top end gasket kit for a whole engine

Cross-Mania tip: Measure the cylinder bore before ordering: the piston must match your cylinder size. Follow the manufacturer's break-in procedure.

Also needed with this part

• Spark plug : NGK 4492 · NGK 3230
• 2-stroke oil : LIQUI MOLY 1 L 3065 · LIQUI MOLY 1 L 3063
• Air filter : TECNIUM 0417 · TECNIUM 0330

Compatibility

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

Fits:
SUZUKI RM 125 1996
SUZUKI RM 125 1995
SUZUKI RM 125 1994
SUZUKI RM 125 1993
SUZUKI RM 125 1992
SUZUKI RM 125 1991