485M07050 Piston Kit .020 for Suzuki RM250 1982-1985 70.50 mm

Piston Kit for Suzuki RM250

This Wiseco 485M07050 piston kit is a 0.020 oversize replacement assembly sized at 70.50 mm for the Suzuki RM250, giving a worn top end a fresh bore match.

Overview

This piston kit is a top end rebuild assembly for the Suzuki RM250, sized 70.50 mm at 0.020 oversize. It replaces the worn piston in the cylinder and works with the matching bore size to restore compression and sealing. Built for riders rebuilding a two-stroke motocross top end at home or in a shop.

Built For Performance

• 0.020 oversize sizing at 70.50 mm for a lightly refreshed cylinder
• Forged piston construction for strength under high rpm loads
• Kit format that includes the piston and matching components
• Sized to the RM250 top end for a direct fit on the specified bore
• Intended for two-stroke motocross use

Fits These Machines

• for Suzuki RM250, 1982
• for Suzuki RM250, 1983
• for Suzuki RM250, 1984
• for Suzuki RM250, 1985

On-The-Job Use

• Top end rebuilds after a piston seizure or worn ring
• Routine motocross engine refresh at the end of a season
• Cylinder hone jobs matched to a 0.020 oversize piston
• Restoring compression on a tired Suzuki RM250 engine

Specs At A Glance

Good To Know

Q: Does this piston kit require boring the cylinder? A: This is a 0.020 oversize kit, so the cylinder must be bored or honed to suit the 70.50 mm piston before assembly. Confirm your bore size and piston clearance before ordering.

Q: What else should be replaced during this job? A: A top end rebuild with this piston kit typically calls for a fresh ring, pin, and bearing, plus a new gasket set. Check the cylinder plating and clearance to the piston before reassembly.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.