234M07000 Wiseco Std Piston Kit 70.00mm for Yamaha MX250 1978-1980

Wiseco Std Piston Kit for Yamaha MX250

Standard bore piston kit for Yamaha MX250 with a 70.00 mm bore, cross-referencing Wiseco 234M07000 for top-end rebuilds that keep the original cylinder size.

Overview

This Wiseco piston kit for Yamaha MX250 provides a standard bore replacement piston for top-end service. Built for riders and mechanics who want to keep the stock 70.00 mm cylinder and simply refresh the piston, rings, and related parts. The kit carries the Wiseco 234M07000 number, making it easy to confirm before you buy.

Built For Performance

• Standard 70.00 mm bore size matching the original cylinder
• Wiseco part number 234M07000 for easy cross-referencing
• Forged piston construction suited to two-stroke MX250 use
• Kit format intended for a complete top-end rebuild
• Machined ring land and skirt dimensions for consistent clearances

Fits These Machines

• for Yamaha MX250 1978
• for Yamaha MX250 1979
• for Yamaha MX250 1980

On-The-Job Use

• Top-end rebuilds on a cylinder still suited to standard bore
• Routine piston and ring replacement at the stock size
• Motocross and trail use where a durable piston is needed
• Shop and home-mechanic engine refreshes

Specs At A Glance

Good To Know

Q: When should I choose a standard piston over an oversize piston? A: A standard piston is used when the cylinder still measures within spec for a 70.00 mm bore and does not need overboring. Q: How do I know this fits my Yamaha MX250? A: Match the part number 234M07000 and the 70.00 mm standard bore to your model and year, and verify your serial number before ordering.

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