SPI .020 Over Bore Piston Kit for Yamaha VK540, VK540 II & VK540 III 73.5mm

SPI .020 Over Bore Piston Kit for Yamaha VK540

This .020 over bore piston kit for Yamaha VK540, VK540 II, and VK540 III models is a replacement piston set with a 73.5mm bore size designed to restore engine performance after a cylinder bore-out.

Overview

This .020 over bore piston kit is a high-quality aftermarket replacement for Yamaha VK540 snowmobile engines, providing the necessary piston and rings to rebuild the top end. It is suitable for VK540, VK540 II, and VK540 III models, ensuring a reliable fit for these machines.

Built For Performance

• Precision-machined .020 oversize piston for accurate cylinder fit
• Includes piston rings for proper sealing
• Cast from durable alloy for long service life
• Designed to meet OEM specifications
• 73.5mm bore diameter matches standard oversize for VK540

Fits These Machines

• for Yamaha VK540
• for Yamaha VK540 II
• for Yamaha VK540 III

On-The-Job Use

• Used during engine top-end rebuilds on Yamaha snowmobiles
• Ideal for restoring compression and power after cylinder wear
• Suitable for trail riding and recreational snowmobiling
• Commonly installed when boring cylinders to eliminate scoring

Specs At A Glance

Good To Know

Q: Is this piston kit compatible with stock cylinders? A: This .020 over bore piston kit is designed for use with cylinders that have been bored to the appropriate oversize; it is not intended for standard bore cylinders.

Q: Does this kit include wrist pins or circlips? A: Typically, this piston kit includes the piston and rings; wrist pins and circlips may be sold separately, so check your existing components.

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