Restore peak compression and dependable power with this Piston Kit OS 0.50 (66.5mm bore) designed for Suzuki LT230 and LT250 engines. Specifically sized for the LT230 (1985 - 2002) and LT250 (1985 - 2014) platforms, this kit brings OEM-style performance at a portion of the cost. The precise 66.5mm bore ensures a true seal, smooth operation, and reliable cold-starts, so your quad still feels strong on trails and jobs alike.

Engineered as a cost-effective aftermarket replacement, this OS oversize kit targets the common wear-and-tear that dulls throttle response and compression over time. With a +0.50mm oversize to restore bore condition, it supports consistent ring seal and combustion efficiency, making it a trustworthy choice for trail-riding and hard-working farm use where reliability matters most.

What's Included

This kit includes the core components needed to refresh the top end on LT230/LT250 engines. In the box you’ll find:

• Piston
• Rings
• Wrist Pin
• Circlips

Note: Gaskets and other top-end components are not included in this piston kit.

OEM & Aftermarket Cross-Reference Information

These cross-references reflect official Suzuki part numbers and common aftermarket cross-refs used to identify compatible piston kits for LT230/LT250 engines.

Fitment

Fitment data reflects the LT230 and LT250 engine family as outlined in OEM cross-reference details and catalog listings for this oversize piston kit. These ranges align with common LT230/LT250 rebuild applications across the model years referenced above.

Specifications

Key specifications surface from OEM cross-references and aftermarket listings, including the 66.50mm bore with +0.50mm oversize, cast aluminum alloy construction, and displacement guidance for the LT230/LT250 family.

Installation Notes

• Thoroughly inspect the cylinder bore for wear or scoring; hone or re-machine if needed to achieve proper ring seating and end-gap integrity.
• Install piston rings with correct orientation and stagger ring gaps to avoid alignment with piston scoops; ensure end gaps are within spec (refer to service manual for your LT230/LT250 variant).
• Lubricate the piston and rings with assembly oil or engine oil before installation to prevent dry startup.
• Secure the wrist pin with the included circlips, making sure there is proper side-side clearance and no clip exposure beyond the bore.
• Check ring end gaps and verify piston orientation marks before sliding the piston into the bore; rotate the crank to confirm smooth movement with no binding.
• Re-torque or verify torque specs for any attached components when completing the top-end refresh, and ensure correct valve and cam timing if you’re performing a broader head work.