Wiseco 552M06850 Pro-Lite Forged Piston Kit Bore Oversize - 68.5mm 1.50mm

The Wiseco 552M06850 is a Pro-Lite series forged 2-stroke piston kit machined to a 68.5mm bore diameter (1.50mm / .060" oversize). Built for the demands of ATV racing and aggressive trail riding, this piston delivers the strength and precision that serious riders require. Must use stock thrust washers.

Forged Construction Advantage:

• Forged from high silicon, low expansion aluminum for superior strength, reduced weight, improved heat transfer, and longer service life
• Forgings feature condensed grain structure aligned to part geometry, producing higher mechanical properties and resistance to impact and fatigue
• Unlike cast pistons — which are brittle and prone to catastrophic failure — forged pistons withstand the abuse of high-performance motorsport applications
• Each forging is engineered to optimize the strength-to-weight ratio and maximize performance output

USA Manufacturing:

• All pistons are forged in-house at Wiseco's facility in the USA
• All forge tooling is produced domestically
• Every aspect of the manufacturing process is controlled, from raw bar stock through skirt coating of finished parts
• Diamond-turned finish from CNC computer-controlled turning centers ensures a perfect finish with no size variation

Kit Contents:

• Forged 2-stroke piston — 68.5mm bore
• Piston ring set (68.5mm)
• Piston pin — 18mm x 2.303", non-chromed
• Round wire pin locks — 18mm (pair)

Specifications:

• Bore Size: 68.5mm (1.50mm / .060" oversize)
• Piston Pin Diameter: 18mm
• Series: Pro-Lite
• Application: 2-stroke ATV

Wiseco oversize pistons are compatible with cast iron lined cylinders and can also be used in resleeved chrome, Nikasil, and boron composite cylinders. The Pro-Lite piston is the ideal choice for riders who demand a proven balance of durability and performance in every rebuild.