PROX Piston Kit KTM 520/525SX-EXC '00-07 and 525XC ATV with Part Number 01.6521.A

PROX pistons are precision machined on the latest, state of the art CNC equipment. The same low-expansion, low-friction piston alloy is used as is used for all major Japanese engine manufacturers. PROX Piston Kits are a first class solution to replace the original piston in your Motorcycle, Scooter, Moped, ATV, Personal Watercraft, etc. PROX Piston Kits for sleeved cylinders are available in standard size and a wide range of oversizes. The availability of oversizes up to 2mm significantly helps to increase the lifespan of a cylinder by offering more re-boring possibilities. PROX pistons for plated cylinders come in standard size, as well as in A, B, C, D+ oversizes. Take advantage of the additional oversizes to extend the lifespan of plated cylinders. All PROX Piston Kits are supplied complete with Piston Rings, Wrist Pin and Circlips, ready to install!

The PROX Piston Kit, part number 01.6521.A, is designed specifically for KTM models including the 520 and 525SX-EXC from 2000 to 2007, as well as the 525XC ATV. This high-quality kit ensures optimal performance and durability for your motorcycle or ATV engine. Crafted with precision, it features a piston with an compression ratio of 11.0:1, providing improved power output and fuel efficiency. The kit includes all necessary components for a complete overhaul, making it a reliable choice for both professional repairs and routine maintenance.
Constructed with durable materials, the piston kit is engineered to withstand the rigors of off-road riding and high-performance applications. Proper installation of this piston kit can help restore engine performance to factory standards, ensuring smooth operation and longevity. Whether you're rebuilding your engine or replacing worn components, this kit offers an excellent balance of quality and value.
Designed with compatibility in mind, the PROX Piston Kit is easy to install and