Prox Complete cast rib A Piston kitRef : 9559DA / 1094504001

PROX Cast Piston (manufacturer part number: 01.6105.A) designed for 85 cc motocross engines. Aluminum piston, forged by casting, with a dome-shaped head and a skirt treated with Mos2 to reduce friction and ensure good performance in the cylinder. Oversize type A (Ø 46.95 mm) corresponding to a slightly larger bore than standard.

• Diameter: Ø 46.950 mm (46.95 mm)
• Compression: Standard
• Material: Aluminum
• Specificity: Dome-shaped head / Mos2 skirt treatment
• Type: Cast piston, oversize A

This product is intended for riders and workshops looking for a robust replacement part that meets oversized bore specifications. The Mos2 treatment on the skirt aims to reduce the stresses on the piston-cylinder interface and facilitate break-in. The dome-shaped head influences the combustion chamber shape according to the original engine settings.

Main compatibilities:

• GAS GAS MC 85 19/16 (2025 - 85 cc)
• KTM 85 SX STD WHEELS 17/14 (2024 - 85 cc)
• HUSQVARNA TC 85 STD WHEELS 17/14 (2024 - 85 cc)

Associated parts: replacement rings: 260223, replacement clips: CP1410C, needle cage: 400412.