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Motorbike parts and tools

Engine parts & cables

Upper engine

Piston kit Prox forged

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Prox forged Piston kitRef : PRO00449A / 1129318002

Recommended retail price:205,92 €?

185,30 ^€

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Description
Compatible motorbikes
Questions and answers

DescriptionProx forged Piston kit

Product details :

Features

Manufacturer reference: 01.6348.B

PROX forged piston, specially sized for 250 cm3 cross engines during reconditioning. Machined from aluminum, this piston features an oversize of +0.01 mm (letter B) and a precise diameter of Ø 80.970 mm, offering compatibility with bores adjusted according to this wear clearance. With standard compression, it allows for settings close to the original equipment during a rebuild.

Type: Forged piston
Material: Aluminum
Diameter: Ø 80.970 mm (oversize +0.01, letter B)
Compression: Standard
Usage: Engine reconditioning for cross

Designed for riders and workshops looking for a replacement part with original dimensions, this PROX piston integrates into high-performance interventions on 250 4T engines. Ideal for repairs after wear or during a complete rebuild, it is particularly suitable for the models listed below as examples of fitment:

KTM 250 SX-F ADAMO EDITION (2025)
HUSQVARNA FE 250 (2024)
GAS GAS MC 250 F (2024)

Be sure to check the entire bore/cylinder, rings, and pin size during installation to ensure proper clearance and good longevity of the piston/cylinder head assembly.

Technical information :

Reference

PRO00449A / 1129318002

Oversize

+0.01

Compression Ratio

14.5:1

Diameter Ø (mm)

80.970

Engine

Piston diameter

Ø 80,970 mm