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Ref : PRO00421A / 1117579
Prox

Prox Valve stem seal

Recommended retail price: 3,22 €2,70 €

Compatibility

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Features

PROX Valve Stem Seals (manufacturer part number: 35.VS029) — sealing rings designed for motocross engines where sealing and consistent performance are crucial. Manufactured to the same tolerances as original equipment by recognized OEM workshops in Japan (NOK, ARS), these seals use high-quality materials intended to ensure low friction on the valve stem and reliable sealing at the guide.

  • Usage: motocross / off-road — suitable for engines subjected to high demands and high RPMs.
  • Function: prevent oil leaks along the valve stems while maintaining original clearances and tolerances.
  • Construction: premium materials and machining in accordance with OEM specifications for direct replacement fitting.
  • Indicative compatibility: among common applications are modern 350 cc models such as KTM 350 SX-F (2025), Husqvarna FC 350 (2025), and GAS GAS EC 350 F (2024).

Whether for an engine overhaul or a restoration after competition, the PROX 35.VS029 seals provide a standardized solution designed for the motocross world — ease of installation and compliance with manufacturer requirements.

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