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Ref : PRO00454A / 1129320001
Prox

Prox forged Piston kit

Recommended retail price: 248,64 €211,30 €

Compatibility

Check that this part fits your motorcycle

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Features

PROX Forged Piston – Manufacturer Ref: 01.7365.A

Forged aluminum piston, developed for engine rebuilding of modern trail and motocross bikes. Its "flat with hollow" design respects the original combustion chamber shapes and allows for standard replacement installation. Ideal for maintaining the behavior and geometry of the cylinder head while integrating a robust part suitable for off-road use.

  • Brand: PROX
  • Compression: standard
  • Diameter: Ø 87.960 mm (oversize letter A)
  • Material: forged aluminum
  • Specificity: flat with hollow
  • Category: Cross — designed for rebuilding and refurbishment

Part compatible with BETA RR 390 4T models (including listed Racing and Enduro versions). This piston integrates into an engine rebuild to restore original tolerances and ensure a good mechanical base when replacing the piston assembly. Check the piston/ring fit and bore specs before installation to ensure a proper fit.