NOS Wellworthy Piston Ring Set R23020 +.020 Triumph Trident T150 T160 BSA Rocket 3

• Brand: Wellworthy (Genuine NOS)
• Part Number: R.23020 / R23020
• OEM Cross-Reference: Triumph 99-3782 / 99-3783
• Size: +.020" Oversize (for 67.5mm / 2.657" bore)
• Application: Triumph Trident T150, T160, X75 Hurricane, and BSA A75 Rocket 3 (1968–1976)
• Set Contents: Enough rings for ONE (1) Piston (2 Compression Rings, 1 Oil Control Ring)
  • Note: For a full engine rebuild of a 3-cylinder machine, you will need 3 of these sets. 

• Compression Ring End Gap: Suggested range of .010" to .014" (standard maintenance manual spec). Modern industry standards for vintage British bikes often accept up to .020" without loss of performance.
• Minimum Gap Safety: Never install with a gap less than .0035" per inch of bore (approx. .009" for this application) to avoid engine seizure.
• Ring Orientation: Top compression rings typically feature a PVD chromium nitriding face; the second ring often has a black phosphate coating. Always install with any "Top" or "Size" markings facing the piston crown.
• Gap Staggering: Space the ring gaps 120 degrees apart around the piston to minimize compression blow-by.

selling as pictured.

more than welcome to pick up at shop in butler pa & save shipping.

031626 jy