Triumph 500 T100 Late 69mm Piston Set Complete w/Grant Piston Rings 1967-74 PN# 70-6884 E6884 70-6893 70-6894 US

Introducing our premium Triumph 500 T100, T100C, and T100R Engine Pistons and Grant Rings Set – an excellent combination in restoring or upgrading your classic Triumph 500cc engine.

Here is a complete piston and piston ring set for the later unit-construction Triumph 500 models that delivers top performance at an economical price. The cast JCC/Emgo reproduction pistons have been the industry standard for street use for years. We have combined the piston set with a set of high quality Grant piston rings, featuring a one-piece oil control ring for easy fitment. Available in standard and oversizes up to .060″. The 9:1 compression ratio pistons are suitable for the T100 cylinder heads from 1967 through 1974 with the 1-17/32″ inlet valves and enlarged combustion spheres. Not recommended for the earlier unit-construction Triumph 500 models fitted with the “squish-band” cylinder head.

Marketed by Emgo, the JCC pistons are precision manufactured to exacting standards and include the wrist pins and circlips. The US-made cast-iron Grant piston rings are a complete set of (4) compression rings and (2) oil control rings, enough for both pistons. The compression rings are marked with “top”, indicating the orientation in the piston ring grooves.

The pistons must be fit to the cylinder barrels when overboring. The machinist measures the pistons and performs the cylinder boring and finish honing to a specified clearance. The piston rings are checked and adjusted for the proper end gaps prior to fitment to the pistons. It is advisable to replace all of the top end gaskets and sealing washers when pistons and piston rings are renewed.

Failure to achieve proper fitment of the pistons and piston rings can result in a noisy engine, with high oil consumption. Following the proper installation procedures, as outlined in the factory workshop manual is recommended when fitting new pistons and rings. This job requires specialized tools and skills and may be best left to a professional to carry out the task.

High-Quality Pistons

Our Triumph 500 pistons are precision-engineered to meet or exceed original specifications:

• Manufactured from high-grade aluminum alloy for optimal strength and heat dissipation
  
• Precision-machined to exacting tolerances for improved performance and reliability
  
• Designed specifically for Triumph 500cc models, including T100, T100C, and T100R
  
• Available in multiple oversizes to accommodate your specific engine needs
  
• 9:1 compression ratio for improved power output
  
• Slipper-style design for reduced friction and improved efficiency
  

Grant Rings

Paired with these exceptional pistons are the renowned Grant Rings, known for their quality and durability:

• Manufactured by Grant a leading piston ring manufacturer since 1922
  
• Excellent sealing properties for enhanced compression and reduced oil consumption
  
• Quick and consistent break-in period for optimal performance
  
• Durable construction to withstand the demands of vintage engines
  
• Clear markings for hassle-free installation
  

Compatibility and Specifications for Triumph 500 Pistons and Grant Rings:

This piston and ring set is specifically designed for:

• Triumph 500cc models produced between 1958 and 1966
  
• Compatible with various Triumph motorcycles, including the T100, T100C, and T100R
• Weight-matched pistons for balanced performance
  
• Complete set includes pistons, Grant rings, wrist pins, and circlips

Need a set for pre 1967 500 Twins? We have them, PN# CP179

Please use drop down menu to select size.

Additional Items:

• Need just the pistons? Check here.
• Need just the rings? Check here.