Here is a complete piston and piston ring set for the Triumph 650 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″. Pistons are 9:1 compression ratio condition.
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.
Key Features:
- Precision-Engineered Pistons: These pistons are a direct replacement for your Triumph 650cc engine.
- Grant USA Piston Rings: Grant rings provide excellent oil control and compression.
- Authentic Design: Modeled after original Triumph factory pistons but improved with modern manufacturing techniques for increased durability and reliability.
- Versatile Application: Suitable for various Triumph 650 models, including Bonneville T120, Tiger T110, and Trophy TR6 variants.
- High-Quality Materials: Constructed from premium aluminum alloy for excellent heat dissipation and longevity.
Technical Specifications of Triumph 650 Bonneville Tiger Trophy Pistons and Grant Rings:
- Bore Sizes: Standard, +.020, +040, +.060 (confirm your specific engine requirements)
- 9.5:1 compression ratio for most applications
- Complete set includes pistons, wrist pins, and circlips
Measurements and cylinder preparation are recommended to be carried out by a qualified technician and/or machinist. Specialized tools and skills are required for proper piston and ring replacement. Specifications for piston clearance and piston ring end gaps are listed in the factory workshop manual, subject to various Triumph service bulletins that have been issued over the years.
Additional Items:
- Need just the pistons? Check here.
- Need just the rings? Check here.
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