Yamaha R3 Standard Bore Piston Rings Spears Racing CP Pistons
Piston Rings form the critical seal between the piston and the cylinder wall.
2 SETS REQUIRED FOR 1 Engine
14 in stock
Yamaha R3 Standard Piston Rings set is designed/made for the Spears Racing SP01-320 CP Pistons and form the critical seal between the piston and the cylinder wall. A delicate balance exists between proper sealing for maximum power and minimum blow by, and the correct amount of pressure on the cylinder wall to minimize drag which can lead to power loss and excess wear. Additionally the rings help to carry oil up and down the cylinder wall. Fresh rings are a key component when building a high performance engine. We offer a selection of rings for every piston style and diameter. If you are unsure what rings you require for your stock or overbore pistons, please contact us before ordering.
Spears Racing’s Yamaha R3 Race Pistons High Compression 320 kit. This is the new 2 Ring FSR Slipper Skirt forging Piston. Drop in high compression kit includes pistons, rings, lighter wrist pins, cir clips . The compression is 13 to 1. Dome features smooth flowing radius, under crown machining to lessen the overall weight. Anti Det. Grooves, Acc Grooves, Double Broach Grooves for extreme applications including professional competition.
Spears race pistons with the State of the Art CNC Machining and manufacturing alliances with CP Carrillo for decades. Spears Racing continuous committed to excellence to advance as the industry changes. This commitment has resulted in more forgings specific to certain applications, proprietary treated wrist pins and piston rings manufactured only for us. Each of these aspects has been put through stringent research and development stages to ensure that our product will exceed your standards.
At the forefront of performance, piston manufacturing has been a result of continuous research and development of unique materials, piston designs and technologies. Utilizing State of the Art CNC machines for manufacturing, along with purpose-designed forgings, while being able to maintain exacting specifications on each and every piston – holding tolerances to millionths of an inch
Spears Racing Piston Kits have been winning races and Championships all over the world for over 4 decades. Spears Racing pistons have been in several of the race wins in close course racing and in road circuits in Europe and has won the Isle Of Man TT Twins several times.
“Preferred Performance” Pistons Kits By Spears Racing
Yamaha R3 Race Pistons High Compression Yamaha R3 320 kit Includes the Following:
Large Valve Pockets for 1mm over valves
Weight:131 g per piston
Pistons x 2
Wrist Pins x 2
Yamaha R3 Standard Piston Rings x 2
Cir Clips x 4
Proper end gaps may need to be set before installation.
FOR USE IN CAST IRON AND NIKISIL CYLINDER BORES