Yamaha YZFR3 Standard Bore High Compression Kit 320cc 2015/2021

$549.99

This engine kit is  “Approved Overbore Kit “  for MotoAmerica

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. Spears Racing Yamaha R3 Race Piston kit have been winning races and Championships all over the world, this piston designs

These Pistons make more than the Factory GYTR Pistons

SP01-320 Guidlines with Information

6 in stock

Description

Spears Racing’s Yamaha R3 Standard Bore Race Piston kit is the “Approved Piston Kit” for MotoAmerica  This is the new 2 Ring FSR Slipper Skirt forging Piston. Standard bore  high compression kit includes pistons, rings, lighter wrist pins, cir clips . The compression ratio of these pistons is 13 to 1.(We recommend the use of OEM Yamaha Head gasket) Dome features smooth flowing radius, under crown machining to lessen the overall weight. Anti Det. Grooves, Accumulator 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 Yamaha R3 Race Piston kit have been winning races and Championships all over the world, this piston designs makes more than the Factory GYTR Pistons. Spears Racing pistons have been in several of the race wins in close course racing and in road circuits in Australia, Europe, North America, South America  South Africa and has won the Isle Of Man TT Twins several times.

“Preferred Performance” Pistons Kits By Spears Racing

Yamaha R3 Standard Bore Race Piston kit High Includes the Following:

Large Valve Pockets for 1mm over valves

Weight:130 g per piston
Pistons x 2
Wrist Pins x 2
Piston Rings x 2
Cir Clips x 4

Spears Racing has been designing and making race products for decades, their continuous committed to excellence to advance as the industry changes. This commitment has resulted in more components specific to certain applications, proprietary products only manufactured  for us. Each of these aspects has been put through stringent research and development stages to ensure that our product will exceed your standards.

 

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