Transmission Undercutting:Being on the race track is a lot of fun and at the same time serious business, “I am in the top end of 5th gear and fully pegged on the throttle, all of a sudden it goes into 4th gear or a false neutral” Yes very common and this is why we have transmissions on the shelf for the fast exchange program .
The Yamaha engine uses head bolts instead of the preferred stud arrangement. When engines are subjected to bigger bores, higher compression ratios, etc. the stock head bolts are not up to the task. Blown head gaskets are the result.(This is why Yamaha Recommends to replace the OEM Head bolts after removing “One and Done”)
The Yamaha YZFR-3 R-3 shift shaft spacer is an essential component designed to protect the shift shaft from disengaging the shift star. It is crafted using high-quality 6061 T-6 aerospace aluminum, ensuring durability and reliability. Manufactured with precision by Spears Racing Products.
$12.99 / $9.99
Kawasaki ZX400/ZX4RR stainless Steel GP 4 Line Kit offers compact mounting by having one line off the master cylinder and then splitting into two lines at the lower triple clamp. The lower lines will route in front of the forks just like the brake lines we make for GP race teams.
The Misano Fork Cartridge Kit provides increased front end feel, traction, and therefore faster track times. Every kit is custom-tailored to your body weight and riding style, while easy adjustment points on the fork tops enable you to fine-tune the compression, rebound, and preload to ensure you can extract the most performance out of your suspension setup.
These 20mm diameter pistons with oil passages increase adjustability in compression and rebound damping
Spears Enterprises/Spears Racing Is the North American Distributor of HM Products.
SATO RACING ‘Race Concept’-edition Rear Sets are pure, no-compromise racing rear sets designed for track-only bikes.Japan’s most luxurious answer to your motorcycle foot control needs. Race inspired and race tested-$519.99/$609.98
BONAMICI Fully Adjustable 32mm offset Clutch Lever With perch designed and engineered by The staff in Italy and is machined from solid aluminum with a foldable lever aerodynamic designed for better airflow – $269.99
Vesrah Brakes is a Japanese company based in Tokyo Japan Their high-performance racing brake pads give you powerful braking at the track and are used by many professional road race teams. This is the pad that started the revolution in braking technology.
Kawasaki Ninja ZX400rr, the Brembo Racing Z04 compound was developed specifically for racing and designed to provide maximum performance in the most extreme competitions, this material are its high friction and consistent efficiency, especially at high disc temperature
Gregg Spears is the President, founder and team manager of Spears Enterprises/Spears Racing.
He has 45 years of experience in the motorcycle Industry, including 14 years with the San Jose Police Department as Lead Technician. 35 of the 42 years, Spears has been the leader in motorcycle maintenance, 30 years of motorcycle roadracing support and team management with Spears Enterprises/Spears Racing. Being a dominant racing force in California, Spears Racing has earned several championships at the class, state, regional, national level and World Level and is recognized as one of the first Dynojet Power Commander tuning centers in the world. Spears graduated from high school in 1977 and went to work for the San Jose Police Department as its Lead Motorcycle Technician. It was soon apparent that his attention to detail was valuable to the industry, and decided to start working on motorcycles in his off-hours. Soon he found an overwhelming response to his talents, and in 1980 Spears Enterprises was born with $200.00 and a toolbox. Working from his carport and making house calls, Spears soon found a need for a total motorcycle repair facility.
In 1991 after leaving the San Jose Police Department, Spears Enterprises was opened in Campbell, California. Working as a sole proprietor, business was overwhelmed with customers and soon he had to hire employees to meet the demand of the workload. Long hours and relentless dedication to his customers led the business to grow, and by 1995 Spears Enterprises expanded by opening a second location. By this time the business had established itself as the leader in police motorcycle maintenance, having as many as 12 different police departments relying on Spears to meet their demands.
Working with specific roadracers, Spears Racing became a recognized force in AFM,AMA, CCS, WERA, AHRMA, LRRS and MotoAmerica competitions. Spears Racing has also expanded their efforts to include several racing venues across the U.S. and into Australia, Ireland, Germany, New Zealand, and the United Kingdom winning numerous International Championships while continuing to expand their racing support in the years to come.
In the summer of 2015 one of their Sponsors assembled a racing team called Emerald Roadracing, to run in the coveted race called “Isle Of Man TT.” With long hours and great dedication of rider and team they were able to finish 9th over all in the “lightweight/Supertwins” class on a Spears Racing powered Kawasaki ER650.
Also in that year another Race team based out of Germany ran the multi race German TT series, with a lot of dedication,long days and nights, Team NK Motors with rider Felix Klinck came away with the over-all Championship on a Spears Racing Based Kawasaki ER650.