Featured Products

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 .

Prevent fuel sloshing and keep the Motorcycle handling predictably with our Fuel Tank Safety Foam Blocks. When cornering or hard acceleration and braking, fuel sloshing about in the tank produces unpredictable weight transfer and may adversely affect your handling.


SKF Fork Seals

SKF Fork Seals Experience the ultimate riding feeling. The riding feeling and durability are two decisive factors when designing seals for front forks in motorcycles. Especially in applications such as Road racing, and small diameter forks and where the sealing requirements are very demanding.

$39.99 per set

This Japanese manufacturer racing clutch kit has a 20% increased clutch surface area which mean more surface area +less wear and better high performance durability          $34.99/$154.98.

Ninja 400/ZX400RR

Spears Racing Quick Release Key-less Locking Fuel/Gas Caps are designed, engineered and CNC machines from 6061 t-6 Aircraft grade Aluminum and has an appealing appearance.These caps are a “True Locking” Fuel Cap, unlike a lot of the others on the market, that are a twist to close with no lock. After the machining is completed the unit is finished with a stylish anodized and also comes with the Spears Racing Logo.$129.99

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.

Brembo 107A48651 Z04 Compound

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 $149.99/$139.99



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.

What our clients say

RHNorth Carolina
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Gregg, I wanted to thank you again for your help getting me the head gaskets so I could get my bike back together in time.  I ended up doing those gaskets, swapping to intake cams everywhere and a full Yosh exhaust.  The bike is a rocket ship now!  
Adam FKent, Washington
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Gregg, I've use some of your stuff before, but this is the first time I have seen it in quantity. I'm super impressed with your attention to detail. Thanks for all you do, this explains why I have heard your name mentioned for years!
JaimeSilver Spring, Maryland
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Gregg, I recently got my hands on the parts that I purchased from you. And I have to say they were packaged very carefully and for that I thank you. I will be installing them soon. It was a great pleasure doing business with you!
義明根木 Hiroshima, Japan
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Today, great products arrived safely.  Thank you a lot for stickers and candy.  You gave me a spare gasket.  You guys are the best!  The best bike life begins!
William B Scotland
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Hi Gregg Just a quick email to say how impressed I was with your service and delivery to me in Scotland. Got Parts off you a couple of months back . The service and quick response’s with emails were first class. So Thank you very much 
Jan P Norway
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Hi Gregg, Thanks for quick response of my order for the Ninja 400. Got the package in my hands 2 hours ago, here way up North in Norway and the order was submitted only three days ago.
Chis A Denver, Colorado
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Gregg When I called to tell you about my mysterious engine stalling you were quick to point out that you had a plug’n’play side stand lockout kit for just that situation. As always it arrived in a couple of days and went on in a jiffy. One less thing to worry about while on the track. I can’t tell you how much I appreciate the support that you are providing to my race program, with both your products and your knowledge - you rock!
Jay Mount Gravatt, Australia
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Gregg The parts arrived and were installed today, I’m ecstatic. Feels like a totally different bike! Cheers, Jay
Kevin R Elm, New Jersey
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Gregg,I cannot thank you enough for all of your help, support and insight. Navigating this crazy race world for a newcomer like me is not easy. It's folks like you who make it so much easier. Cheers! K
Kevin R Elm, New Jersey
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Dear Gregg, I ordered a R3 transmission a couple of months ago and I am very pleased with the result.No more dropping out of gear. Rider is more than happy, so thank you!I would like to order another set. Sending the transmission from The Netherlands is quite expensive, so please add a core fee. Looking forward to hearing from you.Kind regards,Met vriendelijke groeten,
Tracy M Tennessee
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Gregg, Just got my clutch rod and bearing for my Z400 today. I will tear into it in a couple weeks when there's no chance of a sunny day to ride. You were on the spot with replies and shipping and I appreciate it very much. Thanks again  By the way, did you put candy in with my parts?....good one!!