Featured Products

Spears Racing KTM RC390 2mm overbore engine kit

KTM RC390 OVERBORE ENGINE KIT (91mm) HIGH COMPRESSION RACE PISTON 13.0.1

Spears Racing KTM RC390 2mm overbore engine kit (91mm) high compression race piston has a compression ratio of 13.0 to 1. 

This is the new 3 Ring  asymmetrical FSR Forging made for Spears Racing by JE Pistons. This race piston  kit includes piston, rings (Steel Gas Nitride Barreled Faced), lighter tapered wrist pins, cir clips.

Dual Velocity Gas Ports are the combination of the two traditional gas ports, bringing you the best of both worlds. Our patent-pending design brings positive gas pressure to the back side of the top ring, without a gas port that will clog from carbon build-up.

The kit features JE’s proprietary ceramic gold coating (.0015” thick) on the piston crowns, engineered for unmatched durability and performance:
  • Heat Reflection: Rejects combustion heat, reducing thermal stress on the piston crown.
  • Prevents Annealing: Minimizes material softening, extending piston lifespan indefinitely under proper conditions.

 

$849.99/$1149.99  per kit

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Aluminum Captive Wheel Spacer Kits Front/Rear with new seals.

Elevate your motorcycle maintenance and performance with the Spears Racing Captive Wheel Spacer Kit. Precision-machined from high-grade 6061 aluminum, these spacers are anodized for superior corrosion resistance and enhanced lubrication properties. Each kit includes new seals for a complete, hassle-free installation.

Designed specifically for racers and track day enthusiasts, our billet aluminum captive wheel spacers streamline wheel and tire changes, eliminating the frustration of loose spacers and pinched fingers. This race-proven innovation adheres to Spears Racing’s exacting specifications, delivering reliability under demanding conditions.

Weighing 150-195 grams less than stock components, this kit reduces unsprung and rotating weight, contributing to improved handling and acceleration.
$99.99 / $289.99per kit
 
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Domino XM2 Adjustable Race Throttle Kits 

The Domino XM2 Adjustable Race Throttle Kits has several different size reels that will change how much twist is necessary for the throttle to completely open the throttle bodies on your motorcycle. The larger the reel is, the shorter the twist. Each reel size will shorten the twist by about 10 degrees.  One of these reels will be the  “best for your needs”

The included cam reel has a profile that allows the throttle to act like a sensitive, long twist throttle during the initial small throttle openings for precise control and then acts like a more aggressive short twist throttle at large throttle openings, progressively shortening the amount of twist needed to reach full throttle. 

The Domino throttle controls are all built according to the most modern production processes, solid, robust and very precise, they are the right choice as a spare part or as an upgrade to the oem throttle control of your bike

You can pick your application 

Always in stock

 

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Brembo Brake Caliper

Kawasaki Ninja 500 Brembo Brake Caliper #20516584/20516588 with Mounting Bracket 2024/Current

A special product that has been designed Spears Racing  engineering staff to a perfect fitment and has an amazing appearance you have come to  expect to see on all of the Spears Racing products.

The special mount designed for the Kawasaki Ninja 500 is made from Billet aluminum and is machined to fit and give you plenty of clearance to your Brake rotor, the mount come with 2 mounting bolts and you will use your stock OEM caliper bolts to mount this unit to your fork leg.

Several options to complete your own “Custom Look and Feel”

Brembo RCS15 Master Cylinder along with titanium fasteners ,Brembo Reservoir kit, and option out with a black or gold caliper 

Brembo Brake Caliper Spec:

Piston: 2 x 30 / 2 x 34 mm

$249.99/$1009.95

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Spears Racing Motorcycle Titanium Fasteners Kits

Grade 5, also known as Ti6Al4V, Ti-6Al-4V or Ti 6-4, is the most commonly used alloy. It has a chemical composition of 6% aluminum, 4% vanadium, 0.25% (maximum) iron, 0.2% (maximum) oxygen, and the remainder titanium.It is significantly stronger than commercially pure titanium while having the same stiffness and thermal properties (excluding thermal conductivity, which is about 60% lower in Grade 5 Ti than in CP Ti). Among its many advantages, it is heat treatable. This grade is an excellent combination of strength, corrosion resistance, weld and fabricability

 

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Spears Enterprises/Spears Racing  Is the North American Distributor of HM Products.
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CHAIN HOOK/CHAIN HOLDER

The “Chain Hook/Holder”© is an innovative designed By Spears Enterprises/Spears Racing and it is made from 5052 Aluminum Alloy and is tumbled to a silk finish for a fine natural appearance
The Hook/Holder© is to assist the race Team Mechanic,racer or rider once you have removed your rear tire/wheel assembly from your Bike,you no longer need to let your drive chain just fall onto the dirt/asphalt  that can cause early wear to the chain and the drive sprocket

$49.99/$39.99

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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

 
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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.

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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

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WHO WE ARE

SPEARS RACING

Gregg Spears is the President, founder and team manager of Spears Enterprises/Spears Racing.

He has 47 years of experience in the motorcycle Industry, including 14 years with the San Jose Police Department as Lead Technician. 40 of the 47 years, Spears has been the leader in motorcycle maintenance, 35 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.

Spears Racing has shifted its business focus to manufacturing and supplying high-quality race products for smaller displacement motorcycles, offering a wide range of over 800 products, including championship-designed engine kits and purpose-built race parts. Their dedication to customers’ service and product quality seems to be a key priority.

What our clients say

RHNorth Carolina
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
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
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
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
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
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
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
Gregg The parts arrived and were installed today, I’m ecstatic. Feels like a totally different bike! Cheers, Jay
Kevin R Elm, New Jersey
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
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
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!!

SPEARS RACING BUILDS ENGINES THAT WIN CHAMPIONSHIPS