Featured Products

Kawasaki Ninja 500cc standard bore Piston Kit

Kawasaki Ninja 500cc Standard Bore Ceramic Coated Dome/Gas Ported Piston Kit 451cc

Elevate your Kawasaki Ninja 500cc to new heights with the Spears Racing Kawasaki Ninja 500cc standard bore Piston Kit, engineered for unmatched performance and precision. Designed with a 12:8:1 compression ratio, compared to OEM 11:3:1,this kit transforms your ride into a championship-caliber machine, delivering explosive power and razor-sharp responsiveness for both street and track enthusiasts.

This the only designed race piston that has a ceramic coated dome and lateral (horizontal ) gas ports as a standard feature Utilizing State of the Art CNC machines for manufacturing.

Kawasaki Ninja 500cc Standard bore Piston Kit Includes the Following:

lateral (horizontal)  Gas Ports

Ceramic Dome Coating

Pistons x 2

Wrist Pins x 2

Piston Rings x 2

Cir Clips x 4

                $674.99 per kit

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Overbore 477.18cc Piston Kit

Kawasaki Ninja 500cc Overbore +2 mm Ceramic Dome/Gas Ported Engine Kit Pistons/Cylinder/Gaskets

Elevate your Kawasaki Ninja 500cc to new heights with the Spears Racing Kawasaki Ninja 477.18cc Engine Kit, engineered for unmatched performance and precision. Designed with a 12:8:1 compression ratio, compared to OEM 11:3:1,this kit transforms your ride into a championship-caliber machine, delivering explosive power and razor-sharp responsiveness for both street and track enthusiasts.

This the only designed race piston that has a ceramic coated dome and lateral (horizontal ) gas ports as a standard feature Utilizing State of the Art CNC machines for manufacturing.

Kit Components
  • Bored and re-plated cylinder (NSC-coated)
  • 2x Pistons with Thermal Barrier Crown Coating, Lateral (horizontal) gas ports.
  • 2x Wrist Pins
  • 2x Piston Ring Sets
  • 4x Cir Clips
  • Custom +2mm head gasket and base gasket
 
$79.98/$1759.97
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Slipper Clutch for the Suzuki GSX-8R

Suzuki GSX-8R Slipper Clutch Design 2024 > Current

The Spears Racing Slipper Clutch for the Suzuki GSX-8R is a high-performance upgrade designed for racing, track, and street riding. Here’s a concise breakdown of its key features, benefits, and components based on the provided information:
Key Features:
  • Material: CNC-machined from EN AW 7075 aerospace aluminum alloy, offering high strength, ductility, toughness, and fatigue resistance.
  • Finish: Hard anodized (Type III) for a harder, denser, and more abrasion-resistant coating, enhancing durability and longevity.
  • Design: Computer-aided design/manufacturing (CAD/CAM) billet slipper clutch, tested and raced globally in WorldSSP300, World SBK, BSB, and MotoAmerica.
  • Compatibility: Uses original friction plates, drive plates, and basket.

 

 

$1069.99/$1049.99

 

 

 

 

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Bonamici 32mm Offset Non-Adjustable Clutch Lever with Perch

High Quality, Bonamici 32mm Offset Non Adjustable Clutch lever and Perch is designed to have an advantage of the larger offset(32mm) this will be a greater off set from OEM and give you a hardness of the lever with a faster detachment. This is a complete unit Perch and lever, designed and engineered by the staff at Bonamici in Italy and is machined from solid aluminum with foldable lever, are equipped with a hole for air outflow who prevents the actuation if subject to the aerodynamic force.

The final tilting part have a shape designed to offer the best grip and ergonomic. These aerospace grade alloy with an ergonomically correct design to fit comfortable and solid in riders hand yet exceptionally light for racing (approx. 30% lighter than aluminum)
The new range of brake and clutch lever controls has been redesigned to offer a better feeling of
riding with your bike.

 

$199.99/$299.98 ea

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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