Featured Products

Steering Damper Kit Complete

Kawasaki Ninja 400 Linear Steering Damper Kit Complete 2018/Current

Spears Racing has been on the cutting edge of making new products for the little commuter style bikes for decades, most of these products come from the motorcycle being used for something other than what it was intended to be use for…RACING!! this is why we have brought the Ninja 400cc Steering Damper Kit Complete.

The kit will come with the Spears Racing’s designed Steering Damper Mount Kit, and will come with the Spears Racing steering damper which is the highest quality steering dampers available. The piston-style Linear style damper  (as opposed to rotary-style) was designed specifically with racers and street riders in mind

And the last item and one of the most important we will offer in this kit is the Spears Racing  Aluminum Steering Stop.

$179.99/$469.99 per kit

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Bonamici Kawasaki Ninja 300/400/500 Brake W/Remote Brake Adjuster are designed for the OEM brake Master cylinder

Designed specifically for the Kawasaki Ninja 300/400/500, this Brake lever combination from Bonamici will improve the look and feel of the hand levers on your Kawasaki. Bonamici levers are made from a single piece of billet aerospace grade magnesium alloy in their factory based in Italy, with a black anodized finish for corrosion resistance and durability.

These Levers also include a dedicated Remote Adjuster which can be used while you’re riding to adjust your brakes to get the best feel, especially when you’re riding at a track

 
$344.99/$299.99 ea.
 
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Titanium Brake Caliper Pad Pin Kawasaki Ninja 250/300/400/500cc M10x(1.00mm) Race Spec Pack x2

Spears Racing Titanium Brake Caliper Pad Pin Kawasaki Ninja 250/300/400/500cc M10x(1.00mm) Race (Race Drilled) Engineered for the most demanding high-performance environments, this Spears Racing Titanium brake caliper pad pin delivers the perfect balance of extreme strength, significant weight savings, and total reliability. Premium Aerospace Grade Titanium (6Al-4V Grade 5)
Manufactured from the same titanium alloy used in aircraft and Formula 1 components, these bolts offer outstanding tensile strength, fatigue resistance, and complete corrosion immunity — even in the harshest racing conditions.

 

 

$39.99 Set of two (2)

 

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Kawasaki 400/500 Transmission Shift Kit with Shift Spacer

Spears Racing believe there needs to be a little more clarity to this product, a lot of entry riders do not know, the issues that this is designed for is for the Kawasaki ninja 400/500 which is a commuter built motorcycle the way it is set up from the factory will in fact work for the daily rider, but once you have decided to take your 400cc to the track a lot of things will change.

The current shift arm has a shift paw on the end(behind the clutch basket) this engages to the shift star that is connected to the shift drum, you can see in the detailed pictures that from the factory the shift paw does not fully engage to the shift star.

 

Kit contains the following:

    $99.99/$79.99 Kit

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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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Bonamici Yamaha YZFR-7 Brake lever W/Remote Brake Adjuster are designed for the OEM brake Master cylinder.

Designed specifically for the Yamaha YZFR-7, this Brake Lever will improve the look and feel of the hand levers on your Yamaha. Bonamici Levers are made from a single piece of billet aerospace grade magnesium alloy in their factory based in Italy, with a black anodized finish for corrosion resistance and durability. These levers are incredibly high quality and offer great value for money, making them perfect for the Track Day or serious Racer. These Levers also include a dedicated Remote Adjuster which can be used while you’re riding to adjust your brakes to get the best feel, especially when you’re riding at a track.

$149.99/$449.99ea.

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Kawasaki Ninja 400cc/500cc Bored Throttle Bodies

Spears Racing’s Preparation of the High Flow Throttle Bodies is a multi-step process that includes: boring custom fit CAD designed throttle blades (this is done per job) we do not cut to the throttle plate size , we cut our plates to the bore size, and we also are reducing shaft profile (If needed), installing button head screws, milling topside and tumble polishing. By increasing air flow up to as much as 15%.

Gains from most of the Kawasaki Ninja 400cc/500cc Bored Throttle Bodies can be dependent on other modifications you have done to your engine. Generally speaking, anytime a throttle body is added, there will be some added horsepower. The amounts can range from 7 to 15% increase of RWHP depending on what other modifications are done to the engine.

This is a direct bolt on to your motorcycle, this will still allow you to use your stock OEM air box or if you would like to you can fit sets of individual air pods to your throttle bodies.

 $749.99 per set

 
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Kawasaki Ninja 400cc/500cc Heat Shield/Thermal Deflector

Kawasaki Ninja 400cc/500cc Heat Shield/Thermal Deflector

Because of the forward-positioned air intake uses two (2) small ducts at the front of the bike to route fresh air to the engine, the air is heated by the engine and will pull down performance of your engine.

Cold air is dense compared to hot air, which allows for a better quality burn when it is mixed with fuel and ignited.

The Heat Shield/Thermal deflector, it’s designed to protect the air box/ filter area from the thermal radiations generated by the cooling radiator and combustion engine.

The Heat Shield/Thermal Deflector has the degree of a separating wall/deflector between air filter area and rest of engine compartment.

The use of the Spears Racing Heat Shield/Thermal deflector has the following advantages: the air flow generated by cooling radiator (i.e. thermal radiations) is deflected outside the air filter area the temperature of the air box/air filter is maintained at an optimum level (i.e. their over-heating is avoided).

$64.95/$59.99 ea.

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Brembo 107A48608 Z04 Compound

Kawasaki Ninja 300cc/400cc/500cc Brembo Z04 Brake Pads

Brembo Racing Z04 compound was developed specifically for racing and designed to provide maximum performance in the most extreme competitions.

The most significant characteristics of this material are its high friction and consistent efficiency, especially at high disc temperatures. These characteristics ensure superlative, consistent braking for the entire duration of the race and make the braking system much less prone to fade.

Brembo Racing Z04 brake pads are used in the World Superbike and SuperSport Championships. 

Brembo’s Racing Z04 compound is Brembo’s highest performance motorcycle racing brake compound.

 

 $189.99/$179.99 per set

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WHO WE ARE

SPEARS RACING

Gregg Spears is the President, founder, and team manager of Spears Enterprises / Spears Racing. With 49 years in the motorcycle industry, he has spent 40 of those years as a leader in motorcycle maintenance and 35 years providing roadracing support and team management. Spears Racing has been a dominant force in California racing, earning championships at the class, state, regional, national, and world levels. The company is also recognized as one of the first Dynojet Power Commander tuning centers in the world.

Spears graduated from high school in 1977 and began his career as Lead Motorcycle Technician for the San Jose Police Department. His attention to detail quickly became apparent, and he started working on motorcycles in his off-hours. Demand for his skills grew rapidly. In 1980, with just $200 and a toolbox, Spears Enterprises was born. Working from his carport and making house calls, Gregg soon recognized the need for a full-service motorcycle repair facility.

In 1991, after leaving the San Jose Police Department, he opened Spears Enterprises in Campbell, California. Operating as a sole proprietor, the business was quickly overwhelmed with customers. He hired employees to keep up with demand. Long hours and relentless dedication to service drove steady growth. By 1995 the company expanded to a second location and had established itself as the leader in police motorcycle maintenance, supporting as many as 12 different police departments.

Alongside the service side of the business, Spears Racing built a strong reputation working with dedicated roadracers. The team became a recognized force in AFM, AMA, CCS, WERA, AHRMA, LRRS, and MotoAmerica competitions. Efforts expanded across the United States and internationally to Australia, Ireland, Germany, New Zealand, and the United Kingdom, resulting in numerous international championships. Racing support continues to grow.

In the summer of 2015, one of the team’s sponsors assembled Emerald Roadracing to compete in the prestigious Isle of Man TT. Through long hours and the dedication of rider and crew, the team finished 9th overall in the Lightweight / Supertwins class on a Spears Racing-powered Kawasaki ER650.

Today, Spears Racing has shifted its primary focus to manufacturing and supplying high-quality race products for smaller-displacement motorcycles. The company offers more than 2,000 products, including championship-designed engine kits and purpose-built race parts. Customer service and product quality remain the foundation of everything we do.

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