Some very important engine components in the Lightweight engines are Pistons, Connecting Rods, Spark Plugs, Hybrid bearings and special coatings to these components.
Spears Racing has been designing and making race pistons for decades, their continuous committed to excellence to advance as the industry changes. This commitment has resulted in more forgings specific to certain applications, proprietary treated wrist pins and piston rings manufactured only for us. Each of these aspects has been put through stringent research and development stages to ensure that our product will exceed your standards.
Piston Rings:
Piston rings provide a sliding seal between the outer edge of the piston and the inner edge of the cylinder.
The rings serve two purposes:
They prevent the fuel/air mixture and exhaust in the combustion chamber from leaking into the sump during compression and combustion.
They keep oil in the sump from leaking into the combustion area, where it would be burned and lost.
Connecting rod
The connecting rod connects the piston to the crankshaft. It can rotate at both ends so that its angle can change as the piston moves and the crankshaft rotates.
NGK Racing Series Plugs are Engineered to Withstand the Harshest Engine Conditions. NGK Spark Plug R0045Q-9
Before you order this Spark Plug for your Yamaha YZFR-3, Please Measure your current Spark Plug length, The Newer European manufactured Yamahas and the US based require a different length Spark Plug (Here)
NGK Racing Series Plugs are Engineered to Withstand the Harshest Engine Conditions.
THIS PRICE IS FOR (1) SPARK PLUG, NOT A FULL SET
This fogging oil easily sprays on and coats internal engine components to prevent corrosion. Formulated to displace moisture from metal to protect engine, this product also lubricates the cylinder’s walls
Treating your gas with this fuel stabilizer prevents gum, varnish, rust, and corrosion in your fuel tank, all of which are costly to repair.
Spears Racing’s slipper clutch reduces rear wheel chatter on downshifting, allowing better chassis stability under braking and entry to corners, reducing the chances of crashing and allowing the rider to reduce lap times as a result of better grip
Every Spears Racing Slipper Clutches arrive with the Proper Clutch Springs
This kit has ball bearing roller that will make contact with the star shifter and will give your SV650 a smoother feeling when changing the gears. The current detent spring on your SV650 is for “Commuter Bike Riding” ,The ability to feel the shifts and the positive snap of going into the next gear will give you more confidence ion the track.
This kit has been race track proven at MotoAmerica Twins class, AFM, CCS, WERA and WSMC racers.
Machined from mild steel and are the direct bolt on replacement for your stock OEM dowel pins
The automatic adjusters can back out when the throttle is closed suddenly at high rpm.
Over the years, we’ve witnessed countless failures of the OEM plastic gear, often going unnoticed until they lead to engine damage. The Spears Racing Steel Oil Pump Gear addresses these issues head-on, providing peace of mind for street riders, track enthusiasts, and professional racers alike. It’s engineered to handle strenuous racing environments without cracking, stripping, or disintegrating, ensuring consistent oil flow and engine protection.
Titanium is 45% lighter than steel equivalents
These kits are expertly manufactured to OEM specifications with Forged from 4140 steel to ensure long service life, each shim is heat treated and precision ground to exact sizes
The perfect complement to any service or race engine.
Stock studs are made from poor material that will stretch (This is why Yamaha Recommends to replace the OEM Head bolts after removing “One and Done”) and allow gasket leakage at the head.
Spears Racing Cylinder head stud Kit are made from heat treated 8740 steel, centerless ground, and have rolled threads after heat treat for maximum strength.
If you are using your motorcycle on a closed course (racing, track days, etc.) you will want to remove all unnecessary equipment from your bike for reduced weight and ease of maintenance
The guard is CNC machined from aircraft quality aluminum. Finished in durable black powder coating, this radiator guard kit includes hardware and easy to follow instructions.
Superior quality and easy to install. It improves the looks of your bike and help to protect your expensive and vulnerable radiator from flying debris. The radiator is well positioned for the on rushing air stream,
Each guard is shaped & designed to flex perfectly into the radiators side gutters- very easy to fit!
Unlike a lot of the other Grille guards Spears Racing has designed their kit to include all of the correct Hardware.
No products in the cart.
International Postal service disruptions
International Mail Service Suspensions
Updated: Oct. 1, 2021
The Postal Service™ is temporarily suspending international mail acceptance for certain destinations due to impacts related to the COVID-19 pandemic and other unrelated service disruptions.
Suspension Due to Unavailability of Transportation
| Afghanistan | Guadeloupe | New Zealand** | Tajikistan |
| Australia* | Laos | Reunion (Bourbon) | Timor-Leste |
| Bhutan | Libya | Saint Pierre and Miquelon (Miquelon) | Turkmenistan |
| Brunei | Martinique | Samoa | Yemen |
| Cuba | Mayotte | South Sudan | French Guiana |
| Mongolia | Syria |
Customers: please refrain from mailing items addressed to the countries listed here, until further notice.
These service disruptions affect Priority Mail Express International® (PMEI), Priority Mail International® (PMI), First-Class Mail International® (FCMI), First-Class Package International Service® (FCPIS®), International Priority Airmail® (IPA®), International Surface Air Lift® (ISAL®), and M-Bag® items.
*Australia’s service disruption affects Priority Mail International® (PMI), First-Class Package InternationalService® (FCPIS®), Commercial ePacket (CeP), International Priority Airmail® (IPA®) packets, InternationalPriority Airmail® (IPA®) M-Bags, International Surface Air Lift® (ISAL®) packets, International Surface Air Lift®(ISAL®) M-Bags, and Airmail M-Bags.
**New Zealand’s service disruption affects Priority Mail International® (PMI), First-Class Package International Service® (FCPIS®), Commercial ePacket (CeP), International Priority Airmail® (IPA®) packets, International Priority Airmail® (IPA®) M-Bags, International Surface Air Lift® (ISAL®) packets, International Surface Air Lift® (ISAL®) M-Bags, and Airmail M-Bags.
Unless otherwise noted, service suspensions to a particular country do not affect the delivery of military and diplomatic mail.
