Rider Support
Classic Caps
Limited Triple Clamps
Item of The Week
Race Recap
2018 Team Graphic Kits
Bike Sale
Email Sign Up
Free Freight on Retail Orders over $250 in the USA (Excl. AK & HI). Online Orders Only.

September 19, 2018

2019 KX450 Race Piston

A Boost in Performance For New KX450 Models

CORONA, CA - September 19, 2018 - Offering our customers only the finest performance parts available is what we're all about here at Pro Circuit. Our newest product is a High-Compression Piston Kit for the 2019 KX450. Manufactured by JE Pistons to our exact specifications, Pro Circuit pistons are forged from high-quality aerospace aluminum alloy using advanced CNC-machined technologies. The result is a significant gain in low-end torque and high-RPM performance. Pro Circuit High-Compression Piston Kits are designed for superior performance in either stock or modified engines and is a must-have engine component for serious racers.


Pro Circuit. We Race.


September 14, 2018

New Headwear From Pro Circuit

Never Go Out of Style With The Pro Circuit Classic Cap


CORONA, CA - September 14, 2018 - Recently arriving at the Pro Circuit headquarters doorstep, two brand new stretch-fit caps that will be sure to add a little bit of style to one's image. The Classic cap in black and tan are hand-assembled by New Era. These 39THIRTY caps feature the iconic Pro Circuit logo embroidered on the front and We Race on the back. Pick up this classic accessory from Pro Circuit and never go out of style.


Pro Circuit. We Race.



All products manufactured and/or distributed by Pro Circuit Products, Inc. are offered and designed for use with standard machines. Pro Circuit Products, Inc. makes no claims as to the products effectiveness on modified machines. Pro Circuit Products, Inc. is the sole determiner of abuse, misuse, installation errors and modifications. We assume no liability for any errors in listings, specifications, part numbers, prices or model applications. Pro Circuit Products, Inc. reserves the right to change specifications, product descriptions, product quality, pricing and model applications at any time without prior oral or written notice and without further obligation.

Adding new components to your motorcycle (especially to the engine, suspension or braking system) may radically alter the acceleration, deceleration, handling and braking characteristics of your motorcycle. Ensure that all parts are installed and properly torqued per the instructions supplied with the part or to the motorcycle manufacturer's original specifications. Test the motorcycle with the new part(s) on level ground, at low speed, without any other vehicles or obstacles nearby, to ensure that it is working properly. Periodically recheck, adjust or replace the parts as may be necessary depending upon the terrain, use, mileage and rider input. Consult the instructions supplied with the part, or the motorcycle manufacturer's original specifications for further details. The failure to properly install, maintain, or familiarize yourself with the new part's use, and proper operation, may result in damage to the motorcycle, and/or a loss of control, resulting in serious injury or death. Buyers assume all risk for any and all damage caused to themselves, a third party and/or property by virtue of failure of these products. By installing and/or using a Pro Circuit Products, Inc. product, you hereby accept and understand these stated terms and conditions.


Click for Older Posts

Positive SSL