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2006 was an incredible year for Pro Circuit. From all the amateur championships, to all the Off-Road Championships. From the World Championships, to all the AMA Championships. And don’t forget about the freestyle titles and world records. Pro Circuit was there for all of them.
But we were only there because of the dedication and determination of all the riders (whose names are listed on the left page) and teams who CHOSE to use Pro Circuit products and services to take them to the top. Thanks to everyone involved for all of your efforts. And congratulations on a great year!


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Pro Circuit Launch Controls Pro Circuit Adjustable Clutch Perch w/ Hotstart Pro Circuit Clutch Covers
Pro Circuit Launch Controls
List Price: $109.95
Our Price: $99.99
You Save $9.96!
Pro Circuit Adjustable Clutch Perch w/ Hotstart
List Price: $149.95
Our Price: $135.95
You Save $14.00!
Pro Circuit Clutch Covers
List Price: $169.95
Our Price: $149.95
You Save $20.00!
Engineered exclusively for the unique demands of motocross, GNCC, supercross and other motorcycle starting lines
CNC machined controls provide incredible strength and effortless correct fork preload like no other system on the market
Feature 7075 T6 billet aluminum lockdown assembly button and catch band
Include complete template sticker for multiple settings
Simply the finest clutch perch ever made.
CNC-machined aluminum works design features a threaded barrel mechanism for precise one-handed clutch cable adjustment.
Molded rubber hood wards off debris.
Large ID clamp has a Teflon bushing that lets the lever
Developed using the latest design, testing and manufacturing technologies to improve dependability, strength and heat dissipation.
Precision machined from billet T-6 aircraft-quality aluminum to aerospace tolerances.
Pro Circuit Clutch Springs Pro Circuit Throttle Tubes Pro Circuit Radiator Hose
Pro Circuit Clutch Springs
List Price: $69.95
Our Price: $65.99
You Save $3.96!
Pro Circuit Throttle Tubes
List Price: $59.95
Our Price: $55.00
You Save $4.95!
Pro Circuit Radiator Hose "Y" Kit
List Price: $199.95
Our Price: $189.95
You Save $10.00!
12-15% stiffer than stock
More positive clutch engagement
Prevent clutch slipping
Consistent spring performance
Control how efficiently your clutch turns power into acceleration
Sold as a set
CNC-machined aluminum and Teflon coated. Stronger and more durable than the OEM plastic units.
These are universal units that work on all model bikes.
Pro Circuit - Radiator Hose Kits

Constructed from pure silicone with polyester reinforcement and can withstand temperatures up to 420 degrees Fahrenheit.
Unlike the factory hoses, our silicone hoses resist ozone and UV deterioration and are more puncture resistant.
With a smoother I.D. coolant flow is also increased
Pro Circuit Umbrella Pro Circuit Ti GP Full System Pro Circuit Ti GP Full System
Pro Circuit Umbrella
Our Price: $29.95
Pro Circuit Ti GP Full System for Honda
List Price: $899.95
Our Price: $769.00
You Save $130.95!
Pro Circuit Ti GP Full System For Yamaha
List Price: $899.95
Our Price: $769.00
You Save $130.95!
Black and white
Pro Circuit logo
Pro Circuit's new system offers top-of-the-line performance and power Complete system from front to back utilizes high-quality grade-two aerospace titanium throughout to provide huge weight savings and unique highlights Packed with perfomance features tailored to the demands of serious racers and developed to lower and centralize the machines center of gravity which improves handling and critical clearances In addition to an instant hook-up under power, the system also offers huge horsepower gains across the RPM range Each model has been rigorously track and dyno tested to yield peak performance Pro Circuit's new system offers top-of-the-line performance and power Complete system from front to back utilizes high-quality grade-two aerospace titanium throughout to provide huge weight savings and unique highlights Packed with perfomance features tailored to the demands of serious racers and developed to lower and centralize the machines center of gravity which improves handling and critical clearances In addition to an instant hook-up under power, the system also offers huge horsepower gains across the RPM range Each model has been rigorously track and dyno tested to yield peak performance
Pro Circuit Ti GP Full System Pro Circuit Ti GP Full System For KTM
Pro Circuit Ti GP Full System For Suzuki
List Price: $899.95
Our Price: $769.00
You Save $130.95!
Pro Circuit Ti GP Full System For Kawasaki
List Price: $899.95
Our Price: $769.00
You Save $130.95!
Pro Circuit Ti GP Full System For KTM
List Price: $899.95
Our Price: $769.00
You Save $130.95!
Pro Circuit's new system offers top-of-the-line performance and power Complete system from front to back utilizes high-quality grade-two aerospace titanium throughout to provide huge weight savings and unique highlights Packed with perfomance features tailored to the demands of serious racers and developed to lower and centralize the machines center of gravity which improves handling and critical clearances In addition to an instant hook-up under power, the system also offers huge horsepower gains across the RPM range Each model has been rigorously track and dyno tested to yield peak performance Pro Circuit's new system offers top-of-the-line performance and power Complete system from front to back utilizes high-quality grade-two aerospace  throughout to provide huge weight savings and unique highlights Packed with perfomance features tailored to the demands of serious racers and developed to lower and centralize the machines center of gravity which improves handling and critical clearances In addition to an instant hook-up under power, the system also offers huge horsepower gains across the RPM range Each model has been rigorously track and dyno tested to yield peak performance Pro Circuit's new system offers top-of-the-line performance and power Complete system from front to back utilizes high-quality grade-two aerospace titanium throughout to provide huge weight savings and unique highlights Packed with perfomance features tailored to the demands of serious racers and developed to lower and centralize the machines center of gravity which improves handling and critical clearances In addition to an instant hook-up under power, the system also offers huge horsepower gains across the RPM range Each model has been rigorously track and dyno tested to yield peak performance
Pro Circuit Radiator Hose Kit TI 4  Duel system Pro Circuit 2009 TI-4 Stainless Race System
Pro Circuit Radiator Hose Kit- Honda
List Price: $89.95
Our Price: $79.95
You Save $10.00!
Pro Circuit Ti 4 Duel System for Honda CRF-250
List Price: $1,149.95
Our Price: $899.95
You Save $250.00!
Pro Circuit T-4R Stainless Race Exhaust
List Price: $779.95
Our Price: $679.95
You Save $100.00!
Constructed from pure silicone with polyester reinforcement and can withstand temperatures up to 420 degrees Fahrenheit.
Unlike the factory hoses, our silicone hoses resist ozone and UV deterioration and are more puncture resistant.
With a smoother I.D. coolant flow is also increased.
Style after our championship winning Ti-4 GP system the T-4 GP system offers all the same great performance without the expense of Titanium.This full race system is designed to increase performance from bottom to top end, making it easier to ride faster. The T-4 GP System offers considerable weight savings when compared to the OEM system. If noise is an issue don't worrk, the T-4 GP System complies with all the new AMA sound restrictions. The Pro Circuit T-4 GP systems were developed in conjunction with riders like Ricky Carmichael, James Stewart and Ryan VIllopoto...making it the most sought after full race exhaust system in motocross. Pro Circuit’s all new T-4R four-stroke race exhaust is now available for most current model race bikes. The T-4R features internal design changes to reduce noise and improve power delivery from bottom to top end. The stainless header pipe and silencer guarantees extreme durability, while Pro Circuit’s unparalleled performance and craftsmanship continue to set new industry standards. To complete the package Pro Circuit added a newly designed, CNC machined, billet aluminum mounting bracket to increase durability, then added the welded end cap design that we have been testing on the race bikes of Factory Kawasaki, Factory Suzuki, Factory Connection Honda, and of course Team Monster Energy Pro Circuit Kawasaki.
This no-compromise race system does not include internal spark arrestors and is intended for closed course racing only.
• Completely re-designed stainless full race four-stroke exhaust
• Meets AMA and FIM 94dB sound limits
• Incredible power gains from bottom to top end
• All new internal design that is now being used by most factory teams
• Stronger mounting bracket for increased durability and extended product life
• All new welded end cap design
• New silencer and end cap graphics
The all new T-4R Race system is strictly for Closed Course Competition. This is identical in design to the Ti-4R system used by Team Pro Circuit as well as Factory Kawasaki and Factory Suzuki, but made of more economical stainless steel, rather than the more expensive titanium.