ach episode of “Inside Motorcycling presented by Parts Unlimited” features a project bike built by an expert from the category of each particular machine. Mention motocross and Pro Circuit comes to mind quickly, so our TV crew headed to Corona, California over the winter to see what they were working on in the back room of the Pro Circuit race shop.

As we all know now, Pro Circuit was hard at work on their new Kawasaki KX250Fs for their Supercross team, but the new Honda CRF250R was just hitting the shops, so we asked them what they could do with one of those?

Our project bike was built just a few days after the first CRF250R arrived at Pro Circuit and a power increase in the 10-15% range was found, but Service Manager Dave Chase stated for the TV camera that there was a lot more on the way. Based on the success of Pro Circuit’s Kawasaki four-stroke riders thus far in the 2004 Supercross series, we’d say we’re believers.

Race ready! Our TV bike looked pretty tricked out when it was done and we rolled it out in the Pro Circuit showroom for final photos.

Engine:
Exhaust system: Pro Circuit
Ti-4 “Low Boy” system.
Engine modifications: Cylinder head stripped and cleaned, then ported to specifications.
Suspension:
Pro Circuit Shock Spring / Pro Circuit
Fork Springs.
Suspension modifications: Rear shock
re-valve and setup; front fork re-valve
and setup.
Pro Circuit accessories:
Pro Circuit Quick Adjust Clutch Perch, Axle Blocks, 20mm Works Triple Clamps (Top clamp/ bottom clamp/ Handlebar mount kit), Foot pegs, Pro Circuit/N-Style Graphics and Seat cover, Aluminum Throttle Tube and Carbon Engine Guard set.

Other accessories:
Front rim: Excel
Rear rim: Excel
Rear sprocket: Renthal
Handlebars: Renthal Twin Wall
Grips: Renthal
Chain: DID 520MX
Tires: Pirelli
Air filter: K&N
Dealers: Parts Unlimited carries the Pro Circuit, Excel, Renthal, DID, Pirelli and K&N products used here. See the Parts Unlimited Off-road catalog or ask your rep for more details. For labor prices or more information about Pro Circuit products featured in this story, call 909-738-8050 or check out their website at: http://www.procircuit.com.

“Inside Motorcycling presented by Parts Unlimited” will air on Spike TV every Saturday morning at 10 a.m. (PST & EST)* through March, 2004. For more information, log onto: www.insidemotorcycling.com.
*Check your local listings, especially if you have a satellite dish instead of cable.