Creating usable and reliable horsepower isn’t easy. Endless hours of track and dyno testing are only part of what makes championship
winning performance. At Pro Circuit, we have more than three decades of building and tuning performance engines that help our customers
win races. From minis to full-size bikes, we take pride in building some of the fastest and most dependable racing engines in the world.
In addition to our legendary engine tuning, we also offer a line of high-performance engine components such as camshafts, titanium valves,
high-compression pistons and more that not only add performance but can increase the life of your race motor.
FOUR-STROKE ENGINE MODIFICATIONS & SERVICES*
TWO-STROKE ENGINE MODIFICATIONS & SERVICES*
HEAD MODIFICATIONS (PORT & POLISH)
HEAD & CYLINDER MODIFICATIONS
CNC-MACHINE HEAD MODIFICATIONS
REMOVE & REPLACE HEAD/CYLINDER
BORE & HONE STEEL CYLINDER
REMOVE & REPLACE POWER VALVE
RE CUT VALVE SEATS
(PER SEAT) FROM $39.95
*Listed above are only a few services/modifications
Pro Circuit offers. Please call for more details.
VALVE SEATS COPPER BERYLLIUM TRANSMISSION REM ISOTROPIC FINISHING FROM $349.95
Will not chip like the stock seats
Helps increase the lifespan of your valves
Increases lifespan of transmission parts
Improves shifting and lowers operating temperatures
(PER SEAT) FROM $129.95