*Coated wrist pin on select models only.
Used by many factory teams.
ENGINE PERFORMANCE PARTS
Pro Circuit pistons are forged from high-quality aerospace
aluminum alloy, manufactured by JE Pistons using advanced
CNC-machined technologies. Designed and engineered to Pro
Circuit’s exact specifications.
Pro Circuit Clutch Springs are a must-have for any dirt bike, stock
or modified. We designed our clutch springs to increase clutch
life and reduce slipping.
Valve springs allow your engine to run at a higher rpm without
the loss of valve control. Comes with retainers & keepers. Some
models will also include spring seats.
Designed to stand up to higher engine rpm and operating
temperatures while also reducing friction.
HIGH-COMPRESSION PISTON COATED PIN*
VALVE SPRING KIT
WRIST PIN COATED
Pro Circuit Camshafts are designed to provide superior
performance over stock (HP/torque) by optimizing the valve lift
profile. Used in conjunction with Pro Circuit valve springs should
ensure a valve train free of dynamic bounce.
Pro Circuit Valve Springs allow your engine to run at a higher rpm
without loss of valve control. Depending on your bike, some of
our valve springs will also include seats.
Our valves are designed to increase performance and are
thermal-nitride coated to reduce normal wear.
Designed to last longer than stock, reduce cam lobe and bucket
wear and will prolong the life of your engine’s cam.
TITANIUM EXHAUST/INTAKE VALVES