Kawasaki KXF Pro Circuit Linkage Arm
MSRP: $225.00
$180.00
Exact Fitment Guarantee
The Kawasaki KXF Pro Circuit Suspension Linkage Arm is a precision-engineered chassis handling upgrade developed directly with the Monster Energy Pro Circuit Kawasaki factory racing team to optimize the rear suspension geometry on KX250 and KX450 motorcycles. Stock Kawasaki rear suspension linkages feature a rising-rate curve that causes the rear end to feel high, stiff, and busy over initial braking bumps, often resulting in a harsh, unsettled chassis when entering rough corners and high-speed sweepers.
CNC-machined in the USA from solid 6061-T6 billet aluminum and finished in a rich clear or bronze hard anodizing, the Pro Circuit Linkage Arm is slightly longer than the OEM link arm. This subtle change in pivot geometry lowers the rear ride height of the chassis by approximately 5mm to 10mm, placing more chassis weight onto the rear wheel for enhanced squat traction under acceleration while relaxing the steering head angle slightly for superior high-speed straight-line stability. The revised progression curve makes the initial stroke of the rear shock plusher over small chop, while stiffening the final stroke to prevent harsh bottoming on big jump landings.
- Material: CNC-machined 6061-T6 billet aircraft aluminum
- Geometry: Extended eye-to-eye length (lowers rear chassis height by 5-10mm)
- Bearings: Pre-installed OEM-grade needle roller bearings and dual-lip dust seals
- Finish: Military-spec hard anodized bronze/clear coating
- Championship Pedigree: Developed with Monster Energy Pro Circuit Kawasaki race team
### Step-by-Step Installation & Safety Protocols Installation requires a motorcycle center stand, 17mm and 19mm sockets, and a torque wrench. Place the motorcycle on a stand with the rear wheel suspended off the ground. Remove the two linkage pivot bolts connecting the link arm to the swingarm and shock knuckle. Extract the stock link arm. Clean the knuckle area and inspect the needle bearings and seals. The Pro Circuit linkage comes pre-assembled with premium needle roller bearings and dual-lip dust seals. Apply fresh waterproof grease to the bearing rollers, install the Pro Circuit link arm, and insert the factory pivot bolts. Torque the linkage bolts to factory specification (typically 80 to 90 Nm). Reset rear shock sag (recommended 102-105mm of race sag) to compensate for the lowered ride height.
### Maintenance & Bearing Greasing Maintenance consists of disassembling, cleaning, and re-greasing the needle bearings every 20-30 operating hours.
Frequently Asked Questions
Q: How does changing linkage length improve cornering on a KXF?
A: Lowering the rear chassis and balancing the bike's front-to-rear stance allows the rear tire to track deeper in ruts without kicking or wallowing, giving the rider confidence to roll on throttle earlier out of turns.
Q: Are the needle bearings pre-installed in the Pro Circuit link arm?
A: Yes. The link arm comes fully equipped with pre-installed OEM-grade needle roller bearings and dust seals, ready for greasing and immediate installation.
Q: Do I need to re-valve my rear shock when installing this linkage?
A: No. The Pro Circuit linkage is designed to work effectively with stock shock valving and spring rates, though resetting your shock race sag is required.
Q: What is the recommended race sag when using this link arm?
A: Set rear suspension race sag between 102mm and 105mm with the rider in full gear on the bike in attack position.