Suspension Geometry & Damping
Motorcycle Fork Oil Level, Air Gap & Sag Calculator
Factory fork fluid volumes, compressed oil level air gaps (mm), fork seal dimensions, and interactive rider sag calculations to properly dial in your front and rear preload.
Yamaha YZF-R6Shop Suspension Fluids & Seals →
Fork Oil & Air Gap Calibration
Fork Oil Volume / Leg480 ml (16.2 US fl oz) per leg
Air Gap (Oil Level)95 mm (3.74 in) compressed, spring removed
OEM Recommended Fluid: Yamaha Suspension Oil 01 (KYB 01M / SAE 5W)
Stanchion Tube Diameter:43 mm
Fork Seal Dimensions:43 x 55 x 11 mm
Front Wheel Travel:120 mm
Rear Wheel Travel:120 mm
Suspension Geometry Utility
Interactive Rider Sag Calculator
Baseline Target: 27 - 33 mm (23 - 28% of 120 mm travel)
Enter R1 (fork extended off ground) and R3 (rider in full gear seated on bike) to verify suspension preload.
Measurement Tip: Measure vertically from the front axle center to a fixed point on the lower triple tree or headlight cowl. Always bounce the suspension three times prior to taking the static reading.