LIQUI MOLY – LIQUI MOLY Fork Oil & Suspension Fluids, including Motorbike Fork Oil in SAE 5W Light, 7.5W Medium/Light, 10W Medium and 15W Heavy, plus Motorbike Shock Absorber Oil in 1L and 20L. Suspension is a hydraulic system, and the fluid inside it is a tuning part. Every compression and rebound circuit works by pushing oil through shims and orifices, so the viscosity you choose directly changes damping force, how the front end settles under braking, and how quickly the fork recovers between hits. That is why this range is graded rather than generic. SAE 5W Light speeds the fork up for lighter riders, cold conditions and plush small-bump compliance; 7.5W Medium/Light is the versatile middle ground for mixed street and trail use; 10W Medium and 15W Heavy add control for heavier riders, aggressive braking and bigger landings where a soft fill would blow through the stroke and pack down. The dedicated Motorbike Shock Absorber Oil serves the rear end, holding damping consistent as the shock body heats up over a long moto or a rough forest road. Rebuilding with the correct grade is the simplest handling upgrade a bike can get.