AMSOIL 100% SYNTHETIC DIRT BIKE TRANSMISSION FLUID

AMSOIL 100% Synthetic Dirt Bike Transmission Fluid delivers smooth, consistent clutch engagement and strong gear protection for two-stroke and four-stroke dirt bikes with separate transmission sumps. It is a purpose-built, friction-modifier-free synthetic formulation designed to outperform OEM fluids in the demanding conditions dirt bikes face on trails and tracks.

Dirt bike transmissions take a beating. Constant clutch slipping during hill climbs, rapid-fire shifts in tight single track, and sustained high-RPM operation in hot conditions all work to shear down conventional transmission fluids. When viscosity drops, the protective film between gears and clutch plates thins out. The result is accelerated wear, inconsistent clutch feel, and a bike that stops performing the way you need it to at the worst possible moment.

CONSISTENT CLUTCH FEEL FROM START TO FINISH
Clutch engagement in a dirt bike needs to be predictable. A fluid that fades or allows slippage mid-moto can cost you a holeshot or leave you stalled on a rocky climb. AMSOIL Synthetic Dirt Bike Transmission Fluid is formulated without friction modifiers, which means it maintains aggressive clutch bite without the slip, grab, or chatter that plagues many OEM and aftermarket fluids. Its superior friction-durability properties help eliminate clutch fade even during extended riding sessions with heavy clutch use. The lower-viscosity formulation is specifically designed to deliver a more aggressive clutch feel, giving riders confidence that power delivery will be immediate and repeatable from the first lap to the last.

RESISTS SHEAR AND VISCOSITY LOSS
The constant meshing of gears and engagement of clutch plates inside a dirt bike transmission generates enormous mechanical shear forces. Fluids that lose viscosity under these conditions fall out of their intended protection range, leaving metal surfaces vulnerable. AMSOIL Synthetic Dirt Bike Transmission Fluid uses high-quality synthetic base oils that naturally resist mechanical shear, maintaining a thick protective film between components even under the punishing loads of motocross, enduro, and hare scramble riding. This shear stability is what keeps the fluid working properly throughout the entire service interval, not just the first few rides.

GUARDS AGAINST GEAR AND CLUTCH WEAR
Wear protection matters in a component you cannot easily inspect mid-ride. AMSOIL Synthetic Dirt Bike Transmission Fluid scored a 0.43 mm wear scar in the Four-Ball Wear Test (ASTM D4172, Para 1: 75°C, 1200 rpm, 40 kg, 1 hr) and 0.57 mm under more severe conditions (Para 3: 150°C, 1800 rpm, 40 kg, 1 hr). Premium anti-wear additives provide an additional layer of defense beyond the base oil film strength, helping extend the service life of gears and clutch plates. Less wear means fewer rebuilds and more time riding.

WET-CLUTCH COMPATIBLE ACROSS MAJOR BRANDS
This fluid is designed for use in two-stroke and four-stroke dirt bikes that use a separate sump requiring transmission fluid with the JASO MA specification. Compatible applications include bikes from Honda, Yamaha, Kawasaki, Suzuki, Husqvarna, and KTM. If your bike runs a shared or separate transmission sump that calls for a JASO MA-rated fluid, AMSOIL Synthetic Dirt Bike Transmission Fluid is a direct-fit synthetic upgrade over stock fill.

SERVICE LIFE
Change AMSOIL Synthetic Dirt Bike Transmission Fluid according to the vehicle manufacturer's recommendations.