SAE 10W-40
4-Stroke Full Synthetic 10W-40
Road and sport touring fill with clutch-safe friction and strong gear shear stability.
API SNJASO MA2
Motorcycle
Motorcycle Oils
Motorcycle engines share their oil with the gearbox and clutch. These formulations are shear-stable enough for gear teeth and friction-correct for wet clutches, with no anti-friction additives that cause slip.
6 grades in range
Why this range
Motorcycle oils with wet-clutch friction control
Bohr Chemical motorcycle oils are formulated to JASO wet-clutch friction requirements, so a single sump can lubricate the engine, gearbox and clutch without slip or shudder. Four-stroke, two-stroke, scooter and off-road grades all carry shear-stable base fluids that survive high-rpm gear-tooth shearing.
JASO friction compliance
No resource-conserving friction modifiers, so clutch take-up stays crisp from cold.
Gear-shear resistance
Base fluid and viscosity modifier selection keeps grade in spec after shared gearbox shearing.
High-rpm oxidation control
Air-cooled and high-revving engines see peak oil temperatures — antioxidants are dosed for it.
Typical applications
- Road and sport four-stroke motorcycles
- Two-stroke pre-mix and injection systems
- Scooters with separate gear cases
- Off-road, enduro and motocross
Featured grades
Most specified in this range
SAE 10W-60
4-Stroke Racing Full Synthetic 10W-60
High-temperature grade for track work, big-bore twins and air-cooled engines.
API SNJASO MA2
SAE 10W-50
Off-Road 4-Stroke 10W-50
Motocross and enduro service where sump volumes are small and rev ceilings are not.
JASO MA2
Full range
All motorcycle oils
SAE 10W-40
4-Stroke Full Synthetic 10W-40
Road and sport touring fill with clutch-safe friction and strong gear shear stability.
Specifications
API SNJASO MA2
SAE 10W-60
4-Stroke Racing Full Synthetic 10W-60
High-temperature grade for track work, big-bore twins and air-cooled engines.
Specifications
API SNJASO MA2
SAE 10W-50
Off-Road 4-Stroke 10W-50
Motocross and enduro service where sump volumes are small and rev ceilings are not.
Specifications
JASO MA2
Premix / injector
2-Stroke Racing Injector Oil
Low-ash, low-smoke two-stroke lubricant that keeps ports and power valves clean.
Specifications
API TCJASO FD
SAE 10W-40
Scooter 4-Stroke 10W-40
Correct MB friction rating for CVT scooters with automatic dry-clutch drivetrains.
Specifications
API SLJASO MB
5 / 10 / 15 wt
Fork & Suspension Oil
Stable damping across temperature with high foam and aeration resistance.
Specifications
OEM cartridge fork suitable
Common questions
Motorcycle Oils FAQ
What does JASO MA2 mean?
It is a wet-clutch friction rating. MA2 oils have the highest friction retention, which suits most modern four-stroke motorcycles with a shared engine and clutch sump.
How often should motorcycle oil be changed?
Follow the service schedule for your model. Track use, sustained high rpm and short trips all shorten the safe interval.
Talk to a lubrication engineer, not a call center
Send your equipment list and duty cycle. We will come back with a specification-matched recommendation and the data sheets to support it.