Ask your MOM (Motorcycle Owner’s Manual) about the proper viscosity for your motorcycle.
We use this oil in our BMW motorcycles because we know it meets BMW’s specs. It’s a little known fact that for many years Spectro supplied lubricants to BMW and packaged it with the BMW name on the container.
We offer 10W30, 10W40, and 20W50 viscosities.
As a general rule of thumb, most bikes like 10W40 for general riding conditions.
For hot weather summer riding we recommend the 20W50 viscosity.