Motorcycle Maintenance and Oil Information for 1998 Suzuki GN 125
When preparing an oil change for the 1998 Suzuki GN 125, review the engine’s oil requirements and its recommended level-check method. The answers below identify what this catalog actually lists for the motorcycle.
What type of engine oil does a 1998 Suzuki GN 125 need?
The motorcycle oil listings identify 10W-40 as the engine-oil viscosity. Catalog-matched oil products include 10W-40 Synthetic Metric Motorcycle Oil. Check the owner’s manual for any additional oil requirements beyond the listed viscosity.

