Motorcycle Maintenance and Oil Information for 1999 Yamaha TRX 850
If the 1999 Yamaha TRX 850 is due for engine-oil service, identify the proper lubricant and confirm how the final level must be measured. Catalog matches help with product selection, but they are not a replacement for service instructions.
What type of engine oil does a 1999 Yamaha TRX 850 need?
The engine-oil grade appearing in this motorcycle's product results is 15W-50. Catalog-matched oil products include 15W-50 Synthetic Metric Motorcycle Oil. Viscosity alone does not establish full compatibility; verify the manufacturer’s oil standard.
What oil filter does a 1999 Yamaha TRX 850 need?
The oil-filter part numbers listed for this vehicle include 24935-EA.

