Motorcycle Maintenance and Oil Information for 1998 Yamaha TRX 850
An engine-oil service on the 1998 Yamaha TRX 850 calls for more than a product match. Identify the correct oil requirement for this particular motorcycle, then follow the prescribed drain, refill, and final level-check steps.
What type of engine oil does a 1998 Yamaha TRX 850 need?
For the engine-oil application, the database lists 15W-50. Products shown for this application include 15W-50 Synthetic Metric Motorcycle Oil. Compare the product’s full specification with the motorcycle’s service requirements before purchase.
Which oil filter is listed for a 1998 Yamaha TRX 850?
The oil-filter part numbers listed for this vehicle include 24935-EA.

