Description

– Bel-Ray Thumper Racing 15W50 — single-cylinder specific 4-stroke oil
– 4L pack size in 15W50 viscosity
– Wet-clutch compatible (JASO MA)
– Synthetic-blend technology engineered for big-bore singles

Bel-Ray Thumper Racing is purpose-formulated for high-output single-cylinder four-strokes — the category that produces the most demanding loads on motorcycle engine oil. The 15W50 grade in a 4L pack matches the typical service interval on modern enduro and MX four-strokes.