A motorcycle oil pump with a 39‑tooth drive is a gear‑type pump used in the engine’s lubrication system. Its 39 teeth mesh with the engine’s drive gear to spin the pump, drawing oil from the sump and pressurizing it to feed bearings, camshafts, and other moving parts. By maintaining steady flow and pressure, it helps keep the engine balanced, cool, and protected from wear. Variants with a 39‑tooth configuration are marketed for specific small‑displacement bikes such as CG‑type models, highlighting matching tooth count for proper fit and performance.
