Engine & Drivetrain

Engine and drivetrain parts determine how efficiently your motorcycle converts power into forward drive — and how reliably it does so lap after lap. This collection brings together the complete driveline for sport and race machines: slipper and racing clutches from STM, sprockets by Sitta, drive chains from D.I.D and EK, quickshifters for clutchless full-throttle upshifts, and GBRacing engine case protection for track use.

Start with gearing. Dropping one tooth on the front sprocket or adding teeth at the rear sharpens acceleration for tight circuits, while taller ratios suit fast tracks and long road stints. Match sprockets to a chain of the correct pitch — 520, 525 or 530 — and decide between X-ring durability for the road and lightweight race chains where every gram of rotating mass counts. An STM slipper clutch keeps the rear wheel settled under aggressive downshifts, a genuine advantage on corner entry whether you ride road or track.

Protection deserves the same attention. GBRacing case covers shield vulnerable engine casings from crash damage — a requirement in many race series and sensible insurance on any trackday. When choosing a quickshifter, check compatibility with your model's ECU and shift linkage before you buy. Every component here is selected for riders who use their machines hard, from mountain roads to full racing conditions.