Senzo 219 Half‑Tooth Sprockets – Precision Without Compromise

At Senzo, we engineer components for racers who refuse to settle. Our Premium 219 Half‑Tooth Sprockets are designed to give you the finest level of gearing control available in 2‑cycle karting — delivering performance gains where every tenth matters.

Built for drivers chasing perfect ratio tuning, our half‑tooth system allows ultra‑fine adjustments without changing the front sprocket. This means faster setup changes, more consistent gearing, and the ability to dial in your kart with absolute accuracy.

Despite the name, there is no “half” tooth. Instead, each tooth is strategically repositioned using advanced machining geometry. This allows a 219‑pitch chain to seat perfectly in the valley while subtly altering the sprocket’s rolling diameter — giving you true half‑tooth ratio increments with flawless chain engagement.

Every sprocket is CNC‑machined from 7075‑T6 aircraft‑grade aluminium, held to a tolerance of 0.01 mm. This ensures exceptional concentricity, reduced drivetrain friction, and smoother power delivery throughout the rev range. After extensive R&D and track validation, we’ve refined the pitch profile for superior load distribution and maximum efficiency.

You’ll feel the difference in how cleanly the chain rolls, how consistently the kart accelerates, and how confidently you can chase lap‑time precision.

Our 219 Half‑Tooth Sprocket range is available in 72.5T to 81.5T, giving you the flexibility to fine‑tune gearing for any track, engine, or race condition.