They are designed and made on the latest technology CNC cutting and design machinery. The raw material used is top-quality Japanese High Carbon steel of C49 hardness. Every sprocket goes through 25 production stages and 10 Quality Control stages. TECHNICAL ADVICE. By changing the ratio the manufacturer recommends we get a different performance — a different behaviour — from the motorcycle. HIGHER TOP SPEED - FUEL ECONOMY (SUGGESTED FOR TOURING) Fewer teeth at the rear. More teeth at the front. MORE ACCELERATION - SUGGESTED FOR TOWN. More teeth at the rear. Fewer teeth at the front