Bore 70 mm, stroke 58 mm, Nicasil plated alloy cylinder kit.
Port timings: exhaust port 180° - port area 1240 mm², transfer ports 122° - port area 1068 mm², inlet controlled by reed valves - port area 1807 mm².
The RB22 kit is not mentioned to displace the well proved TS1 kit. It is an additional cylinder kit which is said to be much more powerful than the TS1 kit.
The inlet system is controlled by two four plate reed valves. In conjunction they give a nice V-shape as seen on the Tassinari reed valves. The transfers are feeded directly through the inlet port. The four main transfer ports are added with a huge boost port.
The port area of the exhaust port is increased with two small side ports.
The piston is the well known TS1 item made by ASSO.
The delivery contains barrel, piston kit, reed valves, inlet manifold and gasket set.
Judged by the power the RB22 is superseding the TS1 kit. While the TS1 has a top finish and is made by Gilardoni, the RB22 is made by AIRSAL and the quality of the cast and Nikasil plating is not yet as nice as we know it from the Gilardoni kits.
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