Fuel injection Throttle body. Type SF, 40 - 54mm bore

The type SF body is designed as the ultimate, no - compromise fuel injection throttle body. It may be fitted any way up and at centre distances of 63mm (not injected) or 86mm (injected) and above. It is available with 0, 1 or 2 injector positions and integral fuel rail mountings. Tapered bore bodies are stocked with 42, 45 and 48mm butterfly sizes or may be CNC bored to any reasonable shape on request. We manufacture suitable fuel rails to order, with many of the popular sizes stocked. The linkage between the bodies is ordered separately, to suit the engine layout, and fitted at the factory.
'O' rings (for 50mm and below), throttle pot clamp and other fittings are supplied with the bodies.
Operating data; Spindle rotation: 82 degrees. Torque per spindle at WOT: 110 - 120 N-mm which gives a tangential pull of 2.9 - 3.1 N on long arm of standard lever. Option of 310 N-mm springs available.
Other items; Quadrant throttle mechanism, linkage kits, range of air horns (bellmouths, trumpets, stacks), throttle potentiometers.