My road bike has the Stan Stevens 300cc conversion, according to the dyno figures for this one it put's out 62Bhp (different dyno) I would say the Graham File engine is the better one, it seem's to be a lot more poweful & revs a lot quicker.
The File tune cost me about £1400.00 (including looking through & cleaning 3 box's of engine bits, stripping 3 cranks & rebuilding 1) on top of this I supplied the pistons which were about £180.00, a crankshaft kit £165.00, Manifold rubbers £39.00,carburetor to airbox rubbers, kip valves, clutch star, kips linkage's & 35mm carbs (brought of Charles) Thought i'd give everyone on here an idea to the of cost to building a "race spec" engine, now "does any one want to buy one of my daughters!!"


