I have a Briggs industrial engine. Its a 250cc 1150 series with the 3/4" shaft. I have the advantage because it's stock with a 3 inch bore. Its a great engine I love it and has pretty good power. Anyone know of any ways I can fairly cheaply have this engine spinning faster and higher ? I've got a 26mm mikuni for it and exhaust but I'm always hungry for top end. I have a standard max torque but the engine is rated 8-9 hp and it doesn't rev up all the way on my mini bike (maybe cause the max torque clutch isn't rated for this engines power?????) all advice greatly appreciated.