TWO STROKE PORTING Porting is the key to two stroke performance, and we are experts at designing ports to do a specific job. The process begins with a thorough examination of the parts and specifications, which are then evaluated with different computer programs to fine tune the design. Port modifications are executed with precision for optimum performance and efficiency. Crankcase and manifold porting and matching is also available. Port molds such as these from a stock Banshee can be made to study port shapes and angles, and see areas that need improvement. MACHINING We measure and adjust compression ratios, squish angles, squish clearance, squish velocity, and combustion chamber shape to optimize the combustion process. Variables are adjusted to work for your power output, RPM range, and fuel octane. This Bultaco head had a trough type chamber with two angled spark plugs, and was welded and remachined to a modern design. See my tech article on head design

	FOUR STROKE PORTING We use flowbench testing to evaluate ports and modifications. Molds such as this one, from a Benelli 250 single, can be made for precise measurements and can be used to cast a test head for flowtesting. Years of experience allow us to make the right choices for your engine. Properly matching flow rates with engine needs provides high power output with a broad power spread. Intake systems can be tested to ensure all aspects of engine breathing are matched to the desired levels. CRANKSHAFTS We offer crank truing and welding, full rebuilds, balancing, and specialized machining. Cranks are assembled and trued to better than factory specs, and weight and balance modifications allow smooth operation at high revs. We can provide quality parts to rebuild most cranks, to build your engine on a solid foundation.