jsut looked thru the engine pics. is the f4r engine an ally block or cast iron, like the original f7 engines? is it using wet liners?
also ive noticed that the inlet an exhasut valves look identical to the f7p valves(inlet 30mm and exhaust 28mm). ive got sum pics of the gasflowed ports if ur interested from wen i swapped heads on my 16v
jimbo
jimbo1916@hotmail.com