400ex head porting pointers

[hondaguy20]

ive done some pocket porting on some small block chevy heads and i was wondering where to port 400ex heads... it would be awesome if some one could post a cut-a-away picture of a 400ex head and show me what to look for adn where to take away in the head...thanks

[mad440]

Personally i would take it to an experienced engine builder that knows single cylinder engines. i know you said you did some work on car heads, did you also run those heads through a flow meter to see if you infact increased the flow? because a botched port job can actually hurt performace and on a single cylinder there is no room to loose performace. you can disassemble/reassemble yourself but a good engine builder with a flow meter will be able to hook up your heads better than you trying to shave some metal out of the ports