Originally Posted by
KREATOR1
5 port engine? i though its a 3 port.
how do you know? it does not have any label on the engine.
Unless someone swapped the head, the 5 in NSR5 is 5 ports, just like NSR3 is 3 port. Take off the head and examine the sleeve. Also look into the carb or take it off and see if there is a small putty filler in the crank opening.