If I read your earlier post correctly, I think you mentioned you opened the high needle to 2-1/2 turns? If in the affirmative, that's way too rich. Usually, 170 HS only at about 1-1/2 to 1-3/4 without cdi, and about 1-1/8 to 1-1/4 for cdi equipped.

Try starting with 1-3/4 and gradually lean it until it sacks, then, richen it about 1/8 to 1/4 turns. As for the pump, starts with flush. You also want to make sure the spark plug lead is securely seated onto the plug, otherwise, can also give you problem.

Adrian