chopper698
CB750 Member
Newbie here just finished my 74 cb750, I had the carbs rebuilt and im using the stock air box with a 4 into 1 header with a pamco ignition. It starts right up idles no issues, but the bike fails to go over 60mph and wont go over 2400 rpm's, it falls on its face. My mechanic buddy says its my timing and to put a light on it. I put a strobe on it and it was off a hair not much to make a diffrence. I read that after timing it on the F 1-4 to bring the rpms up to 2300-3000 and check the double lines and check to see if it lines up with the line on the case. I did that and the two lines arent even close. I also read im supposed to check the timing on 2-3 after doing the 1-4 cylinders in the same way. Is this info correct anyone?