Motorcycle Repair: engine knocking, tank time, oil tank

Question
QUESTION: i have an 81 superglide it has been rebuilt a while back . i can hear a knock in the middle of the engine and dont know what the problem is, i tried pushrod adjustment and still tke knock. could it be in the lowwer end?

ANSWER: When do you mostly hear the knock? At idle, midrange or high RPMs. Do you hear it more when the bike is cold or hot?
Mike

---------- FOLLOW-UP ----------

QUESTION: 1981 superglide starter in need of repair, can it be removed easily? it's in a rigid frame with wraparound oil tank. time for a ground up custom rebuild?

Answer
Start will just unbolt from the inner primary and slide out under the oil tank. As to the time for a ground up rebuild, that would have to be determined by you. If your motor is knocking in the bottom end, it sounds like a rod going out.
If you are interested, I can give you a quote for a ground up rebuild.
Good luck and happy riding
Mike