What do you mean by "cranks over real hard"? Can you describe better what you hear or see when it is cranking?

 

it just doesnt crank over smooth like the older cars did if the timing was off going to try tomorrow after batt charges maybe that was it

 

i hooked my truck up to her today with jumper cables she cranked over real good so my batt must be junk since it charged for 24 hours anyway wont start all it does is pops back through the carb could i have messed the timing up when i had the primary chain and gears off changeing the bendix gear? i have spark and fuel

 

Most of the time a backfire through the carb indicates a very lean condition. Should be to big of a problem. What type of carb do you have?

Try adjusting your mixture screw more to the rich side and start it up again. But if you get back with us on what type carb you have we can help you out a bit more.

Another thing to check would be that your intake seals are correctly sealing. Sometimes the old rubber bands will rot or the intake manifold will shift enough and create an air gap.

 

i have an s&s super B carb ill try adjusting it today im layed off for a week have plenty of time the intake rubbers are new

 

yah take your time and make sure to check everything. Make sure to check that you have no intake leaks by getting the bike started (if you can) and take some WD-40 and spray around the intake seals to see if the RPM's increase. If it does then you likely have an intake leak and need to make sure the seals are completely sealing as need be.

Then if all that checks out richen up the mixture a bit, start it up and start to make sure your timing is correct, then re-adjust your carb as need be.

 

k thanks randy

 

I went through starter relays till we found the problem. The starter button had a short in it and would start the bike some times and then would die and not refire. After what seemed like a million starter rebuilds and relays bought and swapped found the prob when button wire started smoking. It was causing the trouble all the time. ( Was all new harness from HD and when we found the problem ripped whole harness out and built custom one). 1200 miles since rewire and running strong. Good luck electrical problems stink.