help!! cb750 will not run!!

[kiser1991]

hell i just bought a 1974 cb750 and it will not idle and i cant rev it up with out it cuting out? it has pod filters on it and when the choke is on it will rev up all the way but still wont idle any sugestions will help! thanks!

[Lucky 1]

Is that the bike in the avatar?

Anyway.. You need to take the carbs off and clean the idle jets.
They get clogged up from sitting.
You cannot just spray them with carb cleaner. Won't do the job.
You have to remove the idle jets and clean them with a #10 steel guitar string.
You must see daylight through them. Compressed air helps too.

If you have pods and aftermarket exhausts it will never run right until it is re jetted.

You would need to tell us the year.
What the numbers are on the carbs (stamped on)

Why not post a full size pic of the bike?

[Lucky 1]

The fact it WILL rev up with the choke ON is your
proof that it is not gettin enough gas to be able to warm up.

[kiser1991]

its a 1974 and the numbers on the carb, whitch i cant tell because it was painted black but all i can tell is on there is     0 0A   ANA     and the first A in ANA  has a box around it. wish i had more info but i have some pics here if you wana see.   http://s1274.photobucket.com/albums/y438/kiser1991/   

also has mack drag open exhaust. need any more info let me know thanks!

[shinyribs]

It has keyhole carbs on it. The later model carbs,not 74 model carbs. I know nothing about these carbs,but that is one gorgeous bike you have there!

[Lucky 1]

Interesting motorcycle.
You will need to take the carbs off if you have any skills.
Two reasons. To clean the idle jets, and to write down the jet sizes of the
main jet and idle jet. Also find out where the clip is located on the slide needle,
counting the grooves from the top.

Perhaps the PO could just tell you?

Has the bike been sitting? For how long?

[kiser1991]

thanks for the advice i will start to work on it to day. it has been sitting sence around june. the bike has not ever been rejeted so i figure i can fix the idle problem by cleaning out the needles but i dont think it will fix the rev problem + should of told you all before that it back fires, in diff exhaust pipes. not sure why or if that is any info you need. but i will get the info and clean out the needles and get back with you any more advice let me know.

[Lucky 1]

Still waiting for OP to surface.