whats wrong?

can someone try to help me out? last year i took my 77 KZ1000 LTD into the shop to get them to put in carb kits and sync them, well after almost a month they called me and charged me like 850 bucks. i was only able to ride my bike last year for MAYBE 50 miles after that work was done. before winter i added stabalyzer (proper ammounts) to the gas and ran it for a little while. so this year ( 2 weeks ago) i FINALLY took my bike out, i filled the tank with gas, have been driving it for the last 2 weeks, everything has been ok (except a week ago one of the lines comming out of one of the carb was gushing out gas, i TAPPED that carb bowl and it stopped) now tonight i took it for a ride and it started lightly backfiring, spittering and sputtering when i took off, i tried to let it sit and idle and it just stalls.....can it be the damn carbs? wheni took my bike last year to the dealer here to get it fixed thay had a hell of a hard time getting it running properlly. but wheni picked it up last year it was good, like i said i even drove it around for about 50 miles before parking it before winter. New wires, plugs, plug ends, points, condensor...what do i first of all check, when it comes to fixing bikes im not that good. perhaps i should take my bike to a shop 2 hours away from where i live, i heard there good. i dunno, im pissed. i hate messing around with stuff i dont know much about, and to pay to get it fixed????WOW....850 to put in 4 sets of carb kits and sync them..thats INSANE. thanks

Clean the carbs, check for air leaks, check for vacuum leaks. Report back as needed. If you don't have a manual, I would get one. That can help you with anything you need to do.

Have you checked the spark plugs?

i was actually thinking spark plugs, but i just put new ones in this year, like not even 50 miles ago, is hits a normal thing to happen just outa the blue? likei said i have bno knowledge when it comes to bikes at all.thanks again.

Take it back to the shop where the work was done and see if they stand behind their work.

If the bike still has the original plug wires, consider replacing them. Some years ago I had similar problems on a Suzuki automobile. After trying everything else, I thought, maybe one of the plug wires is bad. Sure enough, after a new set of wires, the car ran fine.

I live in Montana where we get to ride 6 months a year and I have a lot of bikes. I have never had any luck with Stabil or any other soution you add to gas for storage. Im sure some of you swear by it but its never worked for me. I drain the carbs & tank, its very low humidity here. You can also leave the tank full & dump it in the spring or pour it in your car after draining. By doing that you will sometimes find that your petcocks leaks and plugs up the pilot jets anyway. I tried Stabil one time and had to rebuild the carbs & change the pilot jets. Thats just my opinion, Im sures others will disagree

Check your plug's. One could be fouled even tho they are new last year. Also you may need to clean your carbs, I had a similar problem with my Kz900 a few years back. I rebuilt the carbs and had the tank blasted and sealed and no problem since. It didn't cost $850.00 tho... There may be dirt in your carb. Remember if you want it done right do it yourself:P

+1 on taking it back to the shop that did the work for you. With that few miles after paying that much money that would be my first stop.

Also, do you have a fuel filter? If so, is it plugged up?

well i changed the plugs once again today. like i said they were new ones on there, i put them on 2 weeks ago. the bikes runs great once again. so is there a reason for needing new plugs so soon? the bike idles, starts, runs great again. like i said there are new spark plugs, spark plug caps, wires, points, condesors, rebuilt carbs new fuel filter. the plugs looked fine i guess, lol..dont really know what to look for, they were all a bit black. any more input is welcome, and greatlly appreaciated. thanks again

Well it sounds like you had a bad plug. What type are you using? NGK? I had a few bad NGK's in the past, but I would still clean your carb's tho'. Also check to make sure that your tank isn't rusted or dirty inside. It only takes a tiny piece of dirt to cause you problems. I would take it back to the shop and have them check it out tho'. $850.00 is a little steep for a carb rebuilt and synch.

A good idea is to but the Dyna S innition system and get rid of the points. The technology has been proven for many years and will make your bike much more reliable.