Keihin Carbs

First a little background, I recently purchased a 1982 KZ1000 LTD from the original owner with 3300 miles on it.The bike has of course sat for long periods. When I bought it cylinder one was not firing, broken plug wire, air filter housing a rat nest, etc. The owner said the original carbs could not be rebuilt so he took it to a local shop and they installed a set of Keihin 1000-05R-AB carbs. I have upgraded the ignition to Dynatek green coils, Dynatek wires, I also installed a Vance and Hines 4 into 1 pipe and have a stock air filter although I have a K&N on order. I have ran a compression test and all cylinders are very close and are around 150. I put fresh plugs in and they are not white but clean enough to make me believe that I am running lean.The bike starts on the first touch of the starter, idles clean and pulls strong to almost 5000 RPM and then just noses over, will not run over 75 to 80 MPH. I received two sets of jets with the Keihins but don't know yet what they currently have in them. So two questions, should I invest in trying to repair the originals or stay with the Keihins? Secondly would there be any advantage to changing the ignition system over to Dynatek? As I mentioned I already have the coils and wires but am wondering if using the Dyna S set up would give a noticeable difference in performance. Thanks in advance for your advice.

Would assure that the timing advancer is properly functioning, and isn't stuck in the retarded idle position.

The advancer may require lube or both clean and lube.

It's not supposed to look like this:




Here are the pivots that require lube.




Good Fortune!

If its been siting for a long time, I would check the ignition advancer for correct function. Those carbs I'm not familiar with by those numbers, but do you know what they were off of? That might help some. Make sure your Ignition is in good shape, timing correct, spark quality, voltage at the coils etc. You can put new wires on those Old coils, or you can get new coils and wires. I would Much rather the OEM Kawasaki Ignition in good condition, over the Dyna S.
Also those carbs, you should check the Fuel Level in the bowls, with a clear piece of tubing hooked up to the drain, and run up along the carb body as a sight gauge. This and the ignition needs to be correct before attempting to re-jet.

Have a look at the Factory Service Manual in my signature, it will help you out a lot.

Thanks again for the responses, the Keihens were new as I have box they came in. The carbs have a decal on them stating they are race only? I pulled the timing cover and the plate,everything behind it was clean, nothing rusted or stuck that I can see. I sprayed a little WD40 in and wiped everything down but the springs have tension and the weights move back and forth to the advance stops with no apparent binding or sticking. I just installed a new air filter and the bike seems to be laboring even more which is kind of backwards as I thought if I had a lean condition the additional restriction of the filter would fatten it up.

I am partial to 29mm smoothbores but mikuni rs 34mm carbes are excelent and easy to tune. The flat slides radle a bit and if you run pods it will sound like wrist pins slaping. Not to wory. I hate cr carbs from kehin. They are really a race only carb in my opinion.

check out omrs write ups on cr specials,he seems to have good luck with them