Need Carb Help Asap

[williebiv]

I have 30mm carbs that are giving me alittle trouble I can't figure out. At WOT one cylinder will totally cut out but at anything else she is running like a dream.

 

I have tried changing plug wires to see if it follows, it doesn't. I change the carb from side to side and it follows the carberator. I have switched the slide assembly and it follows where the main body of the carb is. I have cleaned out complete carbs the jets, the needle assembly and all. I check and changed the float level to the point where the fuel is comming out the overflow and it still does it. Airfilters are clean and everything is sealed tight, did compression test and it is same on both sides.

 

Any idea what this could be? Any help would be appreciated.

[H300F]

Did you buy these carbs off of bansheeboy95 on ebay? Is so I have these carbs and they are nothin but trouble.

[williebiv]

Nope I got them from Carbparts warehouse.

[pimp559]

Inspect your needle and ceet. It could be worn. Make sure the jets are the same in each carb also.

[williebiv]

needle and ceet are still good carbs are almost new and the jetting is the same (both 175's)

 

If ignition was bad or pickup was off it wouldn't follow from cylinder to cylinder like mine is right?? Must be a carb problem not an electrical right??

Edited April 21, 2004 by williebiv

[MotulMonsta]

Well..here is the funny part.

Bashee ignition 101:

 

Remember at all times on a banshee ignition..both plugs fire at the EXACT same time. So if #1 was a TDC and fires, #2 would fire at BDC. In essence each plug fires twice per rev.

With that in mind simply swiching plug wires won't make a diffrence as each plug will fire regardless of what cylinder it is. You can pull out both plugs and kick the machine over, if they both spark..all is good. If only one sparks you got a bad plug wire or your cdi is bad. If it's sparkin' then the stator is puttin out juice. It has two knubs on it and a pick-up asy. You can check the gap of the knub to the pickup..I set mine to where it's 10 thousandth of an inch away with a feeler gauge. Then clean up the contacts. If your spark gets better, then your stator is weak and might need to be rebuilt. The cdi Is a harder beast to fix. If your bike sparks then doesn't spark then sparks again followed by only one side sparking then the other then it dies completely for 10 kicks then fires up again..that's a bad cdi. A good ignition will spark both plugs at the exact same time twice per revolution every time you kick it over.

 

Now onto the carb. Both carbs are setup exactly alike? And if it's the #1 carb that dies and you swap it to the number 2 side and then the number 2 side dies...well that carb is out of wack. Does the carb have a little nipple after the venturi(in front of the slide on the barrel asy that goes into the intake of the motor)? If it does, enshure that the caps are properly installed..If you don't have a cap, run a tube to connect both carbs together. Now you need to uncrew EVERYTHING from the carbs..I mean everything that will come apart NEEDS to come apart..if they are Kehnins then you can break everything down on that carb into like 40 pieces...Anyways, there are a shitload of air passages that could be clogged and a simple spraying of carb cleaner won't be able to get. You can remove the needle valve seat and the tube should have a shit load of little holes in it..clean that..then remove your air screw all the way out, take the choke all the way out remove the jets..both pilots and main and remove the main jet housing also make shure your not getting any vapor lock from the bowl by cleaning it up and pulling out the drain screw. Do the same for both carbs. Next mesure the exposed portion of the idle scew by hand and set both carbs exactly alike Also bottom out both airscrews on both carbs and then set them exactly alike makeshure your floats are exactly alike too. After you have everything together pull your slide asy. apart and chech each needle to beshure they are not bent and they are both the same and setup the same. Chech your slides makeshure they are the same. There are shitload if pathways in your carbs and they all must be clean in order to work right. If after all this, you still can't get them to work, you might have faulty carbs and you should send them back.

[williebiv]

I sent the carbs back, the company say one probably is bad and they will check and take care of it.