Kawasaki Concours Forum
Mish mash => Open Forum => Topic started by: Awaz on June 24, 2014, 08:44:21 AM
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Still trying to fix up my little KZ 250. Question on carb: what makes the carb flood real bad when you choke it? I mean it is so bad that gas pours out the overflow tubes and possibly fills the combustion chamber. I mean I have to shut off gas, keep cranking until gas comes out the exhaust. Then start the bike with no choke. Is the choke circuit gone fubar on the carb? Fixable? Replacement carb suggestion (no response on Kzrider.com)?
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I would look at float/needle valve. If that is leaking, gas will just pour into the carb. May work ok when running as the engine is burning the gas. But starting/idle, too much gas. A float can be compromised such that it no longer floats or the needle is not sealing properly. If you leave the gas shut off open with the bike not running and gas drips out of the carb, your float/needle valve is bad. My DR650 will drip if left for an hour or 2 if gas not shut off. The bike runs and starts fine but more leakage then that will flood the carb.
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What Rhino said, my KTM will drain itself overnight if I do not turn the fuel off. Too lazy to pull the carb, may actually do it this weekend..
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I do not remember seeing the motorcycle dripping gas when parked...but who knows...I have a Harley Davidson parked next to it.
Happens only when choked. But I have the carb off the bike and will take a look. Looks like it is hard to get resources on that particular bike.
While we are at it, before I parked it for good for repair/restore, it developed a diesel noise. No loss of power though. Thought it was cam chain, but it looks good. Thought it was the starter chain, but that looks ok as well - there is some slop to it, but measures up as per the specs in the manual. So now taking the top end off and just going to put some fresh gasket and stuff, blow out oil passage and what not.
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What year is the bike? A pre-alcohol float that is saturated with fuel?
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Since it floods only on choke I don't think it would be float/needle.
This says look at the choke circuit. If it uses a choke plunger the o rings are shot.
If it uses a jet I would check to see if it's still in place.
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The carb is coming apart this weekend.
@gpink, the bike is either 1980 or 82.
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Just a single carb? Shouldn't be that hard to overhaul if you can find a kit.
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Yes single carb - single cylinder engine.