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Kawasaki KFX700 V-Force Kawasaki's big-bore, V-twin sport machine!

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Old 03-15-2010, 12:04 PM   #1
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Default Won't idle without choke on

Hey Guys! I'm back!

It's been almost 5 years since my last visit!

I went and pulled my V-Force from storage. I think it had about 10 hours of run time before I had to store it. Only to find that it will not run properly without the choke on. Among other things, I replaced the battery, added new fuel, oil, and coolant. She cranks up immediately but I cannot open the choke without it stalling.

Surely a fuel starvation issue. I put some Sea Foam in the fuel and ran it for about 30 minutes but that did not clear the issue. The carbs and filters (including fuel) are factory clean.

Any suggestions short of pulling the carbs and doing a thorough cleaning?
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Old 03-15-2010, 12:20 PM   #2
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Did you drain the gas from the carbs before storage? If not, you're probably gonna have to pull them and clean them. I worked on an older Polaris that had been stored for several years - looked like shellac in the carbs.
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Old 03-15-2010, 12:26 PM   #3
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Sounds like dirty jets. Pull the float bowls and check the main jets. Probably filled with gunk.
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Old 03-15-2010, 12:26 PM   #4
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Yeah, I didn't drain them. Just drained the tank, put a little fuel stabilizer in and stored. I really didn't expect it to be in storage so long.

I did drain them before cranking it back up. The fuel was yellower than normal for sure and didn't smell much like gasoline. I was hoping the Sea Foam would break any shellac'in down.

I'm a good mechanic but not alot of carb experience. Too many tiny parts to get misplaced.
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Old 03-15-2010, 12:30 PM   #5
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Quote: Originally Posted by Black-V View Post
Sounds like dirty jets. Pull the float bowls and check the main jets. Probably filled with gunk.
I agree. Pull the bowls and main and pilot jets, soak them in carb cleaner, then blow out with compressed air. Hold up to a light and see if you can see through them.
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Old 03-15-2010, 01:44 PM   #6
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Thanks guys,,,, I'll give that a shot this weekend.
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Old 03-15-2010, 01:57 PM   #7
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u might try putting staight race fuel in tank drain carbs until ur sure race gas in coming out let sit for 24 hr drain again and let sit another 24. did this on my shelby that had almost full tank of gas when stored,,, less than 1/4 when it came out of storage. first round came out discolored yello 2nd round came looking like fresh fuel, filled tank with ethel gas and fired her up no problem and a whole easier than pulling tank out of car
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Old 03-15-2010, 03:49 PM   #8
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I think I'm going to have to de-varnish the jets. Unfortunately I had a KFX50 and a tiller in storage with it also and they are suffering from the same problem.

Man that gas stinks when it gets varnished too...
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Old 03-15-2010, 07:29 PM   #9
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Quote: Originally Posted by Delmustator View Post
Man that gas stinks when it gets varnished too...
Good to dump in someones yard that pissed you off though..
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Old 03-16-2010, 07:37 AM   #10
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I have seen this at the Dealer. Yamaha Carburetor Cleaner Dip At Parker Yamaha.com I know it's Yamaha, but it works really well. You can run it in the fuel line and let it sit over night and drain, or if you have it off fill up as well as soak over night in solution. cleans it really well.
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