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Old 04-03-2015, 05:27 PM   #1
sweenrace OP
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Location: Oakland, Ca
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Gasgas suddenly wont idle

Folks,

I was at an event last weekend and after about 20 sections the bike began to not idle. It caught me out one time as i was rolling down a steep hill with the clutch in and it stalled. The fact that it stalled with the clutch in and it didnt feel like there was any clutch drag suggests it intake related? We were at about 1000ft.

The bike is a 2009 GasGas 280. What should I be looking at to try to diagnose the issue?

Thanks!
Ian
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Old 04-03-2015, 05:33 PM   #2
lineaway
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Start with a good carb clean.
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Old 04-03-2015, 05:52 PM   #3
sweenrace OP
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The plan is take it apart to give it a clean but I wanted to try to diagnose the issue before taking it all apart. Any suggestions of things to look at before I breakdown the carb?
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Old 04-03-2015, 05:53 PM   #4
Brewtus
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Quote:
Originally Posted by lineaway View Post
Start with a good carb clean.

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Old 04-05-2015, 07:43 AM   #5
motobene
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Quote:
Originally Posted by sweenrace View Post
The plan is take it apart to give it a clean but I wanted to try to diagnose the issue before taking it all apart. Any suggestions of things to look at before I breakdown the carb?
A quick diagnostic is raise the choke lever when riding. If that fixes it temporarily clean the carb.

Another is remove the air or fuel screw and don't lose any parts and stick a pressurized air nozzle in the hole and give it a pulse. Same thing. If it gets better clean the carb, checking every circuit.

So... might as well clean the carb!

motobene screwed with this post 04-05-2015 at 08:40 AM
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Old 04-05-2015, 08:27 AM   #6
DerViking
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A sudden change like that suggests a booger jammed a circuit. I doubt you will actually see anything when you clean it. But, maybe. I found a chunk of cinder in my old wr. Might be worth flushing and dumping the fuel tank while you're at it. Crap can accumulate around the petcock.
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Old 04-12-2015, 05:43 PM   #7
sweenrace OP
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So, I didn't find anything specific but cleaning it out seemed to do the trick. I did not adjust anything, nor did I see anything in the carb but its running fine now!
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Old 04-12-2015, 06:21 PM   #8
baloneyskin daddy
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Were you running gas with ethanol in it?
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Old 04-13-2015, 12:36 PM   #9
motobene
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Originally Posted by sweenrace View Post
So, I didn't find anything specific but cleaning it out seemed to do the trick. I did not adjust anything, nor did I see anything in the carb but its running fine now!
Awesome
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Old 04-13-2015, 02:29 PM   #10
sweenrace OP
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balnoey_skin: Not sure if there was ethanol in it but the gas was from the usual Chevron that I get it from.
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Old 04-13-2015, 02:34 PM   #11
motobene
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balnoey_skin: Not sure if there was ethanol in it but the gas was from the usual Chevron that I get it from.
Irrelevant to the problem you had. The only time it is a factor is if the fuel got more water in it than the <10% ethanol can absorb, and then it is allowed to stew and brew up nasties.

Yesterday my wife put water form a white container into our Yamaha generator. That was fun (not).
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Old 04-13-2015, 06:12 PM   #12
lineaway
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I use a gas can for my shower water. Confuses the shit out of everyone when I start pouring it over my head. I think I`ll start bringing my foot long lighter that looks like a matchstick on steroids.
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