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post #1 of (permalink) Old 12-04-2000, 12:39 PM
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no idle,

Im a newbie and have been out of sledding for quite a few years. Just bought a 1999 Yamaha Venture 600-triple
through an auction. It has 190 miles on it and looks very clean. Starts up just fine but will no idle unless the
choke is turned on and then off. Seems to run okay at rpms over 4000, but then will backfire when given throttle.
I have no manuals (yet) and have put new plugs and gas in it. The plugs are black after running it for just a few minutes. This sled probably has been sitting for over a year. I am pretty good working on engines, but I have never
worked on an engine like this. Any ideas where I should start. Also, what type of cleaners to use for the floats
and/or reeds. Also, when its idling without the choke on, it surges to ovr 2000 rpm then completly quits. Does that sound like an air leak to anyone? I have not been able to do a compression test yet. Any advice would be welcome, especially since I dont even know where the air/fuel screws are on these carbs! thanks

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post #2 of (permalink) Old 12-04-2000, 02:04 PM
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Re: no idle,

Sounds like the bowls are dirty and you sucked some garbage into the pilot jets. The backfire at 4000 could also be caused by slight plugging of the mains. This is the place to start to find out what the problem is. To clean the jets out remove them from the carbs and soak them in simple green for a few minutes then just blow them out. Make sure that you check the rest of the carb to make sure there is no dirt stuck anywhere. hope this helps. The black plug problem is related Im sure but if only one or two plugs are fouling your carbs need to be sequenced after you take care of the cleaning.

post #3 of (permalink) Old 12-04-2000, 06:11 PM
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Re: no idle,

Thanks Patrick for the info. Will start there and see what I find in the carbs. The surge in the RPM while trying to idle is whatn had me worried, would hate to burn up the top end if its an air leak. All 3 plugs are black.

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post #4 of (permalink) Old 12-04-2000, 08:39 PM
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Re: no idle,

Try going to www.totallyamaha.com and post on the message board. It is down right now but will be back up soon. They have alot of good info on Yamahas. Maxdlx

post #5 of (permalink) Old 12-05-2000, 11:04 AM
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Re: no idle,

Ill check that site out Maxdlx. Thanks. DB

post #6 of (permalink) Old 12-08-2000, 11:18 PM
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Re: no idle,

patrick......you were right, the pilot jets were all plugged with some white/clear stuff. Looked kind of like silicone. wouldnt come out by soaking and blowing, so I used a single strand of copper wire and that did the trick. It runs
really well now on the stand. Idles and accelerates great! thanks for the help.

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