I ran my viper today, and I'm having idle issues again. I wouldn't think the pilots would be clogged already, but I have a high idle. When you let it idle to warm up it runs about 2000-2100 rpm. If you give it any gas it will slowly come back down and settle around 2500 rpm. Then, if you go out and ride it for awhile and stop, it will move between 3500 and 4000 rpm until you hit the choke to slow it down, and then it will sit at 2500 rpm. Fuel screws are set at 2 turns out. What else could be going on? I suppose I'll pull the carbs and go through the idle circuit again...could this be in any way related to running the machine with a double shot of oil for the first few break in miles? I did foul a plug then. I'm running the regular ratio now though. 
If it does this after you warm up and ride the sled, its because the pipe is up to operating temp and the motor requires more fuel, the flatslides are known for this, they are lean in the pilot circuits. If it does this on a cold start up right out of the trailer then I would double check for airleaks with some carb cleaner around the reeds/carb boots and if all is ok, run the fuel screws out to 2.25turns, if it still hangs, install next bigger set of pilot jets and start off around 1.5 turns out.
also try and set the idle for 1600-1800rpm, with warm engine.
also try and set the idle for 1600-1800rpm, with warm engine.
mopar1rules
Active member
I had the same thing happening on my dad's v-max and the throttle cable was to tight. otherwise as mrviper stated, adjust fuel screws and check for air leaks.
I took the carbs out and cleaned the pilot circuit though it was all clear, then I set the fuel screws at 2.25 turns out so I knew I wouldn't be lean. I started it up and it wanted to idle above 2000 again, so I set the idle speed down to about 1600. Then I set the oil cable and throttle play to spec. I took it out for a short ride but got it good and warm, and now it idles nicely at 1800 rpm. It doesn't hang either, you can rev it up and it comes down fairly quick. I might be a little rich in the pilot circuit right now at 2.25 turns out, but I was able to snap the throttle open from idle with no bog. It was also almost 40 degrees F outside, so it should only get leaner as the temp goes down right?
Thanks alot for the help guys.
Thanks alot for the help guys.
daman
New member
Yes you are right, sounds like you got her pretty close, good...
try to keep idle at 16-1650-17..
where's your oil cable @??
try to keep idle at 16-1650-17..
where's your oil cable @??
mopar1rules
Active member
spec on the idle is 1800rpm
daman
New member
I know,, but i find allot of time thats almost to high,come to a stop and she'll drop like a rock to idle..
I've got the oil cable right on 20mm. Maybe I could drop the idle a little bit more, it runs 1600 when it's cold and 1800 when it's warm. I'll mess with it a little. I should have it all ready to go now though.
I noticed this morning that I could see antifreeze around a few of my head bolts, though I checked the torque and they were all still tight at 20 ft. lbs. also I saw a little green at the head gasket on 2 of the cylinders. This is a brand new head gasket and the cylinders and head were cleaned before installation. I didn't use gasket tack, but I shouldn't need to with the new gasket. Will this go away once the motor gets run more, like is it a heat-break-in thing that helps it seal?
I noticed this morning that I could see antifreeze around a few of my head bolts, though I checked the torque and they were all still tight at 20 ft. lbs. also I saw a little green at the head gasket on 2 of the cylinders. This is a brand new head gasket and the cylinders and head were cleaned before installation. I didn't use gasket tack, but I shouldn't need to with the new gasket. Will this go away once the motor gets run more, like is it a heat-break-in thing that helps it seal?