Hello Guys I Have A Question About A Hanging Idle. I Took 3 Weeks Off And Went Up North For A Ride. When I Got To The House I Unload My Sled It Was Running Like Shit. I Had Parked The Sled With A Full Tank And Had Treated It Prior To Storage With Startron. Any Way I Pulled The Carbs And Cleaned And Reassembled No Major Differance So I Ran To Gas Station And Filled Up With Fresh Premium. The Sled Then Started To Pull Out Of It And Run Much Better. After 2 Days And 300 Miles She Is Running Great But I Am Getting A Hanging Idle Any Where Between 2300 And 3300 Rpm After Normal Trail Riding. Could My Secondary Clutch Be Causing This? Im Pretty Confident Its Not The Carbs I Cleaned Them For Years And Never Had A Problem. But I Will Admit I Dont Know Too Much About The Clutches! Thanks
Ps O2 Viper All Stock For The Motor And Carbs! Thanks
Ps O2 Viper All Stock For The Motor And Carbs! Thanks
VenomMod
New member
1.)Check your carbs again. Make SURE the pilots are clean.
2.)May have to turn your fuel screws out.
2.)May have to turn your fuel screws out.
sounds like your pilot screw is not set correctly ....
harness racer
New member
Good Chance One Of Your Boots Is Not On Correctly Or Slid Off A Carb A Litlle
mopar1rules
Active member
clean pilot circuit/pilot jets and set fuel screws to 1-7/8 to 2 turns out from lightly seated.
daman
New member
Thanks For All The Advice Im Going To Check All The Above I Know The Piolts Are Clean But I Will Pull Them Again And Double Check. The Fuel Screw I Set At 2 Turns Out But I Will Do It All Again! I Will Check Back! Thanks
Millinocket Rocket
New member
I've tried all of the above with no luck, including going up one size on my pilots to 47.5's. Here is a quote from Betheviper, and it worked for mine:
"Put the 45pilots back in, its not that the sled is lean at idle, what is going on is that the pipe is making it idle high. Pipes have more than one rpm where the resonance works out to be efficent. It happens to be on this sled that the stock pipe is also efficent at around 2-2500 when the pipe is hot. so what happens is you ride fast or hard, keeping the pipe hot, then come to a stop and let off the gas. As the engine passes down through that rpm, it is so efficient there that it doesnt need alot of fuel to stay there. the reason flipping the choke makes the rpms drop is it is adding enough fuel to cool the pipe at the same time it is flooding the motor, making less power and allowing the engine to drop rpm.
the only fix is to idle the sled to 12-1500, usually works."
I know it idles a little rougher at 1200 rpms, but it sure beats blipping the choke every time you stop. And it's also very simple!
"Put the 45pilots back in, its not that the sled is lean at idle, what is going on is that the pipe is making it idle high. Pipes have more than one rpm where the resonance works out to be efficent. It happens to be on this sled that the stock pipe is also efficent at around 2-2500 when the pipe is hot. so what happens is you ride fast or hard, keeping the pipe hot, then come to a stop and let off the gas. As the engine passes down through that rpm, it is so efficient there that it doesnt need alot of fuel to stay there. the reason flipping the choke makes the rpms drop is it is adding enough fuel to cool the pipe at the same time it is flooding the motor, making less power and allowing the engine to drop rpm.
the only fix is to idle the sled to 12-1500, usually works."
I know it idles a little rougher at 1200 rpms, but it sure beats blipping the choke every time you stop. And it's also very simple!
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^^^^ Yep x2^^^ Mine did the same thing. Turned down the idle and no more hangin
kampkoleviper
New member
Try cleaning the throttle return spring mine was all gummy and had the same high idle prob. spray it with a brake cleaner then work it hit it with a little wd-40 blow off the excess.
hereismylife
Active member
Millinocket Rocket said:
Thanks for the info on this. I would of never guessed this would hang the idle on a stock sled. But if it did not do this from day 1 why would it just start to happen out of the blue..hhhhmmmmm
Thanks For The Info I Re Cleaned Again All Is Fine Im Going To Fatten Up The Piolt I Guess And See If It Helps. Maybe The Pipe Changes With Age Or Miles It May Break In Or Get Hotter With Age Who Knows But Its Frustrating Know I Take Good Care Of The Machine. Thanks
Millinocket Rocket
New member
jdp1under said:
Maybe the pipe gets more carbon builup as it gets older and insulates better? I know when it was warm out mine did it worse-- you'd think if it was a lean condition, it would do it worse the colder it gets out, making it run even leaner....don't know if I'm on the right track or not??
Millinocket Rocket said:
Thank you for this. I finally have a solid reason as to why my idle hangs. I've been chasing my tail on that for the past year with my viper and can find zero evidence of a lean condition, carbs cleaned at least 3 times, different fuel screw settings, throttle play adjusted, etc. I saw no reason why a stock engine should need oversize pilots to run normally, and now I'm glad I didn't buy them. Piston wash and plugs look good and the sled runs great!
bluwulff9
New member
I agree mine would hang for a while but I turned down my idle to about 1200 rpm and it runs great. When mine is cold it will still idle at about 1600-1800 rpm but once she was warm she would drop down.
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Millinocket Rocket
New member
No prob-- Thank Betheviper!
98slushbucket
New member
I would recommend using silicon lubricant instead of WD 40. WD 40 attracts dirt where as silicon repels water and leaves it film free. Been using it for 20 years haven't had a stuck or frozen throttle since!
Cool.... This is my first year with my viper and I had the carbs cleaned at the dealer because I did not have the time to do it and my idle always hangs after a hard ride..... Gonna have to try lowering the idle..