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Idle issues

Discussion in 'RX General Talk' started by slalomguy, Apr 29, 2019.


  1. slalomguy

    slalomguy Newbie

    Messages:
    4
    Location:
    Plymouth WI /Eagle River WI
    Country:
    USA
    Snowmobile:
    2005 RX-1 Mt, 2002 Viper 144 M-10 custom Build, 2000 SX-R 2up conversion, 2000 V-Max 600 Dlx, 1996 V-Max 600, 1989 Ovation 340,
    I have an 05 RX-1 Mountain. Purchased last fall with a leaking carb. I dropped off at a dealership for repairs before I took it home. It was fine for about 600 of so miles then started having problems with idle. Suddenly idle is extremely low barely staying running. then a while later it is at 3400 rpm or more wanting to engage clutch. I have since adjusted the idle constantly every ride multiple times a day. Some times it is as simple as wiggling the tube that the cable runs through off of the top of the carb rack. I doo turn off the heated carbs over 25 degrees as that seems to affect the idle also. I have sprayed carb cleaner around the base of the carbs and there is no difference so I do not feel there is an air leak. 4000 miles on sled when I purchased now there is 6600 miles. Any thoughts? This is driving me crazy and I don't think a dealer will have the time to address this as it is always good on first start up it shows up about 30 or so miles in after our first trail side stop to chat. My first indication has been that my yamaheaters were staying on boost and would not adjust. Roc told they will do that when the rpm is below 1300. I now have disconnected the heaters to pinpoint the problem, but the issue is the same for the last 1400 miles with them disconnected. Also there do not seem to be any other fuel issues. MPG seems correct, power is fine, maybe a little hard starting after a stop, have to tap the throttle to start. Thanks Guys
     
  2.  
  3. maim

    maim Moderator Staff Member Moderator Lifetime VIP Member VIP Member

    Messages:
    4,891
    Location:
    sudbury on
    Country:
    Canada
    Snowmobile:
    2016 apex xtx/ 2011 apex xtx/ 2009 phaser rtx/x/ 1997 et410t/r
    tap the throttle to start is normal hot as all the rx sleds had to do this that i ever saw.

    sounding like it still has crud plugging the jets or a vac leak from the carb caps.
     
  4. 74Nitro

    74Nitro TY 4 Stroke Master

    Messages:
    1,406
    Location:
    Dublin Ontario
    Country:
    Canada
    Snowmobile:
    2019 Sidewinder LTX
    Yes, either carbs are out of sync or one or more pilots plugged or partially plugged.
     
  5. Brotherdan

    Brotherdan Pro

    Messages:
    148
    Location:
    Belmont,maine
    Country:
    USA
    Snowmobile:
    2003 rx1er 136"mono 2 rear suspension conversion,muffin works extension, apex seat,apex bars,8"lake effect riser,gytr frontshocks,yamaheater,rocks ridelite,1987 enticer 340ltr 2100miles,1984 enticer 340,1996 wolverine 350,big wheel kit,winch,racks,cai
    What did the dealer do to the sled when you first had the leaking carb issue?had sled been sitting?believe it or not some dealers are not aware that the rx1 has fuel filters in the tank (2)these are not easily changed.do you know if they changed them?also if sled Sat with ethanol fuel in it I'm sure carbs will need to be cleaned again,it's a labor intensive procedure to really clean the fuel system as their are lots of parts involved&a lot of times just the carbs get cleaned.look down in the tank with a really bright flashlight&see if it looks clean (remove the white ring at the top of the filler neck to see better).as maim said the issue with holding the throttle open to start when hot is normal.doesnt take very much crud for idle to be affected.also the throttle cable should be tight down at the carbs&check throttle freeplay at the lever to adjust cable length.also you checked around the carbs for an air leak but check around the air filter itself.the boots can be a bit finicky (also where a bright light helps)make sure they are all seated fully&the clamps are tight.
     

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