Bike Stumbles just off Idle - Victory Forums - Victory Motorcycle Forum
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post #1 of 33 (permalink) Old 08-09-2012, 10:30 AM Thread Starter
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Default Bike Stumbles just off Idle

I'm having an occasional problem with my XC and I'm hoping that some of you guys have had this problem and fixed it or maybe KevinX will chime in. I didn't find anything in a search.

My XC has RPW exhaust, Vic performance air filter, PCV, and was dyno tuned by a local guy. I have a problem with my bike stalling and dieing only very occasionally. It only happens after the engine is warmed up and I have usually been riding down the highway at a constant rate of speed when I come into a small town that has a stop light that I have to stop for. So I'll slow down and stop at the light and wait. Every once in a while I'll go to take off when the light turns green and the bike will stumble just off idle and die. It usually happens while I'm slowly releasing the clutch and simultaniously giving the bike throttle. It's like it hits a weird spot in the fueling and the bike can't take any load while idling so it just stalls when the slightest clutch friction is applied.

Note that this is not a throttle blip issue because most of the time it happens before I even open the throttle. But it acts the exact same when I blip the throttle at idle and the bikes dies. And the funny thing is that the bike is always hard to start just after it happens. It acts just like the bike got too much fuel and flooded out a little bit. And restarting the bike is just like starting a bike that has been flooded (hard to start, stumbles a little bit, and a little rough at first but then smoothes out).

Have any of you guys had this issue or have any idea of what it may be? It doesn't happen very often but it is starting to get annoying when it does happen. I have thought that there could be two possible solutions. One could be to get Lloydz idle air control valve. I figure that since this happens at idle and it acts much like a throttle blip then the idle air control valve may help fix the problem.

The other solution I thought of would be to start adjusting the fuel tables on the PCV at idle to see if I can fix the problem. The only problem with that is that I don't feel completely comfortable just messing with the fuel tables and it may be a month before I experience this problem again it is hard to tell if I actually fix the problem until I put a couple of months of riding on the bike. But since I feel like the bike is stalling because of too much fuel I thought that maybe taking away fuel at idle to see if it helps.

Anyone have any experience with this or have any suggestions? Thanks.

2011 Cross Country
-Cee Baileys Windshield & Lowers. Victory Lower Bag Rails, Driver And Passenger Backrests.
-RPW Exhaust, Lloydz Air Filter, VM1 Cams, ATS (Timing Wheel), 1/4 turn throttle & IAV. PCV with Custom Tune by Coweta Customs.

105.2 HP & 127 Ft-Lbs on a Dynostar (Eddy Current) Dyno.
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post #2 of 33 (permalink) Old 08-09-2012, 04:48 PM
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I get that on my pin at times. Not sure what I do to remedy it, I think I added some green on my VFC3.

'09 Kingpin 8-Ball...Sanded chrome exhaust, Stage 1 slipons, VFCIII, Lloyds IAV, Stonny's 27" sissybar, Edge bags with ghost brackets,Kuryakyn black ISO grips,

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post #3 of 33 (permalink) Old 08-10-2012, 01:55 AM
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I guess the first place I'd look is in the fuel tables to see if the dyno guy made any modifications to that table in the idle range. From my experience, they're not necessary. My maps (front and rear) are zero'd out in the 0% throttle position below 1000 RPM and it idles just fine. If that's not it then it might be something more mechanical in the fuel feed system. Put some Seafoam through your system and see if it clears up.

2012 Victory High Ball
Victory Stage 1 swept pipes and performance air filter
PCV and Autotune
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post #4 of 33 (permalink) Old 08-10-2012, 03:12 AM
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Miles since last TB cleaning? May not have anything to do with it but I know after I cleaned mine, I lost that little dip in the idle around town and hardly ever had any long starts afterwards.

Just curious as to your idle RPM 1000, +/-50 when its hot and rolling back to idle at the light??

Im with the seafoam recommended by Dundin too, made a noticable differnce first time I ran it.

I could be in left field but thought I would ask.... Good luck and keep us posted!!!!!

Tim

2011 White Vision - Nuvi 550, Lowers, Lloydz 2nd filter, Vic perf filter, CB/Icom, 96 Brake LED's, Clear Signal lens/Switchbacks, VIC Hwy Pegs, Stebel Horn, 7Jurock 15" Shield, PCV, Lloyd ATS and Variable intake, Ness honkers

2004 V92 TC - S1 flash, level 1 slip-on, Ness big sucker K&N, ISO Grips, 4x1.5 Highway Hawg Risers, extra chrome (never too much), JM 2k CB 4' antena, Mustang seat, HD Front TS & Lowers, OD Pulley

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post #5 of 33 (permalink) Old 08-10-2012, 09:16 AM Thread Starter
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I'll check the fuel tables this weekend and see if the dyno guy made any changes to the fuel tables at idle. I don't remember the bike doing this before I added the PCV but to be fair I put the PCV on the bike right after initial break in so the bike has had the PCV on it for most of its life.

Since I've had the bike for less than a year I haven't cleaned the throttle bodies yet but the bike does have 12,000 miles on it. And running a can of seafoam through the fuel system every couple of months is never a bad idea. I'll try the seafoam first and maybe clean the throttle bodies after that if I'm still having problems.

I can't remember specifically what the rpm's are when I'm sitting at the stoplights but I do know that they are not dropping below normal. I think they are around 1000 - 1100 rpm but don't quote me on that.

Thanks for the suggestions guys. Hopefully I'll get this figured out.

2011 Cross Country
-Cee Baileys Windshield & Lowers. Victory Lower Bag Rails, Driver And Passenger Backrests.
-RPW Exhaust, Lloydz Air Filter, VM1 Cams, ATS (Timing Wheel), 1/4 turn throttle & IAV. PCV with Custom Tune by Coweta Customs.

105.2 HP & 127 Ft-Lbs on a Dynostar (Eddy Current) Dyno.
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post #6 of 33 (permalink) Old 08-23-2012, 12:37 PM
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Your not the only one with this issue . My 09 jackpot does it, my buddies 08king pin does it. I have a guy I ride with that has an 12 "spaceship" (vision) lol and another with a 12 xr and they all do it. Our dealers say its the nature of the beast. I don't believe it. I have an 07 hammer and it has never done it! I think it has somethig to do with when victory went from open to closed loop on 08 and newer. Damn the EPA. I'm curious as to what Kevinx has to say or if anyone has fixed this.

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post #7 of 33 (permalink) Old 08-23-2012, 04:22 PM
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What about a IAV from Lloydz

2008 Vision
Mpls, MN.

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post #8 of 33 (permalink) Old 08-23-2012, 04:51 PM
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Somebody completely screwed the pooch with the tune

I'm not an asshole...I just type that way
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post #9 of 33 (permalink) Old 04-25-2013, 03:49 AM
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My 2013 XCT stumbles and at times stalls also. It pisses me off as it only happens when your not ready for it.

I figured the problem was with the IAC. so I blocked the air line to the IAC.....By doing this I would be assured that a lean condition was the cause. But not so it still did it. So I cranked up the fuel controller and it still did it. I had the fuel ratio set very rich and this stumble never changed.

So if its not a lean condition caused by the IAC what the hell is it.

Rob


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2010 V Star 650 Custom (Wife's)
2013 XCT 2013 Suzuki KQ750 AXI Power Steerring
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post #10 of 33 (permalink) Old 04-25-2013, 06:41 AM
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Quote:
Originally Posted by Jackpot2009 View Post
Your not the only one with this issue . My 09 jackpot does it, my buddies 08king pin does it. I have a guy I ride with that has an 12 "spaceship" (vision) lol and another with a 12 xr and they all do it. Our dealers say its the nature of the beast. I don't believe it. I have an 07 hammer and it has never done it! I think it has somethig to do with when victory went from open to closed loop on 08 and newer. Damn the EPA. I'm curious as to what Kevinx has to say or if anyone has fixed this.
Mine does NOT do this, and it never has!

I'm gonna suggest checking all battery connections and replacing the main (breaker?) relay. These two things have been known to cause the bikes to stumble or die out sporadically. They are easy to fix. Tighten battery cables and go buy a replacement relay for $8 at the local auto parts store.

2011 Silver/black Vision, Ness Big Honkers, Ness Twin Sucker, PC-V w/AT, Lloydz VM1-DR cams, Lloydz Adj Intake, Lloydz Variable Timing Wheel.

2006 110" (133hp/142tq) +nitrous Kingpin (sold)
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