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Discussion Starter #1
I have a sputtering problem once I get on the road. I have replaced the spark plugs, replaced the fuel and the bike starts right up with the choke out, then after a few I can push the chock in and it will idle. I get on her and start going through the gears (revving the RPM’s) and once it gets in 4th or 5th gear…it will start sputtering and cutting out (sometimes it will completely die). If it dies it will start right back up in neutral and then it will sputter a little bit while I “nurse” her back to my garage. It seems like “once the engine and oil gets hot then I have problems.

I little history…I took my old vance and hines longshots and cut them to be “shorties” about a year ago…I haven’t had any problems with it and have since put about 5,000 miles on her. Last September, I replaced my stock air breather with a Forcewinder XR and took her to Kansas City for a bike show. I rode her there and back (400 miles) and didn’t have any problems…I put her away for the Fall and Winter because I was deployed to the “sandbox”. My wife would start her once every couple weeks to keep the fluids running and battery charged. I took her out last week and stated having the problems I have now.

Since I modified the pipes and replaced the air breather…I have not dyno-tuned her…do you think that has something to do with it and if so what am I to do in the mean time?

Please advise!
 

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What kind of bike and engine setup do you have? It wouldn't be anything with the pipes or breather since you've ridden right after the mods and no complications.

Check into the new members forum and introduce yourself.:nod
 

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I {Heart} Hookers.
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Check into the new members forum and introduce yourself.:nod
+1


It sounds as if you're running out of gas.

It's a 2001 but you never mentioned if it's EFI or carbed?
 

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Discussion Starter #5
Thanks for the comments

It is a carb version and have checked the coil, replaced fuel, plugs and will be taking off the carb an checking jets and diaphram. Hoepfully someones advise will work!
 

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when did it start 4u
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no gas or bad gas.....did you drain all the fuel or just add more ?
 

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I {Heart} Hookers.
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SNAFU organizer
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Working on the theory that this was a problem After the winter set up I'd offer your battery still could be lame or the connections get warmed up and get a little loose. Gunk and junk in your carb and float bowl. I think you got a drain valve on it for the float bowl, open and see what pops out.
 

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when did it start 4u
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yes i see that he worte that he replaced the fuel but does that mean he added more or drained it all out....
 

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I {Heart} Hookers.
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yes i see that he worte that he replaced the fuel but does that mean he added more or drained it all out....
He said REPLACE. To me, that means drain out the old and replace it with new. :thumb

Add means....well.....add.

No worries. Not likely to see him again.
 

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Discussion Starter #12
All,

I thank you for your advise but this is what I have done to date:
1) Drained and cleaned (compressed air)fuel tank
2) Drained and cleaned all fuel lines
3) Drained, cleaned, and inspected fuel supply valve assembly (diaphram not damaged and fuel filter not clogged)
4) Replacaced spark plugs
5) Tested spark plug cables
6) Cleaned Forcewinder XP air breather assembly and replaced gaskets on head intake
7) Rebuilt carb and thoroughly cleaned. I did bump my jets up from stock to 48mm (idle) and 195mm (main). All diaphrams were servicable
8) Disconnected all grounds and cleaned/retightened

After I did all this...I still have the same problem. :eek:(
 

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I {Heart} Hookers.
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31,321 Posts
All,

I thank you for your advise but this is what I have done to date:
1) Drained and cleaned (compressed air)fuel tank
2) Drained and cleaned all fuel lines
3) Drained, cleaned, and inspected fuel supply valve assembly (diaphram not damaged and fuel filter not clogged)
4) Replacaced spark plugs
5) Tested spark plug cables
6) Cleaned Forcewinder XP air breather assembly and replaced gaskets on head intake
7) Rebuilt carb and thoroughly cleaned. I did bump my jets up from stock to 48mm (idle) and 195mm (main). All diaphrams were servicable
8) Disconnected all grounds and cleaned/retightened

After I did all this...I still have the same problem. :eek:
I stand corrected....he returned. :D

http://www.harley-davidsonforums.com/forums/showthread.php?t=3168


Just a thought, but have you tested your coil?

Obscure things to look at:

1.) ignition switch contacts and wiring.

2.) ignition plate wiring. (from cone to harness) sometimes they rub through.

3.) fuel tank vent line blocked, kinked.

4.) non-vented fuel caps.
 

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Discussion Starter #14
Thank you

Dave,

Thanks for the indepth info and it was actually the crank position sensor...go figure. I had an old 72 shovel and I miss her!
 

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Could be the gas tank venting. Did you remove the tank when you drained the fuel? Is the vent line kinked? OR sediment in the tank. Did you flush the tank??
 

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Discussion Starter #16
wild bill - i did not remove the tank but did remove the draincock assembly with fuel filter and cleaned them thoroughly. afterward i installed everything and I put new fuel in the tank. I then took a long hose and created a vacuum by sucking on it and had a constant fuel flow on the output side of the draincock assembly (fuel suppply valve). I have not checked the fuel cap (aftermarket kuryakin) and will attempt to clean it when I get back on friday. sometimes the simplist thing can cause such turmoil. thanks for the advise.

And thank you to anyone who has recommended advise
 

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The Northern Redneck
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on a carbed bike you need to make sure your gas tank vent is not plugged or blocked, sounds like a fuel starvation thing, my buddies 93 Evo softail was doing the same thing....we made sure it was vented at the cap..and bingo. no more sputter, his bike would flat ass die...
 

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Sounds like water in float bowl or bad gas. Drain your float bowl. Try different gas. Change fuel filter. Check air filter.You might have a nest in there.
 

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The Northern Redneck
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That too, from sitting a lot water can condense inside the carb especially if you live in a humid area....the float bowl could be poluted with water buildup....that messes up everything when it comes to running smooth... Thanks Badinfluence...
 

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Dave,

Thanks for the indepth info and it was actually the crank position sensor...go figure. I had an old 72 shovel and I miss her!
That kinda makes sense. I suppose it could bugger up after sitting up over a couple months too.
 
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