Engine stumbles
Road Master
Joined: Aug 2008
Posts: 1,246
Likes: 251
From: Belle River Ontario
On one of your runs, go to A parking lot in first gear do some very slow starts, and then put it into second gear and again do some starts, what you want to do is lug the motor it will help fill some of the cells and your bike will run way better at those low rpm’s ...
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Road Warrior
Joined: Sep 2016
Posts: 1,634
Likes: 576
From: Cape Coral Fl
Ok started a new job this past 2 weeks and not much ride time in. However I have auto tuned the bike 6 times and she still stumbles. I noticed that she stumbled at a high rpm also. I was doing appropriately a little over 2800 RPMs in 4th gear just holding there, and low and behold bingo.....stumble. . Can this be my coil? The auto tune just doesn't take care of the problem. Oh pulled the plugs and they look great, so the a/f ratio is looking good.,
Last edited by Tileman2692; Apr 27, 2018 at 07:13 AM.
Road Master
Joined: Aug 2008
Posts: 1,246
Likes: 251
From: Belle River Ontario
Intake leak? exhaust leak? maybe just when its warmed up ....
Not sure at this point...don't think the coil would cause that, if the coil stopped working for instance, then I think the bike would just die...
Wish I could help more...
Not sure at this point...don't think the coil would cause that, if the coil stopped working for instance, then I think the bike would just die...
Wish I could help more...
Tourer
Joined: Apr 2018
Posts: 295
Likes: 111
From: Medina, Ohio
I think I have the same issue going on right now. Doesn't happen at all when I'm getting on it, but at cruising in third or fourth it will kind of lope until I get it more throttle. I just did a .583 cam and I have a fuelpak. I think its the gas with mine. Runs fine otherwise. Mine was in the garage all winter and with the temp changes I think moisture got in there. Run some dry gas or fuel system cleaner with hi test.
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Road Warrior
Joined: Sep 2016
Posts: 1,634
Likes: 576
From: Cape Coral Fl
I had a similar situation with my Sporty, carded motor, ended up being the ICM, and ended putting in a Dynatek 2000 in her and that did the trick, but she's got 55K on her. The Dyna only has little over 23K . Took her for a ride after work for about an hr. Darn....still doing the stumbling thing. Putting on new 10mm plug wires on her tomorrow hopefully that's the prob. We'll see
Seasoned HDF Member
Joined: Dec 2010
Posts: 6,846
Likes: 1,386
From: Florida
If it's not the tune, and large ve jumps, then my guess would be a pinhole leak in the in tank fuel lines, gummed up fuel filter, or fuel pressure regulator.
Does it hard start?
Does it hard start?
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Thread Starter
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Road Warrior
Joined: Sep 2016
Posts: 1,634
Likes: 576
From: Cape Coral Fl
