My 07 surged too, both of them. The techs will tell you it's normal and there is nothing they can do. A SERT will improve it a bit. Forget the "you're lugging it" advice. Many of the fuel injection bikes surge. Do a search, you'll see. HD needs to get their act together on this one.

 

You're lugging the engine. It's very easy to do when you first start riding after a 30 year layoff. I came off a 25 year layoff myself about 3 years ago when I got my Sporty. You've got a young race horse between your legs, but due to your current inexperience, you're riding it like it's an old tired work horse.

Nice lookin scoot btw. Welcome aboard, and enjoy the ride.

 

After rereading your original post, I have to agree, you are lugging the engine. Nevertheless, both of my '07 Harleys surged and I wasn't lugging the engine. Techs confirmed this but said there was nothing they could do as the engine was running as designed, EPA and all. I bought a SERT and it got better but never completely went away.

 

Sorry but lugging the engine is the number one culprit whether its a carbed bike or EFI.

 

I think I know what he's talking about, my wife's new 1200L is doing the same thing. It's at steady speeds with a very low, steady throttle position (maybe 10% throttle)? Almost like it's missing. Add some throttle to it and it smooths right out. Much more noticeable on the Sporty than it ever was on my Ultra.

 

Yup that's it. I think almost all of them do it as I've test ridden and rented several too. Most folks don't notice or don't want to admit it to themself.

 

I have an 01 EFI Deuce and I noticed this too. It's my first Harley so I assumed it was just what they do. Glad to know I was right. I thought it might be the primary chain was loose but it was fine.

 

That's it! I may not be using enough RPM, but I honestly don't think I'm
lugging because there is no sluggish reaction as normally occurs when you
are way behind the power curve, the definition of lugging. When I open the
throttle it reacts smoothly.

I'm going to need to refuel anyway so we'll see if that helps, but it may just
be "one 'o dem t'ings" that the bike is not happy under very low throttle
(lean) steady state conditions. If so, I'll have to find a pattern that works.
Riding faster would probably help a lot...

The responses have been very helpful.

Thanks a lot!

Mike

 

Mike,

I'm in the same situation as you, 30+ years since I've been on a bike. Just got a '09 1200 low in January. I have noticed that I just can't idle along in first with out the bike lugging. To go really slow I need to alternate between giveing it a little throttle and working the clutch.I'm guessing that HD sets the idle to get the "right" HD sound more so than to idle along in first.

Joe

 

My $0.02 is the same as 6o66er's and others....Your lugging it. Give it more throttle and wind the gears out more. Wind first gear out to about 30 mph or so. The rev limiter doesn't kick in until around 50mph for first gear....