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General Topics/Tech TipsDiscussion on break in periods, rider comfort, seats and pad suggestions. Tech tips as they become available will be posted here.
Hello, all. I've been having this issue with my 2015 Fat Boy Lo, bought with 6200 miles, now up to 11.4k. for a couple months now. I will start with some background.
I bought my bike last August. I always rode with a full face helmet. One day, I decided to ride without a helmet. And upon accelerating, I heard pinging in my engine.
After doing some research, I took it to the dealer and asked them to take a look at my fuel system. They said I had low fuel pressure, and so they completely replaced my fuel pump assembly, covered under warranty.
I rode it home and noticed the severe pinging was gone. But now I hear something else. It's like a very mild pinging, but doesn't happen every time I accelerate. And it isn't a bunch of pinging coupled together, it sounds like 1 piece of gravel hitting the fender, then its done.
Also, I noticed the bike seems to miss while under steady throttle at low rpms (2000-3000), along with jerking/surging.
I rode my dad's 2007 Night Train, and it has none of these problems. Smooth throttle, very responsive, but it also seems to jerk a little under very slight throttle. Is this just a normal occurrence?
I pulled my plugs and the round part is completely white, and the electrode is a mix of gray and black.
I have a 103 engine, cobra short swept streetsweepers, screaming eagle heavy breather, and vance and hines FP3 tuner.
I tried spraying brake cleaner around all my parts under the tank, like the MAP sensor and intake areas. No change in rpms.
Lastly, when I turn the bike off, the air breather makes a loud sucking noise. Is this normal as well?
Sorry for the long post, I just want to make sure my bike doesn't **** the bed, especially when it may have been something that I could have fixed.
It sounds like it's running lean. I solved that problem with a Power Commander from Fuel Moto but I see you already have a tuner. Maybe you should richen it up.
The sucking sound when shutting the engine off is normal with a low restriction air cleaner.
Thank you for the suggestions do far. Here are my spark plugs. Brand new by the way. Got them from the dealer maybe 2 weeks ago? 6R12, properly gapped by myself, according to service manual.
Get new cam/lifters for starters as the stock cam was made to run on lean side. Ditch the converter if not already done. Get a Powervision tuner and richen it up some.
Chugging is another story and some modify gearing to help.
Mine don't ping and it's same as yours.
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Need Help with 103 running lean
