Engine stumble at mid range cruise
Hello all, just posted in the Newb section a little while back. I'm having some stumbling issues with my glide and it was suggested that I post up over here in the engine section.
I bought a 2006 with 24,000 miles on it about a month ago and have been riding and tinkering with it almost daily. When I got it the intake base was busted so I welded it up. Before I reinstalled it I cleaned the hell out of the intake tube cause it was obvious dirt and debris had been getting around a loose filter for who knows how long. The intake went back together nicely after that.
Next issue was a bad exhaust leak and a broken exhaust stud. I managed to get the stud changed without much issue and a couple of new gaskets had the leaks fixed up.
The tags on the bike say it hadn't been licensed in a little over a year, so I dumped some injector cleaner and sea foam in the tank and topped it off with premium fuel.
I have no idea what has been done to the engine, but I know it isn't stock cause it has screaming eagle parts all over the place. My problem is, without pulling it apart, how do I know what's been done to it? It has cnc ported heads and sounds to me like it has cams in it by the way it idles.
The biggest problem I'm having is a stumble at no load cruising speeds. It acts similar to bad gas but if I hit it hard it clears up and pulls like a freight train. On the freeway it runs great, 2500-3000 rpm it's just happy. Try to cruise through town at 25 and it is pissed! It seems to be the worst between 1500-2500 rpm, stumbling, stuttering and even popping occasionally. It pops and stutters under deceleration also, but I know I don't have any exhaust leaks anymore.
I've been reading up all over the place, and I think tomorrow I am going to check for a broken injector wire. May also pull the fuel pump assembly and change the fuel filter. While I'm in there I can check hoses and the regulator housing.
Some things I've already done include new plugs, injector cleaner, full fluid changes, and checked the battery terminals for corrosion and tightness.
I'm gonna have everything torn apart for a few days to put new tires on and install new brake pads so is there anything else you all can think of that I might have a look at while I'm in there?
Sorry about the novel, but I'm still learning the ways of the Harley.
I've got 2000 miles or so on it already and I'm loving it! Just wish I could fix the stutter and figure out exactly what I have for a power plant!
Harley Newb looking to learn