I am asking this question for 2 buddies of mine. One has a Street Bob and the other on 05 Dyna Super. Both have nearly the exact same experience.

Taking the bike up to 180 KPH (112MPH) with the throttle wide open the bike seems to stop pulling at the same rate, but if they back off...one said just a bit and the other said !/4 of a turn...the bike starts to really pull again...

What is causing the above to happen and what can be done to correct it. IS there anyting short of a stage 2 kit that can correct it? Would something like the PC3 or TFI solve this?

 

Don't know the answer to that, but I have a stage I and never noticed anything like that, not that I often ride that fast.

 

I am certainly no expert but I know that my new PC III has you set both the closed and full open throttle postions. I am sure that is important for fuel mapping. I have read that a lot of drivability problems are related to improper throttle position calibration......

 

While we're on the subject of PCIII's and mapping, I have to say I've cut my bike off about 3 times now while in first moving from a dead stop. I guess it's dumping more fuel now as opposed to its old lean condition, but it ain't fun to all of a sudden be NOT running with a green light in front of you and an Excursion with mom and the kids behind you.

 

They probably have a rev limiter in the cumputor system. It could have a speed limiter to in the system. My Tahoe can't get over 100 MPH.

 

It's a tuning issue. By releasing the throttle just a hair, you're altering the Air to Fuel ratio; basically cutting the amount of fuel. This makes the bike's engine run leaner, and lean always makes more power, but lean also causes detonation, and causes an engine to run alot hotter. So....what's the deal? Your bike is probably running a little rich at WOT (Wide Open Throttle). This is fixed on EFI bikes by using the Screamin' Eagle Race Tuner (SERT), or a Power Commander. To really benefit, either system needs to be tuned on a dyno. Most larger Harley Shops have a dyno, just check around. It's gonna cost some money, but more power always does...[]

Carburated bikes compensate by changing the jets in the carburetor...[&:]

joe

 

Why, Oh why do you want to go 100mph plus ?

 

Weird things usually do happen when you have a cruiser running over 110 mph.....

 

traveler is correct

 

I have to agree with WTF are you doing that speed for? 65mph is fast enough to die?? I think, you must be hitting the rev limiter?