Sensitive throttle by wire
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Cruiser
Joined: May 2016
Posts: 146
Likes: 13
From: Memphis
I just did about 40 miles give or take. It was a mixture of town/stop and go and a bit of highway. The beginning of the ride was just the same as before and I paid particular attention to how hard I was gripping and wrist position. By the end of the ride, I must say things smoothed out considerably and it was quite pleasant to ride. I'm sure time will be my guide as to whether or not it is still jumpy enough to warrant another solution, but for now I am sticking as is.
I'm so happy I put these bars on, and now it seems I'll be able to enjoy them.
I'm so happy I put these bars on, and now it seems I'll be able to enjoy them.
Stellar HDF Member
Joined: Mar 2006
Posts: 2,395
Likes: 153
From: Utah
Ummm... most HDdealers don't seem to know about this... and V&H has 'progressive' throttle control built into their fuel pack. The problem with HD's design is that they aren't sampling enough and so the throttle over-reacts to quick movements... in other words, from 1-3 and you get thrown forward and backward with the road bumps on a stock harley... from a better algorithm that works like: 1, 1.5, 2, 2.5 you don't... unless of course you go all the way to 3 but you can adjust that with the fuel pack. I don't think spending $400 to fix a bad design (dangerous, actually) is fair. HD needs to re-do this concept but I'm pretty sure that they would have to replaced the BCM which they aren't going to do.
Ultimate HDF Member
Joined: Dec 2010
Posts: 7,776
Likes: 2,252
From: wet coast BC
OP, is there any lateral movement (more than necessary) on the throttle grip, side to side. I ask because after a re install I did not get it on tight and found the same description you have. made it tighter and all good.
Stellar HDF Member
Joined: Mar 2006
Posts: 2,395
Likes: 153
From: Utah
Mine is stock... so it had to come from the factory with this defect I think. Only different is that the LHCM and RHCM include police functions rather than what comes as stock and I don't think that the dealers set those up but I could be wrong...
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Cruiser
Joined: May 2016
Posts: 146
Likes: 13
From: Memphis
Originally Posted by 1Canuck
OP, is there any lateral movement (more than necessary) on the throttle grip, side to side. I ask because after a re install I did not get it on tight and found the same description you have. made it tighter and all good.
Fingers crossed...
As far as resetting the system, no I didn't do that. I guess you need to if the wires are unplugged? Or is it if the fuse is removed?
Intermediate
Joined: Jun 2016
Posts: 33
Likes: 3
From: Ct
I checked this. It did appear there was a lot of movement so I loosened everything and did the best I could pushing it on the bars a little further. Sure enough, it made a world of difference. There is still a slight amount of play and a bit of jumpiness to the throttle.........
Road Captain
Joined: Dec 2014
Posts: 691
Likes: 35
From: Colorado
SEPST can adjust the progressivity throughout the speed/RPM range. If it's set at a constant value across the board, ( say, setting at 100% [99] in all fields) you're gonna have problems. Low RPM needs a little "slack", a lower % to keep it from being over-sensitive at low speeds. Higher RPM, you want it "tighter", a higher % (99) for quick response when you're cruising at higher speeds.
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Stellar HDF Member
Joined: Mar 2006
Posts: 2,395
Likes: 153
From: Utah
SEPST can adjust the progressivity throughout the speed/RPM range. If it's set at a constant value across the board, ( say, setting at 100% [99] in all fields) you're gonna have problems. Low RPM needs a little "slack", a lower % to keep it from being over-sensitive at low speeds. Higher RPM, you want it "tighter", a higher % (99) for quick response when you're cruising at higher speeds.
Stellar HDF Member
Joined: Mar 2006
Posts: 2,395
Likes: 153
From: Utah
I've had this problem on every bar replacement with TBW. Some were HD bars, others were aftermarket but always the same problem. For me it has more to do with how snug the grip is on the bar itself. On one set of bars I wrapped one layer of electrical tape on the bar and then slipped the grip over it. That added enough tension on the grip so it wasn't so sensitive without binding it up. But it only worked on that particular bar. On another set of bars I pulled the controls up the bar as far as I could. That helped to 'pull' the grip onto the bar and keep tension on it, that firmed it up. For some reason other bars were a lost cause and I learned to live with it. Very aggravating.
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