Weird throttle slack issue, not the normal problem

roy

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This morning my bikes throttle was dong something weird. I have not rode the bike in a few weeks since coming back from Moab with it. It was warming up this morning and when I went to give it throttle I had a lot of slack in what seemed to be the cable. I mean a lot of slack. I twisted the throttle a few time and it suddenly went back to normal. I was running a little late for work so I decided to ride on and look into it later today. Well first stop I come to the slack is back, I twist it a few times and back to normal. Bike is running fine, no weird idle or problem with throttle returning to close on it's on. I get to work and kill it then try to get it to do it again and it wouldn't do it. Seems this is only happening with it running. Anyone had anything remotely close to this issue happening with your throttle.

I got to thinking later this morning isn't this a fly by wire system somehow? I have never looked into how this works. I have never really looked at the throttle bodies closely either since I have never had any issues with them to date. I have sync'd the TBs a few times over the 38k mile life of the bike. They were cleaned at the 25k valve service interval by the shop who did the valve lash service. I do ride it off road quite a bit and just returned from Moab where I did some dusty off road. No issues until this morning and not even sure that is related. I do have the OEM heated grips with the stupid first generation disaster cable mess in the throttle housing but I do not think that is the issue on this just throwing that out there.

I am kind of thinking it is something down new the throttle bodies causing this but like I said I have never paid them much attention so do not fully remember their mechanics until I look into it later today when I lift the tank.
 

vwboomer

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Aug 27, 2015
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roy said:
This morning my bikes throttle was dong something weird. I have not rode the bike in a few weeks since coming back from Moab with it. It was warming up this morning and when I went to give it throttle I had a lot of slack in what seemed to be the cable. I mean a lot of slack. I twisted the throttle a few time and it suddenly went back to normal. I was running a little late for work so I decided to ride on and look into it later today. Well first stop I come to the slack is back, I twist it a few times and back to normal. Bike is running fine, no weird idle or problem with throttle returning to close on it's on. I get to work and kill it then try to get it to do it again and it wouldn't do it. Seems this is only happening with it running. Anyone had anything remotely close to this issue happening with your throttle.

I got to thinking later this morning isn't this a fly by wire system somehow? I have never looked into how this works. I have never really looked at the throttle bodies closely either since I have never had any issues with them to date. I have sync'd the TBs a few times over the 38k mile life of the bike. They were cleaned at the 25k valve service interval by the shop who did the valve lash service. I do ride it off road quite a bit and just returned from Moab where I did some dusty off road. No issues until this morning and not even sure that is related. I do have the OEM heated grips with the stupid first generation disaster cable mess in the throttle housing but I do not think that is the issue on this just throwing that out there.

I am kind of thinking it is something down new the throttle bodies causing this but like I said I have never paid them much attention so do not fully remember their mechanics until I look into it later today when I lift the tank.
Not really. When I did the TB spring mod it wasn't what I expected. There is the normal two cables going to the linkage like on any other bike. It's possible one of your cables has a nick on it, or the spring is binding up. Lift the tank, and have a look.
 

roy

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Joined
Oct 19, 2010
Messages
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Mississippi
The system is a ride by wire. Still uses cables to a reostat box on TBs.

It has not acted up again since cutting it off and back on that first day. May have just been a one time deal since I had been switching back and forth on drive modes the last time I rode it weeks before this appeared. Bike runs fine so I am not going to worry about it too much. If it acts up again I will look closer into the box on the TBs as the possible culprit.
 
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