I stand corrected and apologize! My reply was based on the (small amount) of facts presented in your original post presented, that and you being a 1st time poster on this forum. Guarantee, if you'd been one of the "regulars" here with the same posting, the replies would've been more "helpful".

Sorry for your injuries and hope you heal up soon!

I'm no wrencher, but my guess is it has something to do with a mechanical failure as a result of the bike not being ridden much. I've seen numerous things fail just as much from lack of use than from over-use.

 

Sudden acceleration on a TC88 is almost an oxymoron.

Seriously, I had that happen once while pulling the front brake and inadvertantly increasing the throttle while downshifting into first. I'm more careful now.

Otherwise, a broken throttle return spring may have been the culprit, though you probably checked that after inspecting the crashed bike.

 

Actually you WERE getting some assistance. Since no one here knows you, the obvious causes have to be ruled out first. Rather than get your panties in a knot because someone that doesn't know you speculates on your experience, you could just acknowledge the fact that you are an experienced rider and leave it at that.

Also, in a very short search of this problem on the internet, it becomes obvious that most sudden acceleration problems are driver error. That may not be correct in your case, but there is a reason people STARTED with that.

 

Lot's of unnecessary harsh comments here.

Many computer controlled Harleys, slowing down with their throttles closed, will experience a surge in speed, lasting just a second or so. This has been well reported by various writers in magazines over the years.
Our Ultra did exactly that during it's first 5,000 miles. After doing the stage one download, it happens very seldom, but still happens. I would describe it as "loading up" on gas and suddenly accelerating. While having my bike in for service, I was given the opportunity to test drive a new Street Glide (an '08). Slowing down on an exit ramp, it suddenly accelerated almost to the point that I lost control and hit the far curb on the exit ramp. Yes, it happens, and it's not fun when it does so unexpectedly.

 

Well this tells the situation, but does not give enough technical data to make an informed opinion of what could have mechanically gone wrong. Apparently you feel it is in the fuel delivery actuation. Any technician would need to know more in order to further assists you.

Sorry to hear of these types of accidents, I for one hope you are healing well considering the extent of bodily injury you stated that you sustained in the other post.

 

This problem has been discussed before on this forum. Note post 12 and 19 on this thread:

https://www.hdforums.com/forum/softa...l-for-efi.html

They describe what I've experienced.

 

Sudden acceleration is,,,, Usually tied directly to the right hand.....

 

Throttle cable sticking due to low mileage bike sitting...lube throttle cable with teflon lubricant. If it is an EFI bike and has 8 degree fuel injectors that might be a cause of surging.

 

Would a stuck throttle cable cause acceleration?

 

+1. I'm thinking possible throttle cable issue from under lubrication/use.