mind of it's own - Honda CRF1000L Africa Twin Forum
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post #1 of 12 (permalink) Old 03-30-2017, 09:58 AM Thread Starter
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mind of it's own

Mobile Alabama US of A
02/27/2017
While riding my Africa Twin dct home from work
i stopped behind a pickup truck that was stopped at a traffic light.
I raised my right hand off the throttle to lift my visor
and my Africa twin took off, hard enough to chirp the rear tire,
and promptly slammed me into the rear of the pickup truck in front of me.

Local dealer replaced broken plastic but could not reproduce the error
that caused the accident.
ISSUE NOT RESOLVED
Customer Service denied knowledge of anything like this happening in the 'USA MARKET'
and were not concerned with reports of incidents in other 'MARKETS' SUCH AS THE UK .
I got my AT back yesterday. ISSUE NOT RESOLVED.
The incident happened so fast there was no time to be scared. Now I will be scared every time I ride it.
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post #2 of 12 (permalink) Old 03-30-2017, 10:36 AM
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The AT DCT has a fully mechanical throttle (cable) control, how can this possibly happen ? Is there a back-up servo unit in the throttle body ?

Last edited by MikeCK; 03-30-2017 at 10:38 AM.
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post #3 of 12 (permalink) Old 03-30-2017, 01:42 PM Thread Starter
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the butterfly valve is operated electronically
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post #4 of 12 (permalink) Old 03-30-2017, 02:38 PM
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Yikes!! That is pretty scary! I don't really have anything to add to your situation except that is sucks and I am unsure what could have caused it.

I just wanted to say hello from a fellow Mobile, AL Africa Twin rider. I have the manual gearbox though.
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post #5 of 12 (permalink) Old 03-30-2017, 02:42 PM
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Quote:
Originally Posted by mdominguez51 View Post
the butterfly valve is operated electronically
The throttle cable is connected to the throttle shaft that turns the butterfly in the throttle body, there is a throttle position sensor but no servo that turns it electronically.
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post #6 of 12 (permalink) Old 03-30-2017, 03:11 PM
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My 2017 AT DCT has a fully manual cable operated throttle body, the cable comes directly from the twist grip to the shaft that hold the butterfly. My question is, how can this bike rev up on its own ?
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post #7 of 12 (permalink) Old 03-30-2017, 04:04 PM
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Quote:
Originally Posted by mdominguez51 View Post
the butterfly valve is operated electronically
Definitely not. It is manual.
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post #8 of 12 (permalink) Old 03-31-2017, 10:29 AM
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Did the bike rev up or did the transmission just kick in chirping the tire? If the thing is manual, there really isn't a way for it to rev up unless you had multiple failures. Something like M/A sensor failed (when I ran a shop we had a car that revved up because of this, think it was a civic or fucus) and then fuel injection, along with the transmission engaging.

Have you seen this?

https://www.africatwinforum.com/forum...witchgear.html

Texas Honda Africa Twin FB page
https://www.facebook.com/groups/408075406212122/

Combat Engineers Lead The Way!

2016 CRF 1000L
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post #9 of 12 (permalink) Old 03-31-2017, 01:14 PM
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I don't mean to be rude and no offence to anyone, but owning an AT DCT I felt compelled to find out if my life was at risk ridding this bike and did an in depth investigation into the matter and my findings are as follows:

The only way that it is physical possible for an AT DCT to take off on its own,especially chirping a tyre, is by rider input.

https://www.lingshondaparts.com/hond...p&block_05=hmc

The accelerator cable is connected directly to the throttle butterflies (no electronics involved) and it is impossible for the engine to burst into full power with those butterflies close.It is physical impossible. Again the only way those butterflies are going to go wide open is by rider input. Also how do you "chirp" a rear tyre on a AT ?

For those mechanical minded, please see video attached, it shows unequivocally that the throttle body is exclusively manually operated. You can also see a TPS sensor, the injector rail together with the injectors and the idle stabilizer.
DCT riders, please continue enjoying your great machines, you are safe.

Last edited by MikeCK; 03-31-2017 at 01:34 PM.
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post #10 of 12 (permalink) Old 04-01-2017, 12:07 AM
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I have a suspicion running through my mind that it's rider error, but a subconscious error.

I rode the DCT demo bike of my dealers and everything was fine. I was marvelling at how much better this new version of DCT was over the one fitted to the 1200 Crosstourer that I had the pleasure of putting 500 miles on the year before.

I came up behind a car at traffic lights, thankfully leaving a reasonable gap. The bike was still in Drive, ticking over nicely with no creep like auto cars I've driven. And then it happened.....I lurched forward unexpectedly. Years of riding manual motorcycles hadn't taught me, don't blip the throttle on a bike with a auto 'box while you're stationary in traffic without selecting neutral first !!!

I nearly had myself convinced it wasn't anything I'd done, but in all honesty, I soon realised it had been my fault. I'd just done what I've naturally been doing without a thought for years...I blipped the throttle.

Now I'm guessing that the two or three people that this has happened too in the world will swear on their mothers lives that their hands were off the throttle when their incidents happened, but.............
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