16 Africa Twin Manual - 1st Gear Throttle Snatch Off Road

Discussion in 'Japanese polycylindered adventure bikes' started by Lost Cartographer, Jul 24, 2018.

  1. Lost Cartographer

    Lost Cartographer Been here awhile Super Supporter

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    Having difficulty with low speed off road drivability: throttle-off is abrupt, and throttle-on is even worse.

    No problem on pavement, or in 2nd gear off road, but when bouncing around off road in 1st gear it is really difficult to be smooth.

    Going to a 15 tooth front sprocket made things a lot worse, but no way am I going back to 16t.

    I have already re-contoured the throttle cam, that helped a little bit but the real problem is fueling- it is quick to go to fuel cut, and abrupt when the fuel starts flowing again.

    Do any of the fuel controllers allow you to modify the fuel cut or hang the Idle Air Control Valve open during fuel cut?
    #1
  2. XRman

    XRman Long timer

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    Have you dialled the TC to off when on dirt. If not, try it and see if it helps.
    #2
  3. oldmanb777

    oldmanb777 Just say NO to socialism! It's a bad drug!

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    You have ot be gentle with it. 94 hp wants to launch out from under you in a hurry. Yes I think its abrupt. I always thought it was the throttle tube ratio. I do prefer the 15t sprocket as well.
    #3
  4. Lost Cartographer

    Lost Cartographer Been here awhile Super Supporter

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    TC off in the dirt. I really wish this thing would retain the previous state (ie TC off and ABS off) on restarts.

    Also chain is adjusted properly, throttle cables aren't too loose or too tight either.

    Changing the throttle tube profile helps, but it only mellows out the throttle once it is already open. It's the "0% to initial opening" area that needs the real improvement imho.
    #4
  5. XRman

    XRman Long timer

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    It seems this is a common issue for most bikes defaulting back to ABS/TC on fully when the bike is turned off. My guess is that it is a supposedly a" safety" feature.

    I recall that the F800 GS owners also complained of the lumpy throttle response down low. The solution was a device that enriched the fuel mixture (AXified?). Perhaps that is the place to start looking for a solution. EFI is a black art to me so I can't help out with how to do it.
    #5
  6. Motomantra

    Motomantra Registered Lurker

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    As described by OP, agree to it being fueling. Seems a common complaint among several brands. Never had that problem (that I couldn't fix) with carbs.
    #6
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  7. Junglejeff1

    Junglejeff1 Long timer

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    I installed the street tamer G2 and it helped.I just purchased a booster plug set up and am thinking it will smooth out more plus a little added boost.When bike is cold it hick ups a little seems to have pre ignition for a minute till it starts to warm up.It is not to bad now but hoping booster makes it perfect.typical EFI problem.
    #7
  8. ABCoast2Coast

    ABCoast2Coast Adventurer

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    Booster plug or rapidbike easy is the most common EFI fix to richen up the fueling. Your clutch finger is the second most common fix. I noticed that on this bike I actually pull in the clutch completely when I'm slowing but not even near a stop on this bike and I don't do that with any other bike. Then I feather it a lot more than other bikes when going over a rocky section or doing a tight switchback where on other bikes I'd just have it in 1st and chug. Just nature of the beast. This is after improving it with a booster plug which made a noticeable difference with mine.
    #8
  9. Junglejeff1

    Junglejeff1 Long timer

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    My chain ate itself (And alot of sand)today so going to change my gearing up with new chain wheels.I felt that the 15 on front was a little low so going to to leave front stock and go up 2 teeth on rear.Stock is to high for the riding I do and thought I was going to burn out clutch a couple times.
    #9
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  10. Cruz

    Cruz Lost but laughing.

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    Would suggest that the Booster Plug should help with this problem as it did on my XChallenge with similar behaviour as you are describing with your AT.
    #10
  11. Lost Cartographer

    Lost Cartographer Been here awhile Super Supporter

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    @Junglejeff1

    Have you installed the booster plug yet?
    #11
  12. Junglejeff1

    Junglejeff1 Long timer

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    Not yet,Been riding alot and have not had the time.While I got all that stuff off going to check valve clearances even thrue I'm not quite due for it yet.
    #12
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  13. HondaRon 72

    HondaRon 72 ktm 450 exc

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    I installed the booster plug and it did help with the throttle on jerkiness.It also helped liven up the mid range too with little gas mileage difference. I went with a 44tooth rear sprocket also.Because this threw my speedo off by about 10% i added a speedohealer.PIA to install.(having a mate to help worked well ). All excellent mods for me. on my 2016 MT.
    Cheers
    Ron.
    #13
  14. mcmann

    mcmann Adventure Rider Junkie Supporter

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    Make sure there is minimun freeplay in the throttle . . .
    #14