F800GS Snatchy Throttle Fixed!

Discussion in 'Parallel Universe' started by jessehere, Jun 5, 2009.

  1. Mach Z

    Mach Z Budding ADV Addict!

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    The problem is not so much the hole to pass the wires through but that the stock tube assembly has a channel built in for the wire allowance within the cam. This extra wire is required to allow the grip full rotation to W.O.T. There is no room for that with the G2 set-up.
    I have no regrets installing the G2. It definitely smoothed out the off-idle transition. I used to get hand cramps within 30 minutes with the stock grips. I have not had one since doing this mod with the larger more ergo grips.
  2. Pomo

    Pomo gonzo

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    Yeah, I'm just wondering if it would be possible to drill or dremel out a hole or similar channel on the G2 for a cleaner/closer to stock look. The area where the channel sits is behind the throttle cable track anyway so there shouldn't be any conflict there, right?
  3. Gangplank

    Gangplank Advenchaintourer

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    Seems like the hard way round to fix an easy problem.

    I got the HTC Power Controller, put on thicker grips by using Renthal dirt bike grips and slid them over the puny BMW grips and that fixed it good. With a 15/41 sprocket the snatch was gone.
  4. Mach Z

    Mach Z Budding ADV Addict!

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    Heat shrink does a clean job...

    [​IMG]

    [​IMG]
  5. Beezzz

    Beezzz Get out and ride

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    I ordered the High Tech Coon Ass throttle "Power Controller" on Friday and it was shipped on Saturday, the next day. The "power controller" smoothed out the coarse running engine off idle. The change was subtle, so I took it on and off a few times and ran a slight up hill grade dirt trail with tight turns to test it out. I ran the course at idle and slowly accelerated in the tight up hill turns. Before the addition, the engine would want to "die" or "run roughly" when coming off of idle at slow speeds, under load (a slight up hill grade). To compensate, I would run the bike faster to keep it from stalling. In the tight dirt trails, my stock bike was unsafe. I wasn't controlling the bike, the bike was controlling me. The new addition made the bike safer in slow maneuvers at low idle speeds. In a perfect world, I would still prefer less power off idle for dirt trail work. More user friendly, like my KTM 450 EXC.

    Summary: As Bayner said in Feb 2012 of a sensor device: "It makes the bike much easier to ride and less likely to stall at lower revs. It does not change the idle speed. It does not effect the temperature reading on the dash."
  6. itsatdm

    itsatdm Long timer

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    I have made a number of changes over the years trying to control the abrupt throttle at low rpm. I have the throttle tamer, an Accelerator module and larger grips with grip cozies. They all incrementally made improvements.

    Recently I added to all the others an AF-XiED oxygen sensor spoofer set at 14.2 AFR. I can't say it alone solved the problem, but its a very smooth bike that pulls from low rpm that is easily controlled. On most terrain, I can pull one gear taller than before.
  7. Beezzz

    Beezzz Get out and ride

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    That is perfect. Congratulations. Good job. HOW MUCH DOES BMW OWE YOU FOR FIXING THEIR PROBLEM?

    More details: I asked the service tech at San Diego BMW Kearny Mesa if there was "mapping" I could use to lower the HP off idle. They said "no". "No one has ever asked that before." It was a hard answer to accept considering all the performance options we have that come standard on autos and some bikes. Just a wire to disengage for "economy", "performance", "sport" to change the timing or fuel delivery would be helpful. In the old days, we could change a fuel jet. Good job hanging in there with your f800 to fix the problem. I hope you have some hair left and it is not torn out of your head and laying on the floor.

    In July 2012 "Itsatdm" said:

    "The fuel modules do richen up the throttle. In fact, I can actually lug the engine. If you can do that, it will give you the ability to load the engine at crawling speed without fear of it dying and won't immediately go into light switch mode. Good enough that the 15 tooth sprocket went back into the box. On typical fire roads I can actually use a 17 tooth for most roads as long as they are not steep switch backs. The stock 16 tooth is good enough for a wide range of terrain."

    True enough.

    I am not sure your second wish of 2012 came true. "I think improvement enough, that if I bought another F800gs, all those mods are coming off and onto the new bike."

    (My bike is an f800gs 2013.)

    Keep the faith!
  8. itsatdm

    itsatdm Long timer

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    Here is another long winded dialogue on my thoughts on this. The best solution is suspension upgrades.

    My first major ride on my new bike was Saline/Death Valley. I did some of the typical roads, like Jail Canyon, Hunter Mountain, Lippincott, etc. Lots of rocky terrain and I felt every impact through the bars and fed it into the throttle. It does not take much throttle input to rocket you into the next set of rocks.

    The first mod was the throttle tamer. At least little twists of the throttle had less effect on the amount of fuel going to the engine.

    The next was suspension. I have had a laundry of suspension mods. What I am currently running is not the best, but at least the impacts through the bars is lessoned and I am less likely to inadvertently twist the throttle due shocks past up through the handlebars.

    Then came the temp spoofer. It seemed to work. I believed everything I wrote in 2012. I am beginning to have some doubts.

    Roger 04RT has posted a lot of data, much of it confusing to me. A lot of the research was done on other models of BMW.

    I am still not sure how much adapting takes place, but I am becoming convinced that it takes more throttle to get the bike into open loop than I thought. If true, then the benefits of a temp spoofer will occur at higher rpms than I believed.

    As far as the 16 vs 17 sprocket. You rarely hear a complaint from F658 gs owner about an abrupt throttle. Could be the mapping, where they ride or they are lugging the engine more and that requires more throttle. If the latter then they and me were spending more time in open loop. In any event not something I would recommend for harder terrain, but perfectly satisfactory for pavement and easier dirt.

    The initial effects of the AF-Xied are immediate. Over time, the engine gets smoother and the rpm range where it is felt broadens. In other words it is working when the bike is in open loop. So some adapting is obviously taking place.

    I covered all my bets and kept the temp spoofer while adding the AF-XiED. Whether it is one or the other or combination of both, I love it.
  9. sorebutt

    sorebutt Long timer

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    [QUOTE=itsatdm;23636972My first major ride on my new bike was Saline/Death Valley. I did some of the typical roads, like Jail Canyon, Hunter Mountain, Lippincott, etc. Lots of rocky terrain and I felt every impact through the bars and fed it into the throttle. It does not take much throttle input to rocket you into the next set of rocks.


    I've experienced the same thing. I've gone up steep rocky hills standing on the pegs and the engine rpm keeps changing as the throttle twist with the bike motion. A throttle tamer helped. One problem I see is there is so little tension on the throttle that it doesn't take much to twist it. I've had problems with the web of my glove between the tumb and finger will twist the throttle when reaching for the brake. A stiffer throttle spring would help.
  10. Beezzz

    Beezzz Get out and ride

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    I bought my second High Tech Coon Ass Throttle Controller. This one is for my wife's 2013 F700GS. It smoothed out the engine roughness at idle under load. Engine sounds better and runs smoother. A subtle difference, however, it does make the bike safer from stalling at slow speeds. I feel there was more of a problem with my 2013 F800GS that needed solving than my wife's bike issue.
  11. SubAtomicGenius

    SubAtomicGenius Sarcastic Fantastic

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    Hopefully my factory 800GS build begins soon this month (!) - I've already purchased the G2 throttle tamer, an accelerator module, and I intend on getting a 15-tooth sprocket when the bike is delivered in July. I've read a lot about the different "snatchy throttle" strategies/technologies and I even intend on experimenting myself a bit with the IAT and NTC thermistors.
  12. pklop

    pklop Motorcycle addict

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    Do you guys know the difference between the "g2 street tamer" and the "g2 dirt tamer" they sell?
  13. pklop

    pklop Motorcycle addict

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    Fast service from G2 Ergonomics. I did send them an email asking this same question. I got a fast response telling me that the difference is in the length of the throttle tube. "The street tamer is typically a longer throttle tube" was the response.
  14. adventureAF

    adventureAF Nate

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    I just added a set of foam/neoprene grips over my factory f8gsa grips and let me tell you I immediately noticed an improvement on the snatchy throttle. I know some of the problem lies in the fueling but I also think some of it lies in the very narrow grip size. By simply increasing the diameter of the grips you lose some of the abruptness (is that even a word?) in the throttle. This may not cure it to the extent you want but for $20 or less it's a definite improvement over stock and also makes the grips much more comfortable.

    Sent from my SM-G900V using Tapatalk
  15. JustBob

    JustBob Uh...who me?

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    I finally got around to doing this and it works great! It's a new bike.
    The heated grip wiring procedure could be better, but I'll ride it like this and see if it lasts.....the connection I mean.
  16. dpike

    dpike Been here awhile

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    I currently have an afxied installed and didn't find that helped much at all. Maybe I'll switch to the g2 and a booster plug combination. What grips did you use Bob?
  17. JustBob

    JustBob Uh...who me?

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    G2 and booster plug is exactly what I have. I used the grip as shown on the first page of this thread....a K-bike grip I think it is. It went easily over the G2/heating element using brake cleaner spray as a lube. I was concerned about tearing the heating element when forcing the grip on. I don't mind having different grips because I cover them both with Gripbuddies so they feel and look the same. This snatchy throttle thing was always a pain when riding this bike. Now fixed. :clap
    dpike likes this.
  18. dpike

    dpike Been here awhile

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    Awesome. Thank you.
    Can the new grip be used on the left bar as well to balance them? I used foam and grip buddies and wasn't that happy with the feel from either of them.
  19. JustBob

    JustBob Uh...who me?

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    I don't know about the left bar as I didn't measure it. Maybe others can answer that question.
  20. itsatdm

    itsatdm Long timer

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    The K bike grips are sold individually. For some reasons the F800gs grips were not.