Hotrodding the GS

Discussion in 'GS Boxers' started by Poolside, Nov 18, 2010.

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  1. slowoldguy

    slowoldguy Tire Tester

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    Now you are stealing my business plan. Selling dimes for a nickel. I've made a small fortune that way. Out of a large one. :D
  2. johnjen

    johnjen I've Been Resigned

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    So the real question is are they gunna be stock brackets or custom ones?

    JJ :rofl
  3. Geoffster

    Geoffster Fool - Born This Way

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    About a month ago I came close to selling my GSA and XCountry and buying an F800GS. (One bike can be better than two if it really fits.) The deal came to a screeching halt when I rode an 800 down a forest trail -- the bike has a WICKED on/off throttle transition that's well documented on this site. And all the work-arounds are uninspiring.

    Yesterday, I rode Angeles Crest with a friend, he on a WeeStrom and me on my IICE Air-less GSA (grin), and I again wondered about the 800, so mid-sized and attractive.

    Would installing an IICE Air on an 800 smooth out that transition?
  4. sonic578

    sonic578 Been here awhile

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    The ADV chatter here points to the G2 cam solution. It looked promising. Not so? I've been doin' some pining after the 800GS as well, and was kinda counting on this.
  5. Poolside

    Poolside Syndicated

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    <table border="0" cellpadding="5" width="650"><tr><td>Yes this thing is just super tedious is all. And many of the little steps required trial and error, and/or testing, and ended up scrap. It had to be this way, the smallest available enclosure, part waterproof, and adjustable, and etc., etc.

    Now that I have it all worked out, I sort of don't want to stop selling them. Time in and all, you know? But I also do want to get on with the next products. What's the latest name from marketing? IICE-D Coffee?

    The first of the next products, presently known as the IICE Cool (unless I get a memo to the contrary :D ), is all electronic and will be much easier to build.

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  6. Geoffster

    Geoffster Fool - Born This Way

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    I consider it to be a crude -- and difficult (because of heated grips) -- sort of work-around.

    Allowing me to more carefully modulate the bike's throttle plates doesn't address the unfriendly programming of the ECU. Nor does changing to a smaller countershaft sprocket to get the RPMs out of the most critical zone.

    IMHO the F800GS needs serious ECU help, whether from the factory or via a POOLSIDE PRODUCT.
  7. Poolside

    Poolside Syndicated

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    <table border="0" cellpadding="5" width="650"><tr><td>Well, my immediate answer would have to be, "Of course it smooths out the transition!" (In my best infomercial tone.) Yea I know, "What the heck are you trying to pull, Jim?"

    I realize that may sound kind of silly. Especially since I've never ridden an F800. But I have have many technical reasons that inform me to answer yes to the question. Many, technical, reasons. So many you wouldn't want to read them all. :D

    All right. I'll relent. Here's one technical thing about what causes the jerkiness. When the throttle is first opened, ideally the ECU should add some good amount of extra fuel. Momentary extra fuel over and above the amount needed for proper mixture. Without enough of that momentary extra fuel, when the throttle is first opened the motor makes momentarily less power. Then, when the throttle is opened a few more degrees, bam! the power comes on normally.

    But you still want to know how it works, and here's a practical idea. There is something better than all the tech talk. Ask the people who bought one of the competitive products how well they work on their F800. You know, the Boosterplug, Accelerator, etc. Maybe do a search and read their reviews in the Parallel Universe forum.


    Regarding the throttle workaround. I like that elliptical throttle bellcrank example. Those reduced-slope bellcranks work well. Again, I haven't tried that particular item on an F800, but on other bikes. It makes a big difference on a KTM Adventure, and on a couple of liter race-rep bikes.

    I understand you'd rather not lose the right side heated grip, and there might be a way to save it. The elliptical cable bellcrank can be placed at the throttle body end of the cable instead of at the twist grip.

    And a interesting tech note about drive-by-wire throttles. The electronic throttle servos open the throttle butterflies with the same reduced-slope profile as the mechanical versions.

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  8. frogy

    frogy Been here awhile

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    Wait a minute,stop waisting the spare parts.Im hoping for some overruns so I can still buy one.:cry
  9. Geoffster

    Geoffster Fool - Born This Way

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    Jim,

    Thanks for your input! After cruising through postings on how competitors' products address the F800GS's on/off throttle issue, I will now pursue what many would consider a downgrade: GSA to F800GS.

    Thanks for all you do for our community!

    - g
  10. JRWooden

    JRWooden Long timer

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    Somewhere on one of the ADVRider threads there are some photos of a guy that did this (made the modification @ the throttle-body end).

    In random commentary, I SWEAR the off-idle harshness mellows with time/age/miles....
  11. David_Moen

    David_Moen Long timer

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    :clapI know that a G2 throttle cam made my dirt bike rideable. Mellowed out the mid throttle hit a ton but WFO is still available when required. My budget for replacement plastic is drastically reduced since installing it!
  12. johnjen

    johnjen I've Been Resigned

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    Uh, you do realize what thread you've just posted in don't you?

    And while it will help solve the problem it really is only a work around. If the fuel injection mapping were correct to begin with then these sorts of mechanical work around's wouldn't be necessary.

    edit: oh yeah they aren't resistors they're called thermistors, very different critter.

    JJ
  13. Poolside

    Poolside Syndicated

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    <BR>:lol3 Dang JJ, I was just going to put a post up with essentially the same comments. But I was getting a bite to eat.

    <BR>
  14. McNeal

    McNeal Long timer

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    You're eating? I figured your Marketing Department would be running roughshod over you like a sweatshop foreman so that you could finish the first product and start working on the second. I know how Marketing Departments like to drink Mojitos on the beach while others work. :D
  15. johnjen

    johnjen I've Been Resigned

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    The marketing dept approves this message. Especially the "Mojitos on the beach while others work" part…

    JJ :evil
  16. Poolside

    Poolside Syndicated

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    Hey Marketing! &#8195;:ksteve&#8195;&#8195;&#8195;:jkam


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  17. Big Spag

    Big Spag ONESPEED

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    When will these devils ship?
  18. Poolside

    Poolside Syndicated

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    <BR>The first IICE Air spotted in the wild!

    [​IMG]

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    [​IMG]

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  19. dsrydr

    dsrydr Been here awhile

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  20. Boxerwrench

    Boxerwrench Been here awhile

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    The one that really counts I haven't seen yet.
    Mine!:p
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