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FJR Motorcycle Forums
Technical & Mechanical Problems
Synchronization of throttle bodys on 2013 FJR
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<blockquote data-quote="Fred W" data-source="post: 1227856" data-attributes="member: 3828"><p>I'm going to post my experience here rather than starting yet another 3rd Gen TBS thread. I just hit 5k miles and performed my second service (First was at ~ 600 mi). Essentially this was just an oil change and a few added checks, took only a little over an hour and a half all told.</p><p></p><p>Part of that service was doing a TBS. Many others have reported that the only adjustments we have are the air bypass screws at idle, as the factory has eliminated the linkage adjusters between throttle body butterflies.</p><p></p><p>One piece of info that I was able to collect supports my theory that the reference screw (painted with the white dot) is fully closed from the factory. Before I even started, I broke the paint free and found that the screw was previously fully closed and lightly seated So I think my theory (posed earlier above) is correct, that the factory just closes all 4 air screws and then just paints the one that has the lowest vacuum of the four while in that condition, and then opens the other three screws to match the new "reference". That would explain why it is usually #1 (mine is) but not always.</p><p></p><p>FWIW I had no trouble getting the screwdriver on the screws to adjust them. Not sure what the big hubbub is all about there. Just reach under the tank and poke the small screwdriver (tweaker) through the hoses and cables along the fuel rail. In my case the adjustments were not off very far. I seriously doubt that I will be able to feel any difference from having done this adjustment. Since this is the only adjustment that we have, and it will primarily affect the balance at idle with quickly diminishing benefit at higher rpms, I think this is going to be a maintenance that can be done once and then ignored for a very long time.</p></blockquote><p></p>
[QUOTE="Fred W, post: 1227856, member: 3828"] I'm going to post my experience here rather than starting yet another 3rd Gen TBS thread. I just hit 5k miles and performed my second service (First was at ~ 600 mi). Essentially this was just an oil change and a few added checks, took only a little over an hour and a half all told. Part of that service was doing a TBS. Many others have reported that the only adjustments we have are the air bypass screws at idle, as the factory has eliminated the linkage adjusters between throttle body butterflies. One piece of info that I was able to collect supports my theory that the reference screw (painted with the white dot) is fully closed from the factory. Before I even started, I broke the paint free and found that the screw was previously fully closed and lightly seated So I think my theory (posed earlier above) is correct, that the factory just closes all 4 air screws and then just paints the one that has the lowest vacuum of the four while in that condition, and then opens the other three screws to match the new "reference". That would explain why it is usually #1 (mine is) but not always. FWIW I had no trouble getting the screwdriver on the screws to adjust them. Not sure what the big hubbub is all about there. Just reach under the tank and poke the small screwdriver (tweaker) through the hoses and cables along the fuel rail. In my case the adjustments were not off very far. I seriously doubt that I will be able to feel any difference from having done this adjustment. Since this is the only adjustment that we have, and it will primarily affect the balance at idle with quickly diminishing benefit at higher rpms, I think this is going to be a maintenance that can be done once and then ignored for a very long time. [/QUOTE]
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Technical & Mechanical Problems
Synchronization of throttle bodys on 2013 FJR
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