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FJR Motorcycle Forums
Technical & Mechanical Problems
Lumpy Idle
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<blockquote data-quote="RossKean" data-source="post: 1397819" data-attributes="member: 19880"><p>From what I have seen on the 2011 vs the 2007, the cold start increased engine speed is greater - close to 1500 RPM vs a base of 1000. Makes sense when you consider that the AE was no longer sold in North America. (But that difference may be related to whatever is going on here.) I guess I was mixed up on the function of the wax motor function - makes sense.</p><p></p><p>I agree that it will be interesting to see if the cylinders are balanced. I will also be interested to see where the starting point was on the TBS - I'll probably start them all at 3/4 turns out. Yes, I know about the idle screw on a Gen II. I also know that you lose the range of idle adjustment if the TBS is messed up or if you have the wrong starting point - i.e. reference screw backed out too far. Doesn't Gen I essentially adjust the throttle stop position instead?</p><p></p><p>But I will check the O2 sensor and look for vacuum leaks first.</p><p></p><p>I'm not terribly concerned with it - I suspect it is something simple. Others have said that they also have a "lumpy" idle but I wonder how they compare to what I am getting?</p></blockquote><p></p>
[QUOTE="RossKean, post: 1397819, member: 19880"] From what I have seen on the 2011 vs the 2007, the cold start increased engine speed is greater - close to 1500 RPM vs a base of 1000. Makes sense when you consider that the AE was no longer sold in North America. (But that difference may be related to whatever is going on here.) I guess I was mixed up on the function of the wax motor function - makes sense. I agree that it will be interesting to see if the cylinders are balanced. I will also be interested to see where the starting point was on the TBS - I'll probably start them all at 3/4 turns out. Yes, I know about the idle screw on a Gen II. I also know that you lose the range of idle adjustment if the TBS is messed up or if you have the wrong starting point - i.e. reference screw backed out too far. Doesn't Gen I essentially adjust the throttle stop position instead? But I will check the O2 sensor and look for vacuum leaks first. I'm not terribly concerned with it - I suspect it is something simple. Others have said that they also have a "lumpy" idle but I wonder how they compare to what I am getting? [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Lumpy Idle
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