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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Air Fuel Gauge 02 Sensor Lambda Sensor
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<blockquote data-quote="Magnetoman" data-source="post: 107426" data-attributes="member: 2806"><p>By accident I discovered an undocumented "feature" of my Innovate LM-1. On the last run a week ago the display had gone blank for a few seconds but it continued recording. I checked the battery and it still had 30% capacity but I replaced it anyway with one that tested 100%. Along with that undocumented feature of display blanking with a low battery, today a 16-segment bar graph appeared across the bottom of the screen which is a documented, but forgotten-by-me, feature. Apparently, it needs full battery power to be activated.</p><p></p><p>The bar graph provides an analog display of the mixture, with the middle at stoichometric λ=1 (AFR=14.7 for gasoline). Although λ is a "better" way of expressing mixture strength, especially for mixed fuels, I prefer to think in terms of AFR. In this case the display goes from lean >19.4 at the left to rich <10 at the right, so the desired ~12-13 for maximum power will have ~3/4 of the bars displayed. This means the 0-2 V gauge I added is superfluous.</p><p></p><p>After the work I had done to it, today the bike was a bit rich at full throttle, but otherwise behaved way better than previously. Actually, other than at full throttle, if not for the damn AFR gauge I might think the jetting was nearly perfect.</p><p></p><p>It ran well as I left the neighborhood with no hesitation on acceleration so the present #3.33 cutaway seems good. The first graph shows the AFR was ~13 (purple curve) at a little over 1/8 throttle (the red curve is the throttle opening, with full throttle 1.5 V).</p><p></p><p>The second graph shows that at ~1/3 throttle the AFR was ~14.5 so perhaps the needle could stand to be raised one notch (it's currently on the top notch). However, I won't alter it until I get the main jet worked out.</p><p></p><p>Once I reached the larger road there's a ~1/4-mile uphill stretch where if I time the traffic right I can give a bike full throttle for a few seconds for a crude check of the main jet. The bike stumbled from a too-rich mixture and as the third graph shows during that interval where I held full throttle for 3.5 sec. the AFR dropped to a very rich 9.2.</p><p></p><p>The bike idles well, but so far I've been too chicken to rely on that so I blip the throttle regularly when at the one stoplight on my jetting route. Also, I've become so reliant on the DocZ that I'm not sure I would even remember how to kick start it should it die at that light.</p><p></p><p>[ATTACH]27180[/ATTACH][ATTACH]27181[/ATTACH][ATTACH]27182[/ATTACH]</p></blockquote><p></p>
[QUOTE="Magnetoman, post: 107426, member: 2806"] By accident I discovered an undocumented "feature" of my Innovate LM-1. On the last run a week ago the display had gone blank for a few seconds but it continued recording. I checked the battery and it still had 30% capacity but I replaced it anyway with one that tested 100%. Along with that undocumented feature of display blanking with a low battery, today a 16-segment bar graph appeared across the bottom of the screen which is a documented, but forgotten-by-me, feature. Apparently, it needs full battery power to be activated. The bar graph provides an analog display of the mixture, with the middle at stoichometric λ=1 (AFR=14.7 for gasoline). Although λ is a "better" way of expressing mixture strength, especially for mixed fuels, I prefer to think in terms of AFR. In this case the display goes from lean >19.4 at the left to rich <10 at the right, so the desired ~12-13 for maximum power will have ~3/4 of the bars displayed. This means the 0-2 V gauge I added is superfluous. After the work I had done to it, today the bike was a bit rich at full throttle, but otherwise behaved way better than previously. Actually, other than at full throttle, if not for the damn AFR gauge I might think the jetting was nearly perfect. It ran well as I left the neighborhood with no hesitation on acceleration so the present #3.33 cutaway seems good. The first graph shows the AFR was ~13 (purple curve) at a little over 1/8 throttle (the red curve is the throttle opening, with full throttle 1.5 V). The second graph shows that at ~1/3 throttle the AFR was ~14.5 so perhaps the needle could stand to be raised one notch (it's currently on the top notch). However, I won't alter it until I get the main jet worked out. Once I reached the larger road there's a ~1/4-mile uphill stretch where if I time the traffic right I can give a bike full throttle for a few seconds for a crude check of the main jet. The bike stumbled from a too-rich mixture and as the third graph shows during that interval where I held full throttle for 3.5 sec. the AFR dropped to a very rich 9.2. The bike idles well, but so far I've been too chicken to rely on that so I blip the throttle regularly when at the one stoplight on my jetting route. Also, I've become so reliant on the DocZ that I'm not sure I would even remember how to kick start it should it die at that light. [ATTACH]27180[/ATTACH][ATTACH]27181[/ATTACH][ATTACH]27182[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Air Fuel Gauge 02 Sensor Lambda Sensor
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