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Honda Cub (Passport) Forums
General
88cc upgrade
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<blockquote data-quote="whereshaldo" data-source="post: 176984" data-attributes="member: 10940"><p>Ok, I've been tweaking the carb all week, playing with different needle positions and different jets. I finally went and double read the Honda Motorcycle Carbeuretion manual (available in the C70 Yahoo Group Files). With that, I tore back in today and went back to the 98 jet, which is what I had before. The 100 and 102 were too big and its hard to describe the feeling but once you know what over-jetted feels like its pretty obvious when you get it right. So now with needle clip in the middle position, 98 main jet, and air screw turned out 2.25 turns the bike just hauls. Its really a pleasurable ride. One small thing that I also changed which did make a slight but notable difference was the slide valve. I'd put in the Dr ATV heart transplant kit, which has an adjustable needle and a new slide valve. When I had everything apart today I compared the original slide valve to the Dr ATV and the slice out of the slide valve is slightly taller on the Dr. ATV valve than the OEM Honda valve. Putting the OEM valve back in smoothed out the intermediate throttle ever so slightly. </p><p></p><p>Thanks all for the continued advisement. </p><p></p><p>Hal</p></blockquote><p></p>
[QUOTE="whereshaldo, post: 176984, member: 10940"] Ok, I've been tweaking the carb all week, playing with different needle positions and different jets. I finally went and double read the Honda Motorcycle Carbeuretion manual (available in the C70 Yahoo Group Files). With that, I tore back in today and went back to the 98 jet, which is what I had before. The 100 and 102 were too big and its hard to describe the feeling but once you know what over-jetted feels like its pretty obvious when you get it right. So now with needle clip in the middle position, 98 main jet, and air screw turned out 2.25 turns the bike just hauls. Its really a pleasurable ride. One small thing that I also changed which did make a slight but notable difference was the slide valve. I'd put in the Dr ATV heart transplant kit, which has an adjustable needle and a new slide valve. When I had everything apart today I compared the original slide valve to the Dr ATV and the slice out of the slide valve is slightly taller on the Dr. ATV valve than the OEM Honda valve. Putting the OEM valve back in smoothed out the intermediate throttle ever so slightly. Thanks all for the continued advisement. Hal [/QUOTE]
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General
88cc upgrade
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