10-01-2015, 03:38 AM | #31 |
Join Date: Jan 2008
Posts: 221
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10-01-2015, 10:12 AM | #32 |
Join Date: Jan 2008
Posts: 221
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If the spark plug electrode is wet or black, as compared to beige-brown, excessive fuel may be bypassing the carb via a deficient vacuum petcock diaphragm.
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10-01-2015, 10:34 AM | #33 |
Join Date: Aug 2015
Posts: 16
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The spark plug seemed to be fine when I took it out, a little darker than it probably should be but the carb is definitely running a bit rich.
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10-01-2015, 11:49 AM | #34 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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Adjust the valves, and then evaluate.
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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10-21-2015, 04:15 PM | #35 |
Join Date: Aug 2015
Posts: 16
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So I know this is really late but I basically decided to rebuild the whole engine while I was dealing with this just to make sure it wasn't compression since I was planning on doing a big bore kit (47mm bore and head) anyways with A9 performance camshaft. I also replaced the final drive gears to a 49/17 ratio on top of putting in a new performance clutch and variator. I also replaced the the CDI and ignition coil with their performance models (the blue racing CDI and orange ignition coil.) I set the valves to .003 intake and .004 exhaust but the scooter still didn't work. After checking spark I was at a loss as I hadn't considered it to be a fuel problem but lo and behold the issue was the petcock going bad. Once that was figured out I replaced it with a new manual petcock that had less chance of failure (and was also easier to see fuel flow) and the scooter started running again. Now with all these mods I just need to get the carb and variator tuned properly and I should be seeing some decent speeds after. On a flat I was only getting 43 top speed but the acceleration is pretty solid. The scooter doesn't seem to quite be getting into its ideal RPM range but I won't be able to tune it properly until I'm able to get my new tach/speedometer installed which will be saved for another weekend project.
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10-22-2015, 10:56 AM | #36 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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At least it's running. That's a good start.
__________________
Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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