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General Minitrail Talk
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S65 carb woes
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<blockquote data-quote="Sams65" data-source="post: 188655" data-attributes="member: 12820"><p>Thanks for the continued input everyone - some clarification below;</p><p></p><p>Unfortunately the over-rich condition appears as soon as the bike is fired up. It accelerates up to a certain point and then just falls flat on its face, refusing to pick up any more speed. I'm guessing due to getting loaded up with fuel like you said. But yeah, the bike starts up easily (a little too easily, without choke) and idles super rich.</p><p></p><p>I did check the dynamic timing a couple of times when I was switching out points/condensers etc and the F mark appears at idle. There are 2 additional notches on the flywheel after F that appear when revs are increased, for timing advance. (Why there are 2 notches, I have no idea) This makes me think the timing advance mechanism and springs are ok. I did force them open with my fingers, when I had the flywheel off and they snapped back as they should.</p><p></p><p>I currently have the head off the bike and was hoping to lap the valves before I put it back together. (My compression numbers are still bugging me) Once everything is back together I'll do another test with the timing light and REALLY pay attention to the markings this time.</p><p></p><p>Just to throw another variable in there - What do you guys think about <strong>issues within the exhaust system? </strong>That's one of the only component on the bike that has stayed untouched through this whole ordeal, other than getting a cleaning. I don't have enough know-how when it comes to the intricacies of exhaust science/back pressure etc but I know there used to be a mouse (or some other animals) nest that I cleared out when it was put back together. it's a fairly simple, single piece unit so it's hard to 'get inside' it. I have run it with and without the baffle which is removable, but it made no difference. Just another thought.</p></blockquote><p></p>
[QUOTE="Sams65, post: 188655, member: 12820"] Thanks for the continued input everyone - some clarification below; Unfortunately the over-rich condition appears as soon as the bike is fired up. It accelerates up to a certain point and then just falls flat on its face, refusing to pick up any more speed. I'm guessing due to getting loaded up with fuel like you said. But yeah, the bike starts up easily (a little too easily, without choke) and idles super rich. I did check the dynamic timing a couple of times when I was switching out points/condensers etc and the F mark appears at idle. There are 2 additional notches on the flywheel after F that appear when revs are increased, for timing advance. (Why there are 2 notches, I have no idea) This makes me think the timing advance mechanism and springs are ok. I did force them open with my fingers, when I had the flywheel off and they snapped back as they should. I currently have the head off the bike and was hoping to lap the valves before I put it back together. (My compression numbers are still bugging me) Once everything is back together I'll do another test with the timing light and REALLY pay attention to the markings this time. Just to throw another variable in there - What do you guys think about [B]issues within the exhaust system? [/B]That's one of the only component on the bike that has stayed untouched through this whole ordeal, other than getting a cleaning. I don't have enough know-how when it comes to the intricacies of exhaust science/back pressure etc but I know there used to be a mouse (or some other animals) nest that I cleared out when it was put back together. it's a fairly simple, single piece unit so it's hard to 'get inside' it. I have run it with and without the baffle which is removable, but it made no difference. Just another thought. [/QUOTE]
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