townesvanzandt
XS650 New Member
Hey y'all! I have a stock 1975 xs650 that has run perfectly for the past few months. Synced perfectly, low mileage, no rust, beautiful bike. Can ride it all day long with no issues. The other day I rode it for a few hours, let it cool down and gave it its first oil change in a while, and then rode out again. About 20 minutes into the ride the bike just kept cutting out randomly - it would start, ride for about a block and then bog out and die at idle. It started sounding real dirty. Spark plugs looked good when I pulled them, and was getting spark from both cyls. When I checked the battery a few times (thought it was a bad battery at first), it sparked when my tools made contact with the frame while on the screw (the ignition was definitely off).
I let it sit for a few days and then went to go pick it up. I had taken the battery and charged it - battery was testing with the correct voltage both off and while revving (pretty much a brand new AGM battery). Bike was starting but bogging like crazy, sounding super rough, making it about a block or so at a time. Put my hands back at the exhausts and the left side was putting out way less pressure than the right - like way, way less. Spark plugs were then both looking bad - one carbon fouled and one oil. It's now still bogging and dying quickly, also now when I try to give it gas it kinda skips a beat and sometimes dies. Really hard for me to believe that it could have come out of sync somehow.
Does anybody have any idea what's going on here? I immediately thought that the coil fried, going to get to it later this week to test the coil and see what's going on there. It's acting like it's got massively dirty carbs but I'm really confused as to how it could go from running perfectly to like this out of nowhere. Also can't figure out how it would be possible for the oil change to be related but it was the only change that was made to the bike.
Any advice that you have would be great! I'm going to clean carbs and want to switch over to an electronic ignition anyway, but if you have any other advice I'd love to hear it. Thank you!
I let it sit for a few days and then went to go pick it up. I had taken the battery and charged it - battery was testing with the correct voltage both off and while revving (pretty much a brand new AGM battery). Bike was starting but bogging like crazy, sounding super rough, making it about a block or so at a time. Put my hands back at the exhausts and the left side was putting out way less pressure than the right - like way, way less. Spark plugs were then both looking bad - one carbon fouled and one oil. It's now still bogging and dying quickly, also now when I try to give it gas it kinda skips a beat and sometimes dies. Really hard for me to believe that it could have come out of sync somehow.
Does anybody have any idea what's going on here? I immediately thought that the coil fried, going to get to it later this week to test the coil and see what's going on there. It's acting like it's got massively dirty carbs but I'm really confused as to how it could go from running perfectly to like this out of nowhere. Also can't figure out how it would be possible for the oil change to be related but it was the only change that was made to the bike.
Any advice that you have would be great! I'm going to clean carbs and want to switch over to an electronic ignition anyway, but if you have any other advice I'd love to hear it. Thank you!