I just bought a 1990 DR350S 5 days ago with 10k miles on it. It's in great shape and the previous owner seemed very competent with bikes (he had several others and was offloading this one because he replaced it with a newer DR400). The problem is, this is my first motorcycle and I'm still trying to learn all about the engine and everything. He cold started it for me when I saw it and for the first 3 days I had no trouble doing the same. He showed me the trick I've read on here a few times with the whole "petcock set at "on," hold the decompression lever and give it a 5-10 warm up kicks, then full choke, slowly kick it until the lever pops back out, then give it a good kick and it fires up" ...that worked like a charm for my first 3 days and I was able to get out on the road and everything was running great, no hiccups or shifting issues or idle problems at all. Now, yesterday and today, I have been having trouble getting it to fire up. I was able to get it up yesterday twice but it wouldn't idle and eventually stalled out and I couldn't get it again. Same thing once today, eventually stalling out. Now I can't get it at all. I tried a few roll starts and got close twice, but it never went (could be the wet driveway since it's been raining for 2 days straight). I'm not super mechanically inclined, but I have a few resources I can talk to and ask for help, but I want to give them some direction so they aren't starting from scratch. So, I've read (but don't know how to do it) cleaning the carb, spark plugs, throttle adjustments, etc.,(i saw that stuff here http://www.thumpertalk.com/forum/showthread.php?t=964093) but I don't get why it would change over 18 hours and I don't know if one of those are really the issue. My friend did stall the bike once, but it started up after that and then the next day I had trouble. I'm totally lost and really really anxious to get riding again since I'm now fully inspected and registered. Any pointers? Sorry for the long message... Thanks to everyone.