[bike: 2001 XR650L; location: Dallas, TX; elevation: 558 feet] what's up guys, I'm a former (fuel injected) Ducati owner and recently wanted to get back into motorcycling after a short break (a child, a move, etc. etc.) I just acquired a 2001 XR650L last week and I'm having a little trouble with it. The previous owner delivered it to my house, he rode it, I rode it, it ran ok but was "popping" a little when off the throttle. PO explained, "it does that until it warms up, no worries. that's how the carbed Hondas run." I've never owned a carbed motorcycle. I'm dumb. I said, "oh, okay..." I decided to do some basic service, since half the fine service records that were provided don't go with this bike - and a receipt for a rebuild the PO told me about (new crank shaft and 10.5:1 Wiseco piston). The bike had an oiled foam filter in the stock airbox, de-snorkeled, and the foam was coming apart. I replaced the foam filter with a stock, new, Honda paper filter. I decided to check the valves, too. Three of them were tight - like maybe not closing all the way, that tight. Everything is back in spec now. I replaced the spark plug with the standard one (the "8" one) called out in the owner's manual. I took the supertrapp off and put the stock muffler back on - much quieter, didn't change the popping. I drained a little fuel out of the carb and it was pinkish orange and smelled not like anything I am familiar with (I know gasoline, avgas, diesel, Jet-a) so I drained it out. I refilled the tank with fresh 93 octane. PO later told me it was "race gas, the good stuff". Now, the bike starts great - but only if on FULL choke. It pops a bit at idle, but doesn't seem to pop while on the throttle. I rode it down the street a bit. I can't seem to take the choke off without it dying. It all points, to me, to a carb issue. I spoke to the PO and he said it has the "hondaline power up kit in it". So, do any of you have a link to a "baseline" setting for this carb? I'd love to pull it apart, rebuild it with some combo of known good jets, etc, and see if I can get it to Idle. Thanks in advance for helping a new guy who should have known better... damn, I should have known better.