I just picked up a Murray Track 2 built 2001 or so. It looks like new. The person I got it from said he and his 13 year old son had rebuilt the carb recently because it had been sitting. It would only idle for me with the idle turned up and was surging a bit as accelerating and at top rpm till it smoothed out. I pulled the carb apart today, cleaned everything and reassembled. It idles and runs well but only with the choke at half setting. I'm not going to mess with it anymore...I see many carbs on Ebay for under $15. The pic on OldMiniBikes's site looks the same for $23 but they show out of stock. Is any Ebay carb better than any other? Do they work OK? The feed back on most of them looks good.