Hi guys, my name is Brian I am new here. I just bough a 2001 polaris xplorer. The motor is all new, it was rebuilt less then 3 hours on it. Today I took it out riding and it was running good at first, once it warmed up it was starting rough and if I gave the bike more then 1/4 to 1/2 throttle it would bog down real bad and if I didn't let out of it the bike would stall. So I rode the day at a 1/4 throttle... Loaded it on the truck, drove the 1 hour home.. The bike fired right up with no hesitation or bog at all. Any ideas what this could be? Thank you in advance for any help.