So i recently purchased a 2014 kx250f...the bike seems in good cosmetic condition. today i took it riding for the first time. it was doing just fine for about 10-15 minutes of riding but then as i was on a straightaway it just bogged down and wouldnt start back up or couldnt catch it and keep it started in gear. im thinking it could be a combination of bad gas and bad spark plugs. before i went riding today (11/24/2016) i topped it off with regular gas. i guess that would explain why it was doing okay the first few minutes then bogged down. Someone PLEASE HELP ME! any advice is better then no advice...i really appreciate the help yall!