I'm looking into buying a new 2012 or 2013 from the dealer for use on trails and at my camp. However I have heard that the oil has to be changed every three hours and if I'm just trail riding is this necessary? If not what would be the new oil change interval? Do you think this bike would be reliable if I do simple maintenance for just trail riding and maybe a couple jumps? (Vavle adjustments, filter cleanings, oil change) please detailed answers ONLY! Short half sentence answers will be reffered to yahoo abuse. Any other tips or info would be greatly appreciated.