justinwatson88
01-18-2009, 09:45 AM
i bought a brand new 2007 400ex in 2008. it got the first oil change in august and i rode once after that. i put it in garage and went outa town for work. it run just fine when i put it up. i got back outa town in llate november and run the battery down trying to start it. i changed the sparkplug and got it to run. put it back up and got it out yesterday and it wouldnt hit a lick. i drained gas and put fresh in. checkd for spark and i have that. took carb off and im gettin gas. i tried pulling it off and it just sounds weak and every now and then itll fire for a second then die. its also backfiring while trying to pull it off... i called honda they said a weak battery can keep it from running even if its giving spark... i got the batt on charge now.. im far from being a mechanic... any suggestions? got gas got spark and it run fine when i put it up last. the one time i got it to run i had to hold full throttle and it sound real deep and was popping every few seconds.... appreciate any help thanks