i have 03 400 and it was in my garage in my mountian house for about 1 and halfs months cuz its hard for me to get up here when i got school so i went to start it and it just does'nt seem like it wants to start i can tell there is'nt that much juice in the battery any1 think i should drian out the carborator and but some knew gas in it? its turned ova once and i gave it some gas anf then it bogged out any1 have suggestion?

 

Hey dude, I've got a 2003 400 EX also and so does one of my riding buddies and his battery would always run down...So far mine has not but I have started mine at least 2x a week...But from what I understand, if you don't start it, it will lose its charge.....however The solution to your battery running down is to get a trickle charger and attach it to the battery. I got one called a hotshot and it does the trick. It supposedly will not over charge your battery and it's a simple plugin that you can ziptie to your frame and then when done riding, plug it back in...In regards to your fuel...I would definitely drain the bowl in your carb if your not going to be riding it for a couple or more weeks...By not doing so, the gas will shellac inside your carb and you don't want that......This is according to several people that I've talked to, not just my knowing it.....Hopefully what I've told you will help.....Best of luck....

 

orry I missed it the first time,,,but Fresh gas will definitely help it run better.....92 or higher octane......And I would drain out the stale gas and put fresh in......

 

thankx man