Hi, and thank you in advance for looking into this for me. My gf brought over her 400 and it runs perfect when it wants to. for the most part is runs fantastic but some days it chokes and pukes when you goose it (get on it), and other times (for days) it runs just fine... any ideas as to what is going on ?... also, she ses the cooling fan constantly runs, draining the battery.. any ideas as to how to fix that as well ?..... my bad, im a carpenter and I have zero mechanical skills so I have no idea how to diagnose these problems, but Im sure I can replace a filter ? or a switch ?..... maybe.... thank you ?... if this post is somehow not allowed.... sorry..