Have you tried to put it in any other gears? Make sure it's just first gear that don't work, before you tear into it.
I agree with Shadetree. For the price they would charge you at a dealership, you could buy another good, used ATV.cost ???..any time you mention dealer ship..that alone tell's me..stay away !..lmao..for what they would charge you to fix it..you may as well buy a new motor..thats about how much they are gonna charge you...lol..this is why i do all my own work..so i save a ton of cash from not giving it to the dealer ships..lol.sounds confusing for me lol
do you know a rough estimate of how much its gunna cost if i just took it into a shop?
we have a big atv honda dealership not to far from here