Hi a couple years ago (2012) we bought 2 Tao Tao 125cc ATVs. After putting about 10 hrs on the I went to shift into 2nd and the engine started making a loud clanking sound like some of the gears in the engine weren't connecting or something and then it just responded like neutral. So now only 1st works and if I try to shift to 2nd it just makes the clanking sound and won't move. I'm willing to take apart the engine but I'd like to know what's causing this? Thanks