So I just picked my bike up and drove it back 25 miles to my house (I'm a new rider so it was exciting). On the way I experienced 2 significant issues. First off, sometimes I couldn't find 1st gear when stopped. I click down and it doesn't go anymore but then I start and realize im in a higher gear and stall out. Also, quite a few times, near the end of my trip, I couldn't get higher than 2nd gear. It just would click up. While driving i even shifted back down to first then back to second and it still wouldn't go to third. Any idea what the problem is?? Thanks!