I been having this problem for a very long time.
I have 2 dirtbikes and 1 four wheeler.

I ride the four wheeler a lot. It is for my sisters, but I ride it too..

My problem is, when you put the atv in forward, it doesn't really want to move. But, when you put it in reverse, it moves GREAT! I suspected this will happen because when we first bought it, it didnt move as fast. My 80 cc dirtbike moves faster. My Sisters friends 90 Eton viper moves faster. So, there was a lack of speed when we bought it.

Well, I played around with it a lot. When you would first start it up in choke, it will go pretty well.
i found out, when it would get wet, it goes better. I washed it one day, then still had it running. Then, i took off, and it felt like it was moving faster.

And, when in reverse, it will go VERY well!
I had this problem for so long now. No one really helped me. But, on someones post, a lot of people helped him, so I thought it was going to be the same with my post.

Someone please help me out.
Give me ANY reason that it can be like this.
You can ask me anything, ill post it.

Thanks so much