All or anyone,
How have you juiced up this bike? My 9 year old is the rider and she is holding us up....have taken the bike to the dealer and he has removed all the reducers...but still no real power.
Thumper1

 

Kinda sounds like time for LT80. My son is 3 and we just stepped him up to an 80. The 50 in the sand was barely cutting it. You should be able to sell the 50 (depending on year) for about the same price it will cost you to get an 80. The 50's are alot harder to find so it drives the price up. I sold my 50 for 1000. and bought the 80 for 1000. + paddles,rims, and some other stuff like a battery. So I almost broke even.