I bought a 2005 Eton 90R Viper for my daughter. I replaced the carb and fuel system due to the machine sitting for over 5 years prior to my purchase. I went through and cleaned everything out and it starts and runs pretty good. When she rides it will go fine for 15-20 minutes then it starts to lose power. However the engine seems to be running fine just the clutch seems to quit shifting. If you throw it in reverse it backs up and runs fine but going forward it won't hardly move itself on flat ground.... What should I look at in my clutches??

 

Belt obviously,but the drive clutch sliders along with the rear centrifugal clutch may be what's wrong.Alpha Sports - E-Ton America Parts Catalog