I'm looking to add some low-end power to my daughters 2005 sportsman 90. The trails we have around here are very rocky and rough and she has trouble climbing hills because she cant hit them fast enough. We need some slow speed power so it wont bog down on the hills.
any suggestions hill be appreciated.

 

You might want to try changing the sprockets to get lower gearing.If you want to get into the engine a high compression head will give you a little more bottom end power.

 

Yes gearing.
Removing 2 of the front clutch rollers may help also.

 

thanks for the tips, guys, i may try them both.