Hello, im new to atv's in general, i have a Baja wilderness 90 the automatic one, i was curious of suggestions to upgrade its performance, i know about unplugging the rev limiter under the rear wheel, but has anyone done any engine swaps on this particular Atv? im interested in maybe a 125 cc semi auto 3 speed + reverse any suggestions would be helpful, thank you

 

Are you new to fabrication? If yes then an engine swap may not be right for you unless there is a direct fit replacement (generally unlikely). The list of potential challenges you may run into on an engine swap is too long for me to type...