After my friends ride my banshee they notice its really putting a beating on there arms. my friends also have banshees, 400ex. I notice this also. What can be doing this? I still have stock shocks, wider axle, flipped wheels in front, tag t2 quad race bars.

 

Flipped front wheels for sure takes more effort not only to steer but to keep the quad going straight. Larger than stock front wheels have the same effect.

two big things to correct this problem is a steering dampner (the best mod for any quad) and to fill your handle bars with sillicone (this helps dampning vibration wich makes you grip the bars harder)