[Peterbilt06]

I have a ktm 450 snowbike and the bike is short on power when it is in deep snow and bogging down I have heard that it is best to bore it out to 540 or 525 or add a turbo or do cam work but not really sure what I can do but another thing that I want to add on is the rotation assembly I want something that will hold up for awhile
Have heard of bikes at a 122 to 140 hp and they say that it's perfect but I don't know what they did to make that

 

[quad97]

What year is your bike? This forum is primarily for the KTM ATVs which used the RFS and RF4 engine platforms. There's some performance overlap with the bikes from 2005 to 2012. The RFS engines can be bored and stroked all the way to 600cc, but it gets expensive. The RFS engine isn't known for being a high RPM powerplant that is favored in snowbikes.

The most you're going to really get out of a single cylinder 450 engine reliably is about 65hp. To get 120+hp is going to require a snowmobile engine transplant I'm afraid.