The track on my son's XCR 120 needs to be replaced, I bought a new track from Michelle at Oregan Trail sports ( Thanks, great service) but am having a hard time getting the drive axle out. Do I have to drill out the rivets holding the cover plate? It looks like the sprocket is held on to the axle with a roll pin? Do I just need a pin punch to drive it out? If there is a thread on this I can't find it. If someone has a link that would be great. I'm getting a lot of pressure to fix junior's sled, so any help would be great, thanks.