I've got a 1995 Magnum 425 4X4 that is in need of new chains and sprockets. It has been a very good machine for me and I'd like to get a few more years out of it. Looks like I can pick up a complete chain and sprocket set on eBay for a good price. But I'm not sure how difficult it would be to replace all the chains and sprockets myself. Any advise on whether I should attempt this myself and would I need any special tools? Thanks.