You need a 520 style chain with about 106 links in length and cut it down a link or two. There are plenty of good ones out there. Also some bad. The more tensile strength they have the stronger they are. There are a few different styles non o-ring, o-ring, x-ring etc There's lots of info about the different style of chains on the forum. If you are replacing the chain it is always recomended to replace the sprockets at the same time. I am sure there are plenty of chains off machines that will fit but it's easier and cheaper to just buy one like I listed above.