Use Singleator bike chain tensioner to replace stock?
I could not get my 80cc 2-stroke gas mod chain tensioner to work right. It's a bearing-less nylon bobbin that is pure junk. The skateboard wheel idea isn't working out for a couple of reasons. Why would it have to be a roller, it seems like a sprocket wheel could serve the purpose. Why not adapt a sprocket wheel from a junked derailleur or use one of the tensioners called a singleator chain tensioner?
I was going to post the link in eBay to the Singleator tensioner, but it wouldn't allow me to, so just do a search on ebay for Single Speed Chain tensioner" and/or Singleator.