Sounds like your clutch shoes are getting worn, I replaced the stock shoes with aluminum right after I got it - with these [link=http://www.novarcproducts.com/clutchshoes.html]Nova[/link] .... they're much better, you can also add the set screws as weight to make them grip harder but they'll wear quicker. Either way though, they're better than stock.

You have to take the back plate off to get to the one way bearing, there's 8 screws to take out to get to it - it's easy though