Smokin and I are looking at getting some new spokets and a chain for his xr250. We were wanting to know if you could use a non oring chain on his bike? Even if you would get one that has the same strength of an oring. Also where do you guys order your sprokets from? Most of the time I just order out of RockeyMountain but I want to try something differnt. Any ideas? Im asking all these questions because Im babysitting smokin's bike and doing some maintance and repairs on it for our next ride.