Just put a brand new stock chain on my 03. The rear sprocket is 48 and the chain flows smooth, but the front (16T) binds going forward. In reverse the front flows fine but forward it binds. I'm thinking the front sprocket is the right teeth but maybe the wrong size. I just got the bike about 5 months ago and I have had to fix so much garbage the guy before me did that this doesn't surprise me. Any other ideas what's causing this?