Hey all...I've decided to change up the gearing on my 400S. Been riding mostly highway to work lately with 14/45 sprockets and am finally fed up with my top speed of 60mph Ordered 15/42 from Wheeling, so it's gunna be a big change and I was wondering what kind of comfortable/safe crusing speed I can expect with the new gearing. I don't need to be doing 90, but if I could do a steady 75mph without over-revving the engine, that'd make me happy. ( I don't have a Tach on the handlebars yet) Also, my mom gave me a gift certificate to amazon.com for Christmas so I ordered a new chain for the sprockets. It has a long name so I'm worried it won't fit the Z. It's a D.I.D. 520vx2gb 120 link chain. This chain will work right? I saw on the Epic website a 520vx chain that he sells for the Z, I figured its the same x-ring chain I bought, but correct me if I'm wrong.