Hmmmmm......the recommended CG is 4 7/8". I started out at 5.5", and thought it was too nose heavy. So I moved the ST 90 as far back on the mount as it would go. That put the CG about 6.0" back, but it still felt too nose heavy. So I replaced the mount with a smaller and lighter 60 size GP mount, with the engine mounted back as far as it would go. That gave me a 6 3/8" CG, which I'm satisfied with.

In fact, I never installed the cowl or the wheel pants because they would have added unwanted nose weight.