Mike-AK
Husqvarna
Pro Class
Because chain wear thru guide? What'll they rev to Mike? Will i be able to Jump trails @ 60 to 65 with a 50? I glanced at the TXC 310 on the showroom floor when i picked mine up and saw a 50 on it, so was thinking I'd start their but your post says high r's @ 60mph. I love grunt and not a fan of flameouts. Will most likely start with the 50... Will see once i get her loosened up and barkin.
My personal opinion is if you want something for 60-65 on the highway, you have the wrong bike. These things are built for quick acceleration bursts up to 45 or 50 MPH. Also (my opinion again) with the close ratio transmission you lose too much on the bottom end when you start decreasing rear sprocket diameter. For dirt/trail use, I'm thinking a 52-tooth sprocket might be optimal, and a 49 or 50 tooth a good compromise for trail/fire road use.