9800RPM!!! Like to see ur belt handle that RPM for very long...LOL
Old Nytros and new Vipers... header, airbox mod, can, PC5 will get u 145HP @ 9000 rpm....maybe 150 if ur lucky. That said, torque comes up throughout the powerband so it's a very different engine with these mods IMO.
Beyond that...Turbo is much easier and more reliable that trying to run belts at 9800.....
My 0.02
OTM
I would disagree with the belt issue. i put over 1000 miles on 1 belt on my old 05 yamaha viper spinning at 10500 rpm. yamaha clutches and belts are 10 times what any other brand is. i have had 3 other vipers and 3 other mountain max's spinning at 9600 with no problems what so ever. just use a shallow helix on the secondary to keep your belt tension and keep your secondary wound tight.