Dod you by the auto tune already? If not go find a tuner with a multi spectrum gass analyzer and pay for a few pulls. Worry about overall fuel rations not just wide open tthrottle. I'd say if you a/f is in there and your say 140 to 150 hp with about the same torque don't waste your money work on the suspension. Ak 20 cartridges and some good rear shocks will keep you grinning. Once you can out ride her the motor kn the curves then piss money away saying mine is bigger
just my opinion as I have pissed plenty of money away for mp apparent reason.