Join Date: Sep 2017
Location: Seattle, WA, USA
Air filter, exhaust and tuning don't tend to do too much. They can change the shape of the torque and power curves, so you might see a bigger peak at the expense of flatness say. I'm always suspicious of '10% more power' claims without seeing the whole dyno curve.
I think cams and porting will be more effective in genuinely increasing the area under the torque/power curves, rather than just reshaping the curves. In other words, they do actually deliver more, not just increased peakiness.
Ultimately, you could just drop a Thruxton engine in...that would be fun. You could then add all the tweaks the Thruxton customer base has come up with. Double-dog-dare you!