Oh, speed. Uhm, 'i am a law abiding citizen who always follows the posted road speed as advised' and have never, ever gotten my 16/31 gearing to bang off the limiter at 12k in 5th gear. Ever.My 5 axis was extremely loud too but a couple straight cut cam gears means even more soundtrack for the Kitaco.
Can you elaborate on valve adjustment? Have the lashes changed yet during break in?
Lastly, what type of speeds are you getting?