JOB COMPLETE...………..valve gone forever!!! 1 burnt out drill 4 broken drill bits lots of swearing Im an ace mechanic ;-)
A near 800 mile, day trip to test the bike minus the flappy valve thing! Big difference! Little bit deeper, Defo sharper and no real flat spot Cheers for all your advice
There'll be no dash lights, because the valve is still turning, just theres no butterfly to restrict exhaust flow