I took it to around 90 mph with no fuss and a bit in reserve, it saw 80 mph in 4th gear with more to come, as well.
I retarded the intake 'S' cam one tooth on the Harris Scrambler and got 160 PSI compression on a hot engine, stock AVL head, stock piston, with a 30mm PWK flat-slide carburetor, throttle wide open. I don't think I lost much, if any compression by doing this.Royal Enfield people are good peopleCheers,Bill
Did you happen to have a reading of the compression prior to the change?
Thank you, Paul!Just wondering about that piston in the picture. I thought the AVL pistons were flat or dished. What is that piston?
I was wondering this too. That piston crown doesn't look familiar. It almost looks like something out of a diesel tractor.Scottie
I would be happy to comment on my views of what might be expected to happen performance-wise, regarding the different timings of the different installations of these cams, if anyone wants to hear that.