31-08-2024, 08:35 PM
(This post was last modified: 31-08-2024, 08:39 PM by Reckless Rat.)
Your two comments about it being "rumbly under load and pinking" tends to suggest that you need to back the timing off a bit. This is probably because the head has been shaved. I was amazed how much I had to back off the timing on mine when I fitted the HC head. The Bosch 009 dizzy also benefits from having the advance restricted. It's an easy fix.