Hi Mark. Yep that's me! And yes I had primary belt issues that meeting, but changed belt make and been fine since. However had all shorts of issues with the motor, so we are re engineering it a bit, pistons, valves, roller cam followers that kept breaking and re porting the head. The inlet ports were a massive 36mm, I am guessing that Dave Nourish used the same head castings on the 500, as he did on the 750 and 900. So hopefully we will end up with a motor that should go and last as Weslake intended? Oh and we are re making the exhaust and I have a full fairing too, as you do!