hi there if it works on primy then problem is with p2 get hold of another cdi unit or use the primy 1. there are a lot of shit indian cdi units on market today spend a bit extra on an italian 1 .also only connect the stator wires as this will eliminate ignition switch problems ,hope this helps ,Macca
If you say it can work on other system, the problem may be not on the hhp cdi, have you check the original system on px200? The hhp I use also need to remove the plate like you, but I think it cannot work well, as it cannot keep the engine idle at 1100 rpm, it need to rise to 1500rpm... It seem to fast.