Vertical Cyclinder Problem

Not bad IMHO

 

If it has fixed it, but it didn’t and it would make me wonder if the other stuff was done right..

 

Check the ignition pickup at the crank, there is a test you can do with a multimeter at the igniter boxes (search on the forum). I had one that started to fail and got intermittent firing problems on one cylinder and caused me to chase my tail until it finally gave up the ghost and I could diagnose it properly. Electrexworld part (about £50 IIRC) and a bit of soldering later and all has been well for the last 5 years or so.

That said, all the other suggestions are valid too. Sod's Law says that you start to eliminate fuelling and it turns out to be sparks and visa versa

 

Cps airgap
Flywheel still tight
Swarf on cps face
You need a doner bike to swap parts to diagnose

 

I don’t think so, you need to establish and fix the root of the problem first.

 

I wonder how they justified replacing the ECU? I know it’s sometime ago, but that isn’t right that they replaced it possibly on a whim and didn’t give you the old one back, particularly as it hasn’t solved it, as said. I’d be tempted to phone them even now.

 

Dino find the problem fix the problem optimise its performance at the same time simples

 

Have a look at Avanti race parts had one from them remapped great service