Right, above 3000rpm it still does the same. The other day I slowly put the choke on as it was running (was warmed up) and as it got to around 3/4 on the cylinder then fired up and ran ok. When I took the choke off, it went back to 3 cylinders.
The day after is when I went for the ride and it ran like a dream even on tickover, no choke. I went up to 8000rpm and no problems.
I'm struggling to find ht leads that will have a plug cover to block the spark plug hole up to stop road crap getting into the hole and dropping in the bore when I remove the plug (access is a hug prob on my hands. Its a rad forward job all the while).
Right today after work I took the ht lead off the plug and tried it on the original old old plug and it fired nice and bright. I have not taken the new plug out yet today.
I am still worried that there maybe fuel problems so I took the carbs off an hour ago for the 4th time. I checked the pilot jet with a very powerful eyeglass and it is lovely and clean. The main jet on that carb is the same, clean. No muck anywhere and a brand new float valve fitted friday. The only thing I know of is the little filters on the back of the float vavle seat have come away from the body and I can not for the life of me find a replacement in case this is restricting fuel flow so I might take these out and reply on the brand new tank filter and fully cleaned and sealed tank.
I checked the pilot screws and they were all different from each other and turned out more turns than the manual says so I cleaned them and set them back to 2 turns out.
I'm trying to think what else to check or look at while the carbs are off on my kitchen floor. I'm getting a little peed off at this now.
If it was a straight "it doesn't work" problem I'd be happy but one min it works and the next it does not is so frustrating.
I'll keep you guys informed. I'm going to borrow some ht leads off dad just to eliminate.
Thanks for all your help.