after carb clean balance all cyclinders are hot now for the rest of the bike

[His Dudeness]

I edited that last post to make it a bit clearer.

I blow air though & make sure all the carbs sound the same though each oraface,if not it's not clean enough !
The problem I had was a flat spot about 1.5-2k so it's just where the idle jet crosses over to the main jet circuit,the main jet emulsion tube is also prone to the green/yellow coating inside.


You can buy the exact new parts for these carbs,because their commonly used in other models.


I did read that paint thinners can soften the gunge but I've never tried it myself.

It's more about throttle position than rpm. If the flat spot is at 1.5-2k you'd only have the throttle open a tiny bit so I'd estimate 90% or more of your air/fuel mix would be from the pilot circuit. If you're having a flat spot there and you think it's fuel related you should clear out the pilot air jet, pilot fuel jet, mixture screw and very importantly the transfer ports because that's where the fuel comes out. If the transfer ports are blocked cleaning out the jets isn't going to solve the problem. The transfer ports are so small that carb cleaner or an ultrasonic cleaner is the best way to dissolve the crap and old varnished petrol. After everything is clean adjusting the mixture screws and balancing the carbs would also help but everything has to be clean first