FZS600 - No power, won't go faster than 50, engine not smooth

[Torque]

have you chkd the diaphrams in top of carbs?..ie, for splits or holes etc?....also make sure sliders are moving freely?....

They are fine, sliders move freely.

Choke's not stuck in the "on" position is it?

They are not stuck. It's fine.

Have you tried by-passing the fuel pump and fuel filter yet?

Yes. Did not help.

Have you checked the air filter? Sounds like classic symptoms of a badger in the airbox. I'd check the airfilter and if its ok clean the carbs.

Not yet. Thanks for advice. Definitely will do it tomorrow.

This still sounds like fuel over or under supply or air starvation to me.
Are the plugs sooting up? Check the fuel levels in the carbs by opening the drain with a length of transparent tube attached in a "U".
Have you checked the air intake is clear?

When I changed plugs. Old were suprisingly clean, so it's like under supply or air starvation?


Assuming:I've dismantled carbs, cleaned with some Halford carb cleaner and screwed them back.
However I was fighting almost 2 hours to fit them on bike and it's f**** hard to me.

First I've spent almost 30 minutes on connecting throttle links.
After that about 1 hour fitting carbs into airbox rubber gums then still did not manage them to fit into engine.
I think also that doing that on the cold evening does not help, since temperature make that rubber not soft enough.

I don't know what's the easy method to do that? Maybe use some soap/oil to fill the rubbers from the inside?


However seeing above advice, will check the airbox when carbs are fitted properly (hopefully)