power loos, not all cylinders are working GSX600F

[Gamer]

Hi all,

I have a fairly difficult problem. So it will take a while to explain

My bike when cold starting not always went so nice into revs (choke on). I have to wait several seconds and than all 4 cylinders kiks in and rev are high and I am happy.

Recently it happend that on the way I suddenly felt no power. When I have squeezed throttle hard (max) after few seconds engine was fine and I felt some power back, but as soon as I put throttle back - no power. If I engage clutch - engine stops very quickly.

When stopped I tried to run it again - only way to do it was with fully open choke!!!
It happened already few times.
Also I have noticed a bit of smell (like hot, burning smell)
Did I overheat the engine or it is dying?

Fairly recent plugs and oil, all levels are ok.
Thanks for help.

[pilninggas]

Gamer, sounds quite like it could be coils (or plugs if the bike runs rich). I assume the gsx600f (the teapot!!) is wasted -spark? Might be worth running a multimeter over the coils and checking the impedances. Also a visual check of leads for damage and in the dark for arcing and corona.

Im in Bristol also so if you want me to pop over, no problem.

merv

btw i have a new coil somewhere, so substitution could be tried.

[Gamer]

So taking all fairing apart again - tank goes up and I will test it in dark too next week.
can I change coils (left to right and right to left) and see if this will sound different?? - or better no?

[Jon_W]

Sounds like a sticking float on one of the carbs.

Does it smell of fuel??

Check the plugs. Are they all the same colour? They should be a dark brown.

Try a light tap of the float chambers, see if that helps.

[jonnydangerous]

from VERY cold, start the bike, if its missfiring VERY briefly touch the downpipes to give an indication of which one is cold, that cylinder isnt working.....

[Gamer]

from VERY cold, start the bike, if its missfiring VERY briefly touch the downpipes to give an indication of which one is cold, that cylinder isnt working.....

Good test to be honest. Few days to test so I will know for sure if it is only a certain cylinder/s or it is changing

Jon W
It is more like rubber burning - not fuel

[pilninggas]

So taking all fairing apart again - tank goes up and I will test it in dark too next week.
can I change coils (left to right and right to left) and see if this will sound different?? - or better no?

yeah i'd leaving the fairing off until you sort it. If a coil is 'breaking-down' then you can remove one and see if anything changes and then vice-versa.

[Mark_Able]

If you've had the tank off, you might have trapped a breather pipe. Easily done, and would have a similar affect... :-?

[Gamer]

Thanks all - but it turns out I have overheated the engine at some point - question is why???.

Coils are looking good
All 4 spark plugs do generates equal spark
Fuel line and all others are connected.
Plugs in nice dark colour, not wet, not oily.

Only thing I have spotted - there is a barely visible white residue in oil. I have spotted it by accident to be honest - after stopping the engine I had a look and when oil was filling the window it came with this small white mark going through oil.

Any idea what is letting go in my engine ?? :-?

[Jon_W]

Could be anything.... if the engine dosen't sound bad, the only way to tell for certian would be to totally strip the engine. If you are that worried, drop the iol out and look in it. If it's full of metal, then there's a problem. If not, your fine.

Does this cutting out only happen in the cold???