Unstable idle with hot engine(sometime stops)...Help please!

[HansJ]

Have you noted where i am based?

I had a "below zero" ride 3 weeks ago. Engine stopped on the highway. No way to get it going again. After some 5 mins it started without any problems, probably because of the engine heat had had the time to do it's magic to something... And since i have FCRs, i don't have the coolant pipes attached. This was a first time for me, never had any problems before, but i guess going at a steady speed for an hour was what was needed.

So yes, i agree. But on really hot days, i have noticed some strange behaviour as well.

[Mincehead]

Easy fix:

Get some copper automotive brake pipe and wrap/wind it twice around the inlet stubs, then utilise some silicon tube and re-fit the coolant loop to it.Hey presto no more icing.

[dandywarhol]

Have you noted where i am based?

I had a "below zero" ride 3 weeks ago. Engine stopped on the highway. No way to get it going again. After some 5 mins it started without any problems, probably because of the engine heat had had the time to do it's magic to something... And since i have FCRs, i don't have the coolant pipes attached. This was a first time for me, never had any problems before, but i guess going at a steady speed for an hour was what was needed.

So yes, i agree. But on really hot days, i have noticed some strange behaviour as well.

Hehe - I'd noticed You'd probably have seen iceball in the inlets. It doesn't need to be below freezing to iceball - vaporising requires taking away heat from somewhere so it takes heat away from the moisture in the damp air - next thing you've got ice lollies

I remember in the 80s a cop was killed on his Kawasaki in line 4 when it iceballed and stalled the engine - Kawasaki fitted carb heaters as a retro fit straight after the court case..........................

[hjp1968]

Silkolene do some Petrol enhancer that is meant to stop carb icing it was always suggested for ZXR750's
You could try that

[trixi]

Erratic tick over is often caused by air leaks in the induction system. It's unusual for these leaks to "come and go" with temperature. But here's a simple , quick , cheap , and pretty reliable way to check for air leaks around your carburetors. Buy a can of easy-start, ,startyabastard, type stuff. I don't know what you would call it in Spain .But it is an Either based aerosol that is used to help start worn engines .Start your engine and let it tick-over. Spray small amounts of the easy-start around the carburetor, pipework, and intake manifolds any air leak will cause the easy-start to be "sucked in" to the air-fuel mix entering the engine. This will change the idle of your engine. Generally making it speed up.If it makes no difference to the tick-over, then you can be pretty sure that you don't have an air leak. You can try this with your motor either hot or cold. It wont fix the problem , but it can help find the place where air is leaking in.
A WORD OF WARNING. Easy-start is very volatile(flammable , explosive) it can damage paintwork . Use it in small amounts. DON'T OPEN THE THROTTLE / REV THE MOTOR WHEN YOU ARE TESTING IT. There is a possibility that you may damage the motor . if you. 1/ spray a lot of easy-start into the air intake. 2/ rev the tits of your engine. I am not sure if this is the cause of your problem. But it is one way of eliminating air leaks as the the cause.

[trixi]

Carb' icing. I had a GPz600R, (one of the models Kawasaki issued a recall on) back when this was in the news. I lived in England at the time. I never had a problem with it. Even though i rode all through winter. Even in ice and snow. Those were the days!! I held the extremely unsympathetic view that if you couldn't work out how to dip the clutch in time to avoid a crash should your engine stall and lock your back wheel (for whatever reasons) Well you probably shouldn't be riding a bike in the first place. "Cos if the carb' icing didn't get you then something else surly would !! I never had my GPZ modified. I held the view that i would rather risk carb' icing than possibly lose some performance from having my air fuel mix artificially heated up and losing density. Looking back it seems to be a strange way to think. But I was young and the possibility of going 1/2 a mile an hour faster seemed to good to ignore !!!

[george]

simple fix
new suppresor caps.