stuck piston rings

[pork6156]

Hi all.
I have not been on here for a long while due to illness.
I have a 97 Kwak zzr600. I have not used it for two years due to illness. I am now in a position to ride again. So I have tried getting the zzr back on the road.
However I have some stuck piston rings.
Any ideas how to free them without taking the engine to bits.
Cheers guys.

[Taught2BCauti...]

I have had success in the past with an Ultrasonic cleaner - or place in hot water, then leave it soaking in vinegar and check every hour or so until they are free.
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Honda Varadero XL125(V8)
www.TheFutureIsHere.eu

[Pete.]

How is he going to do all that without taking the engine to bits?

Come to think of it, how does he know he has stuck piston rings without taking the engine to bits?
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Taught2BCauti...]

ooops! I was assuming engine was already in bits, and that the piston rings were stuck in the grooves - otherwise, how would you know???

Sounds like a possible seized engine, and a wild guess at the piston rings being the culprit.
____________________
Honda Varadero XL125(V8)
www.TheFutureIsHere.eu

[lihp]

I highly doubt the rings have seized the engine.

inb4 flat battery won't turn starter, but op can hear solenoid.
____________________
covent.gardens: lihp is my most favourite member ever

[bikenut]

redexorsimilar drain oil fill cyl apply heat gun
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nuts about bikes

[unitynotsocri...]

Pour deisel down the bores.
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nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS

[pork6156]

hi guys, thanks for the replies. Let me explain what is going on.
As previously mentioned I have not used the bike for a couple of years.
When attempting to get it running again it sounded like it was not firing on all four cylinders.

The carbs have been removed and cleaned.
The plugs have been changed.
Coil packs have been replaced.
New Battery.
New oil.

The bike will run on all four and sound fine for a while, then it cuts out. It will not run under 3000, it blows blue smoke and the exhaust is soaked with oil and fuel.

So the mechanic thinks it has stuck rings.
Any other ideas guys?

[Pete.]

There's no reason the rings should magically stick from 2 years of standing. A leakdown test is what you need.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Clutchy]

[temeluchus]

[_Iain_]

[bikenut]

so, rings dont stick and valve don't either, next you'll be saying that caliper pistons don't stick/corrode in solid as well, so you all live in Norfolk?

when an engine is stopped, especially a multi cylinder one, are any valves open?? summer warm air, winter cold air, damp etc etc etc ........think about it dudes......... :karma:
____________________
nuts about bikes

[temeluchus]

[Pete.]

[stevo as b4]

I think 3years of leaving my ZX6R standing, did the piston/ring sealing no favours. IMO if the rings on one or more pot are sticking, then it will run ok to start with but after a while you will see a bit of blue smoke wisping from the exhaust.

A compression test to find out more should be done to see if any pots have low compression pressures and which ones?

I'm sure in many cases stuck rings may free off again in use, but if not, then I would try filling the cylinder/s with penetrating oil and leaving it over night or so, before spinning over the engine with all the plugs out to expel the fluid in the bores.

[Taught2BCauti...]

[pork6156]

Again thanks for the comments. Here is an update. I have the bike back.
from cold it starts fine with no issues and idles well. It sounds very nice.

However once it is hot this is when the issues start. It just wants to cut out and under 3000 revs there is no chance. It stinks of fuel and the oil is full of petrol and it it does not run on all four cylinders.

[temeluchus]

[lihp]

[spriddler]

[Pete.]