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Friends GS1000 motor toasted?

GabrielGoes said:
I know lol i was just saaying the guy's leak thing was pretty interesting i've never heard of such a thing
Click to expand...

The leak down test is real, it will tell you exactly which valve needs to be adjusted. So does a feeler gauge.
 
hence my initial statement of severe lean condition. a plug that has been in a running engine and is snow white bodes ill for the motor. I wish I'd taken pics of my friends old RD250 when he advanced his points too far, and the resulting piston lightening mod.
 
Graham said:
Why waist time adjusting the valves when the piston could be bad? The leak down tester will tell what the problem is. A real mechanic will find the problem before he takes your engine apart (even the valve cover).

BTW; Valves don?t all of a sudden get out of adjustment and cause 0psi compression.
Click to expand...

Why fix something for free when you can spend hundreds of dollars rebuilding it?
Yes, valves do get out of adjustment and cause 0 psi compression.
 
Try the valve adjustment, what are you out some time big deal thats what owning one of these jewels is all about. We had a GS 550 a few yrs back that we took to Loudon for bike week, as a burn bike , just to burn tires we beat that thing relentlessly for 3 days smoking tires,broke the tach cable over winding it 12k plus got the exhaust cherry red from the head to the tip of the exhaust can[aluminum yoshi can] and when the exhaust cooled the can cracked and fell off. Moral of the story is the motor on this thing took it, it still runs today. and still has compression, probably not what it should but still enough to run. meaning these old GS motors are bullet proof it takes alot to kill them.:D
 
tkent02 said:
Why fix something for free when you can spend hundreds of dollars rebuilding it?
Yes, valves do get out of adjustment and cause 0 psi compression.
Click to expand...

You would have to go past the valves (i.e., pull the valve cover) to deal anything that a leak down test might reveal. While you're in the neighborhood, give those valves some love. Tickle their naughty bits with a feeler gauge. If they are coy and won't open up for you, remove their inhibitions with a sexy new shim.

That may be all it takes to get some more sweet, sweet loving out of that bike. Valve adjustments are always worth doing.
 
lol, me thinks Mr Cinders is spending a little too much time in the garage
 
tkent02 said:
Beat on it all you want once the maintenance is done and it's running correctly. These engines are bullet proof, however they are not idiot proof.

In the future, it's a good idea to do these simple checks before ruining the engine. Much simpler to repair before there is too much damage.
Click to expand...


rustybronco said:
Quit guessing. adjust the valves and go from there.
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A couple of awesome quotes here.:cool:

Valve adjustment is one of the most importing bits of engine maintenance...yet often neglected.

Another common, but very dumb thing, is running an engine with a header without rejetting the carbs. Hope both of these things were not done.
 
Harry P. said:
lol, me thinks Mr Cinders is spending a little too much time in the garage
Click to expand...

I would almost agree. Mr Cinders, we demand you put down that tool, step away from the bike, and go back inside to your wife/girlfriend for 3 minutes.:cool:


Then you can come back out for a bit.:D
 
Sorry guys but one does not go from a running engine to ZERO compression without damage...there are some questions but two things stand out in my mind The inner two cylinders hmmmm makes me think ignition and jetting even before valve clearances.It's too much coincidence that it's those two. If a valve is going to burn it'll be the number 3 cylinder all other things equal.It's about the vacuum line it's always slightly leaner after time for the line to harden and leak. Check clearances first if there are no tight valves it has to come apart....simple no amount of discusion will change it although some simple preventative maintenance needs to be learned here....motorcycle repair for dummies? Ask Santa for one.....
 
MisterCinders said:
You would have to go past the valves (i.e., pull the valve cover) to deal anything that a leak down test might reveal. While you're in the neighborhood, give those valves some love. Tickle their naughty bits with a feeler gauge. If they are coy and won't open up for you, remove their inhibitions with a sexy new shim.

That may be all it takes to get some more sweet, sweet loving out of that bike. Valve adjustments are always worth doing.
Click to expand...


Never will I think of valve adjustment the same again. One question. Zip tie or ......?:o Never mind none of my busniess. :-\\\

cg
 
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