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Stuck valve/O rings

  • Thread starter Thread starter ybot1966
  • Start date Start date
Y

ybot1966

Guest
i was going to change my carb intake "o" rings as my carbs are popping and idle is eratic but saw a article claiming that popping carbs may be a stuck valve, does anyone know any other symptoms of a stuck valve and how it can be unstuck without taking the head off?
 
Unstick it by riding it; otherwise it's bent or busted or the springs are knacked etc and the head will have to come off. Chances are you've got a carb problem but what bike have you got?
 
Stuck valves are extremely rare, however burned valves from idiot's not adjusting them is common.

First step toward eliminating running problems is basic maintenance. If the bike still doesn't run right you then will have a baseline from which to build.
 
The only external sign of a stuck valve would be excessive valve clearance

Do a valve adjustment and see

Popping is generally a lean mixture issue
 
hampshirehog said:
Unstick it by riding it; otherwise it's bent or busted or the springs are knacked etc and the head will have to come off. Chances are you've got a carb problem but what bike have you got?
Click to expand...

sorry pressed send before finishing 1977 GS750
 
popping could also be just a airleak, bad sync, or just too rich.

is the popping from the exhaust or is it kinda a hissy spitty ness from the carbs?
 
refeicul said:
popping could also be just a airleak, bad sync, or just too rich.

is the popping from the exhaust or is it kinda a hissy spitty ness from the carbs?
Click to expand...


Popping from the carbs, more like a phuting sound! it has K&N filters which ran fine last month, but i think the weight of the carbs may have caused an airleak in the intake O rings as the the revs stay up when the throttles used and the idle screw produces erratic results
 
ya i got that on mine awhile back.

once it was from the fuel screw too far out the other was during syncing when the butterfly was too far closed, or with the floats to high. all due to a rich mix.

the only other thing i could think of is that due to running rich like with pods there was excess carbon on the valves causing them to stick or lag up and the hissy spitty noise was the cylinder pressure.:-k

but the erratic idle has to be an air leak
 
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