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Symptoms of leaking exaust header?

  • Thread starter Thread starter c&c
  • Start date Start date
C

c&c

Guest
Before you start by saying fix the leak, I know that :)
What I want to know are the symptoms of leaking exhaust headers?

What I have read so far.:
Ticking sound
Ruff idling
Sudden up spurs.
Exhaust fumes in your face.
Impossible to properly tune your carburetors.

Is the above correct? Am I missing something?
Does it affect carb syncing?

Thank you.
 
It would have to be a pretty bad leak in order to effect your carb sync dramatically. Usually the most noticeable effect from a leaking exhaust is backfiring on deceleration. The ticking can also be pronounced. Just depends on where the leak is and how severe. Ruff idling is more of a carb or carb sync issue then a leaking exhaust. Not sure what you mean by sudden up spurs. Can you clarify?
 
Sudden spurs: At idle it will rev higher for one cycle. you might laugh but like... vrom, vrom, vrom VROM, vrom, vrom :)
Same thing when accelerating, in low revs. It's annoying in curves when you need precise throttle response.
 
c&c said:
Sudden spurs: At idle it will rev higher for one cycle. you might laugh but like... vrom, vrom, vrom VROM, vrom, vrom :)
Same thing when accelerating, in low revs. It's annoying in curves when you need precise throttle response.
Click to expand...

Those sort of symptoms sound like an air leak on the carb side not an exhaust leak.
Cracked carb boots, not properly seated carbs, airbox modifications.
 
Following, as I'm having similar issues. haven't thought to look for an exhaust leak though..
 
I used Permatex copper header gasket maker and it worked. The difference is instant. Deeper sounding exhaust. No more breathing fumes. No more ting ping. Pulls allot stronger.
It's simply awesome!

It did somewhat attenuate the hesitation and misfiring symptoms but did not fix them.
For that see my other post:
Bad spark plugs: http://www.thegsresources.com/_forum/showthread.php?232977-NGK-D8EA-Sparkplug-Ohm-Specifications
Testing coils: http://www.thegsresources.com/_forum/showthread.php?232912-How-to-test-coils
 
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just as an aside that might pertain
I changed mufflers to a pair of hand-me-downs off a parts bike- and this caused slight popping on deceleration while riding (ok just sitting and starting up)I haven't been able to tune it out with the idle air mixture ...thinking a little richer when butterfly is shutting might stop it... No "spurs" though. I'm pretty sure these mufflers are too-free flowing as they are louder too. The crossover pipe is fine.

"Spurs" is kind of a good word to describe "surging idle" or whatever!
 
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No leaks at the crush gaskets. I have this "race exhaust" where the header pips are held with springs. This is where the leaks were. The header pipes are not a perfect fit.
I'll be looking into a permanent solution after the season is over. I originally bought these because I liked the idea not having to remove the bolts from the head for oil changes etc. Just some springs and your done.
 
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