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idling on choke

  • Thread starter Thread starter catbed
  • Start date Start date
that fixed it along with adjusting the mixture screws. she screams now and no hesitation on the throttle. post a vid in a few days. #2 cylinder fires now, just had to warm up longer. carb probably helped a bit.
 
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great news :-D
catbed said:
that fixed it along with adjusting the mixture screws. she screams now and no hesitation on the throttle. post a vid in a few days. #2 cylinder fires now, just had to warm up longer. carb probably helped a bit.
Click to expand...
 
i still think theres something wrong with # 2 carburetor. i think a passage may be plugged still. heres the spark plug.
2149004925_26ca90df3c.jpg
 
May want to do a compression test on #2. That plug dosent look like its seen much combustion.
 
catbed said:
i still think theres something wrong with # 2 carburetor. i think a passage may be plugged still.
Click to expand...
First of all, let's make sure we're numbering the cylinders correctly: #1 is on your clutch hand side, #4 is on your throttle hand side. 8-[

So, if that is, indeed, your #2 plug, a prime suspect is the vacuum diaphragm in the petcock.
If that leaks, it allows fuel down the vacuum line, which will enrichen the mixture for that one cylinder.


.
 
i am numbering the cylinders right and i dont think the petcock is leaking because i got it new in october. the number 2 header gets hot after the bike runs for a bit.
 
catbed said:
i am numbering the cylinders right and i dont think the petcock is leaking because i got it new in october. the number 2 header gets hot after the bike runs for a bit.
Click to expand...

Great to hear it's running better. I still think that your #2 pilot circuit needs further investigation!!
Have a Happy New Year.:)
 
i cleaned the pilot circuit again but it still doesnt fire right away. after it warms up for a bit, if i adjust the mixture screw for number 2 the idle speed moves with the screw. i cant find my compression checker right now, but once i get it registered, ill ride it to a mechanic and see if he can tune the mixture and check the compression. its been ridden for 8k miles so could the valves have worn that much?
 
catbed said:
its been ridden for 8k miles so could the valves have worn that much?
Click to expand...
i doubt the the valves would go off after that milage to cause a major problem provided they had been correctly adjusted (so, yes, you do need to check them)
check the compression and if nr 2 is a lot lower then the other cylinders that'd be a good indication of where your problem is
 
actually, just remembred, i had the exact same problem with one of my bikes, where one cylinder would fire properly only with the engine warmed - it turned out to be a burnt valve
 
just got a new compression checker and all of the cylinders are at about 145 psi. well except number 3 which doesnt have any. i was greeted by knocking when i tried to start and ticking when idling. its a stuck valve. now i have a better excuse to do a valve check.

would a burnt valve have compression?
 
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i was talking about the #2 cylinder, so it doesnt have a burnt valve. the number 3 cylinder im 99 percent sure it has a stuck valve. im goin to take the valve cover off and check the clearances.
 
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