#4 no worky

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Dirty Dave
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#4 no worky

Post #1 by Dirty Dave » Fri Jul 19, 2019 4:27 pm

Got my 79 working (kinda) after being dead for 26 months.

Had to replace the stator & rotor. Thanks for the link to Wingovations. Never knew about the little
spring valves on the top of the float needles (all seized). Replaced those and went though
the carbs cleaning and replacing worn O-rings etc.

My #4 cylinder has gas in the float bowl and spark but isn't firing.

Any ideas? I'm never gonna be a wizz at this. I get beaten to a pulp every time.

Guess I just have to pull #4 carb apart and look for obvious malfunctions.

:IDTS:
1978/9 GL1000
1997 Honda Valkyrie
2018 Kawasaki Z900 RS

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pidjones
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Re: #4 no worky

Post #2 by pidjones » Fri Jul 19, 2019 5:45 pm

Hey, 3 out of 4 ain't bad! Keep at it, they will eventually reveal what the problem is and you'll be down the road. Make sure you have compression, make sure the choke and throttle butterflys are working. Check the fuel level - has to be high enough for the jets to suck it in, and the air passages have to be free-flowing to make it work.
"Love 'em all.... let God sort 'em out!"
2006 GL1800 - the Black Pearl
1979 GL1000 project - to be restored
1978 GL1000 with '75 engine - the Hunley
Ex '79 CB750F rat bike - the Rocket - SOLD!
Ex '86 SEi
Ex '77 GL1000
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ericheath
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Re: #4 no worky

Post #3 by ericheath » Fri Jul 19, 2019 5:49 pm

Does #4 have compression? Probably holding your thumb over the spark plug hole will tell you enough as to whether it will fire or not. A compression tester is better.

Next, if you haven’t done it would be a valve adjust on a cold engine. A sticking valve would keep it from firing.

Knock those off the list before pulling the carbs.
Whatever I suggest here should be given ample time for a moderator to delicately correct. I apologize in advance.
77 WING, 1200 engine with 77 heads, cams, gl1100 foot pegs, Magna V65 front end, 764A carbs, [-gone Suzuki M109 monoshock--, replaced with gl1100 shocks] gl 1200 swing arm, gl1500 final drive, wheel and rear brakes Valkyrie seat, Meanstreak tank, Sportster pipes, Power Arc ignition off crank.
77 Wing. black
83 Wing, in pieces
"Continuing education is important even if the subject matter is fairly useless (as in this case)."---Greg Foresi

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tlbranth
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Re: #4 no worky

Post #4 by tlbranth » Fri Jul 19, 2019 8:43 pm

Do what Eric said. If things look OK, disconnect all plug wires, remove #4 plug and put a few drops of gas in the hole. Replace the plug and with only #4 plug wire connected and #3 plug wire grounded, try to start. If it fires up then dies you have a carb problem with #4.
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1999 GL1500 SE
2002 Honda VT750 "ACE"
1975 GL1000
1970 CB750

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ericheath
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Re: #4 no worky

Post #5 by ericheath » Fri Jul 19, 2019 8:59 pm

:2thumbs :2thumbs :2thumbs
Whatever I suggest here should be given ample time for a moderator to delicately correct. I apologize in advance.
77 WING, 1200 engine with 77 heads, cams, gl1100 foot pegs, Magna V65 front end, 764A carbs, [-gone Suzuki M109 monoshock--, replaced with gl1100 shocks] gl 1200 swing arm, gl1500 final drive, wheel and rear brakes Valkyrie seat, Meanstreak tank, Sportster pipes, Power Arc ignition off crank.
77 Wing. black
83 Wing, in pieces
"Continuing education is important even if the subject matter is fairly useless (as in this case)."---Greg Foresi

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Dirty Dave
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Re: #4 no worky

Post #6 by Dirty Dave » Fri Jul 19, 2019 10:04 pm

Once again, thank you.

I'm on the case ...
1978/9 GL1000
1997 Honda Valkyrie
2018 Kawasaki Z900 RS


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