07-14-2016, 10:00 PM | #1 |
Join Date: Apr 2016
Location: Australia
Posts: 89
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Engine knock sound, thoughts?
Seems like in hogging this forum so bear with me
Zong is making engine knocking sound, its a lot quieter now so this sound is very exaggerated, but still a definite knock there, She starts/idles/rides fine its when in idle you hear this , and low-medium revs Im suspecting timing? Running boosted fuel Video was piston was new fyi Last edited by b44; 07-25-2016 at 05:30 AM. |
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07-15-2016, 12:12 AM | #2 |
Join Date: Dec 2014
Location: Deerfield Beach FL
Posts: 1,410
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rpm way low
one of your adjuster nuts fell off the valve exhaust leak / |
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07-18-2016, 11:38 PM | #3 |
Join Date: Apr 2015
Posts: 192
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Try putting your hand over the exhaust and pay attention to how the noise changes. If it is exhaust leak, the sound should change.
Pull the clutch lever and see if it changes. Check the valve clearances. |
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07-25-2016, 05:29 AM | #4 |
Join Date: Apr 2016
Location: Australia
Posts: 89
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Ok this is video taken today, you can hear knock/rattle every 2-3 seconds exhaust sounds are gone its got a kind of possible tapping sounds
Appreciate the help fellas |
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07-25-2016, 11:19 AM | #5 |
Join Date: Dec 2015
Location: CO
Posts: 1,525
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I'm thinking along the lines of the other 2 folks, did you ever check the valves yet or maybe you did what everyone here has done at least once before... set the valves on the wrong stroke/T line?
It makes a really loud "Tappy Tappy Tappy" sound when you do the valves on the wrong T-line
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07-26-2016, 09:47 PM | #6 |
Join Date: Apr 2016
Location: Australia
Posts: 89
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Yes double checked valves, no change in blocking exhaust off,clutch in no change either, i raised idle speed has quieter noise still there on rev up ,think ill have to look at timing? Not sure if i should advance or retard, im thinking retard
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07-27-2016, 01:55 AM | #7 |
Join Date: May 2016
Location: Hacienda Heights, Ca
Posts: 281
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What is boosted fuel?
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07-27-2016, 09:32 AM | #8 |
Join Date: Apr 2016
Location: Australia
Posts: 89
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