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Old January 5th, 2019, 03:10 PM   #1
Darksik
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weird noise in 4k rpm

I changed the air filter to the motorcycle, when I opened the air box in the snorkel I had a kleenex, I took it off and cleaned it with compressed air, I installed the new air filter to the motorcycle, when I turn on the motorcycle start without problems, at the time of leaving, the motorcycle at 4000 - 4500 revolutions does not pass until it opens 3/4 the accelerator feels a "boost" and passes the revolutions again, yesterday i let it 5 minutes warm up, i accelerate the motorcycle and it was strange sound from the exhaust, as if it lacked gasoline or had a lot of air, here I attached video to tell me what could be, if I need to open more the carburetor or if you need something else, i put the old air filter and the bike still got that problem.

https://streamable.com/ig8fn

https://streamable.com/p9gmv
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Old January 6th, 2019, 06:22 AM   #2
Triple Jim
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Quote:
Originally Posted by Darksik View Post
I changed the air filter to the motorcycle, when I opened the air box in the snorkel I had a kleenex...
What do you mean?

It sounds like it's not getting enough fuel in the midrange, but that's sort of a guess.
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Old January 6th, 2019, 12:49 PM   #3
Darksik
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What do you mean?

It sounds like it's not getting enough fuel in the midrange, but that's sort of a guess.
i guess the kleenex was from outside, like dust
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Old January 6th, 2019, 02:21 PM   #4
DannoXYZ
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Check for loose connections at carbs:

- rubber tubes fully pushed onto engine
- carbs fully pushed into rubber tubes
- hose clamps tight


One troubleshooting technique is to restore everything back to previous condition when things were working. Put the Kleenex back .
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Old January 9th, 2019, 12:47 PM   #5
Darksik
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Quote:
Originally Posted by DannoXYZ View Post
Check for loose connections at carbs:

- rubber tubes fully pushed onto engine
- carbs fully pushed into rubber tubes
- hose clamps tight


One troubleshooting technique is to restore everything back to previous condition when things were working. Put the Kleenex back .
I restore everything with the old air filter and the bike still have that problem, the "klenex" i was meaning was a piece of bath paper, i don't know if maybe y move the hose that go from the air to the carb, because before open the air filter box the screw from down i can't remove because the frame block to remove the screw :/ I already move the "idle speed screw" and the bike is stil have that problem
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