Yz450f whining noise

tasha2006
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tasha2006
2020 new rebuild Yz450f has a whining noise coming from clutch side. Everything is new from inside and out. Have taken it apart and checked everything to make sure nothing was over tighten or lose. Any suggestions to what this could be?
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Factor E
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Factor E 8/23/2020 11:39pm
8/23/2020 11:39pm
Does it get louder when rev d higher?
tasha2006
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tasha2006 8/24/2020 10:24am
8/24/2020 10:24am
Factor E wrote:
Does it get louder when rev d higher?
Yes.
Factor E
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Factor E 8/24/2020 11:31am
8/24/2020 11:31am
Oem crank bearings?
A Bearing might not be fully seated in case.
Paw Paw
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Paw Paw 8/24/2020 3:16pm
8/24/2020 3:16pm
Take a look at the cam caps in the head. They will look rough if you have an oiling issue,

Paw Paw

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tasha2006
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tasha2006 8/24/2020 3:35pm
8/24/2020 3:35pm
Factor E wrote:
Oem crank bearings?
A Bearing might not be fully seated in case.
Yes OEM.
tasha2006
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tasha2006 8/24/2020 3:37pm
8/24/2020 3:37pm
Paw Paw wrote:
Take a look at the cam caps in the head. They will look rough if you have an oiling issue,

Paw Paw
New cams. Whole complete motor. Just when we started it the first time it made the noise. Fresh oil nothing cheap to have that issue.
Bennett59
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Bennett59 8/26/2020 8:59am
8/26/2020 8:59am
Might be dumb but is oil filter in right? I had buddy put his in backwards on kx 450 had a loud whining sound
tasha2006
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tasha2006 8/26/2020 2:17pm
8/26/2020 2:17pm
Bennett59 wrote:
Might be dumb but is oil filter in right? I had buddy put his in backwards on kx 450 had a loud whining sound
No not filter
tasha2006
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tasha2006 8/26/2020 2:18pm
8/26/2020 2:18pm
Factor E wrote:
Oem crank bearings?
A Bearing might not be fully seated in case.
tasha2006 wrote:
Yes OEM.
All stock parts. If I could post a video it would be easier to explain.
tasha2006
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tasha2006 8/26/2020 2:19pm
8/26/2020 2:19pm
Factor E wrote:
Does it get louder when rev d higher?
Yes
Factor E
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Factor E 8/26/2020 2:29pm
8/26/2020 2:29pm
If it runs past a heat cycle its prob not the top end
If it stops running when gets warm, then not good
Pull cam bridge and check for no oil marks

Have seen cams off by one tooth and bike ran no issue but had whine
got louder upon revving. With cams in right time whine went away

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