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May 21st, 2014, 10:38 AM   #1
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Joined: Oct 2013
From: Finland

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I Ride: KTM 450 & 525 EXC, Husa 650, Honda ST70
Engine noise?

Anyone who has experience of the 650 egine sounding like this??

Noisy Husaberg - YouTube
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May 21st, 2014, 03:33 PM   #2
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From: Madrid

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I Ride:
Think that your noise its diferent what i had here

But just in case in real sound like that my problem it was just a bad clearance valve so i just adjust them and the noise gone.
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May 22nd, 2014, 11:38 AM   #3
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From: Finland

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I Ride: KTM 450 & 525 EXC, Husa 650, Honda ST70
hyebo, you have typhical valve noise, but this is not that! This is more a "whistling" noise, that sounds like it's coming from the waterpump/clutch/smaller bearing... Amyone???
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May 24th, 2014, 03:09 PM   #4
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Joined: Jun 2004
From: denton texas

Posts: 65
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I Ride: 2010 KTM250SX, 2001 Husaberg FC550
engine noise

My 2001 FC550, counter balance bearing (single row bearing) failed. The sound was close to yours. But I think after 2003 the counter balnace bearing was a double row bearing with none or little failures.

Just before the failure of the bearing I started to find more than normal metal chips in the oil.

So possible time for a tear down.


2001 Husaberg FC550

KTM 250SX 2010

KTM 2013SX 2013
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May 25th, 2014, 02:22 AM   #5
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Joined: May 2014
From: Bathurst

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I Ride:
Ive got a 2006 model 650 that died about four years
Ago and ive been too afraid to get the wallet out and
Start fixing it. Although i know the basics of the start
Of the problem, the nut on the primary gear came loose
Of which in turn caused the keyway to give way splitting the
Primary (pinion) gear to crack in two. It had only done 50hrs
But i am yet to find out if the valves would have flapped freely
And caused damage or if i can just patch the shaft and replace
the gear. Pull the left cover off to check, cheers!
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May 20th, 2017, 01:18 PM   #6
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Joined: May 2017
From: Finland

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I Ride: Fs550e -08

Was this (whining noise) problem solved!? Cause i Have same problem right now.

Last edited by KILLNWO; May 20th, 2017 at 01:40 PM.
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