Noisy FE650, Tell me it's typical

jdfowler0 · Apr 29, 2015

So I've got an 2006 FE650E. It's been pretty nosey since I got it last fall. Has 200hrs on the clock. I know they're a noisy motor, but this is a bit noisier than my RFS KTM.

I just installed Taffy's Dual Valve Spring Kit, along with a new cam chain and tensioner. Figured that would have helped quiet it down, but it seems to be the lower right side thats making all the racket. Tell me what you think.

https://www.youtube.com/watch?v=s8qhBtXEeKI&spfreload=10

plumbbob · Apr 30, 2015

Couldn't tell much from the video, if anything when you were on the right hand side it sounded more like a loose bolt on the sump guard or similar.

Try pinpointing the sound by listening through a bit of tube or by putting one end of a large screwdriver to the cases and the other to your ear.
Might sound daft but when you get to the source of the noise you'll hear the difference.

Carl.

hyebo · Apr 30, 2015

From what you can hear in the video that is the typical noise in a husaberg. I cant notice any weird noise like bad valve clearance, or cam chain tesioner... I think that noise you can hear in the video its normal.

feukfeuk · Apr 30, 2015

Mine has a similar sound except its a bit "softer", it sounds like small sprockets rattling around on the lower left side, a local mechanic told me it is usual for these bikes.

I actually tore mine apart a few days ago and everything looked perfectly fine so I guess the mechanic was right.

bushmechanic · Apr 30, 2015

the "typical" Husaberg noise occurs because the cam chain is not driven from a sprocket mounted directly on the crank

our cam chain drive sprocket is mounted on an intermediate shaft which is driven by the clutch basket

so there are 2 sets of gears to go through with some slack and fluctuating loads on the cam chain (both pushing and pulling) at idle due to the cam/valve springs make the gears clatter together

ORANGEBERG · May 28, 2015

feukfeuk said:
Mine has a similar sound except its a bit "softer", it sounds like small sprockets rattling around on the lower left side, a local mechanic told me it is usual for these bikes.

I actually tore mine apart a few days ago and everything looked perfectly fine so I guess the mechanic was right.

Check the primary drive nut they can come loose and make a noise then the gear splits in half and wrecks the keyway on the crank.
Cheers ORANGEBERG

zaga · May 28, 2015

bushmechanic said:
the "typical" Husaberg noise occurs because the cam chain is not driven from a sprocket mounted directly on the crank

our cam chain drive sprocket is mounted on an intermediate shaft which is driven by the clutch basket

so there are 2 sets of gears to go through with some slack and fluctuating loads on the cam chain (both pushing and pulling) at idle due to the cam/valve springs make the gears clatter together

What is my engine doing here ??

HeimirBardason · Jun 4, 2015

Bushmechanic.
Any idea why Mr. Gustavson and his friends designed it this way ??

>the "typical" Husaberg noise occurs because the cam chain is not driven from a sprocket mounted directly on the crank <

Heimir Bardason

jmscrttndn · Jun 4, 2015

I suppose they could have tied the cam chain into the crankshaft... but then where would the balancer go? Also, they would have to move the water pump if they got rid of the intermediate shaft. Maybe that would have solved the ****** WP seal issue...

Also, my bike is loud immediately after doing a rebuild... so it's natural. Likely, as said above, it has a lot to do with the slack-tension-slack in the came chain during idle.

HeimirBardason said:
Bushmechanic.
Any idea why Mr. Gustavson and his friends designed it this way ??

>the "typical" Husaberg noise occurs because the cam chain is not driven from a sprocket mounted directly on the crank <

Heimir Bardason

WArdogG · Jun 4, 2015

When the cam chain wears the cam timing changes slightly, so having the cam chain as short as possible could reduce the effects a bit.

bushmechanic · Jun 5, 2015

HeimirBardason said:
Bushmechanic.
Any idea why Mr. Gustavson and his friends designed it this way ??

>the "typical" Husaberg noise occurs because the cam chain is not driven from a sprocket mounted directly on the crank <

Heimir Bardason

i think it is out of necessity more than anything else

like james wrote the intermediate shaft is needed to drive the balancer since it runs on the crank but in opposite direction

then the whole intermediate shaft unit was in the way of a conventional crank driven chain so they ran the chain off the intermediate shaft

HeimirBardason · Jun 7, 2015

Thanks for taking the time to answer ,Bushmecanic.

I have sometimes wondered if the balancer driven on the crankshaft in the opposite direction is a good Swedish brainstorm or not ?
My old 2001 FC 550 feels light but if it´s due to this mecanical feature or that the bike is 110 kg (with no fuel) I sincerely don´t know.

Best,
eimir Bardason

bushmechanic · Jun 7, 2015

hi Heimir

i removed my balancer unit and then added weight to the crank which should make the bike handle different ..... I couldn't notice any real difference but there was a week between tests. I could probably have noticed a difference if the test was 30 seconds apart.

there are some sumo test results posted up here somewhere where the riders preferred bike handling with the balancer installed in blind tests.

my thoughts are that the balancer is itself so tiny that it is very easy to reduce the mass moment of intertia of the crank by a lot more than the balancer unit does.

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Noisy FE650, Tell me it's typical

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