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Old 05-07-2009, 10:18 PM   #31
gefr
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That is strange.

[quote=Autostream]You may be suprised to know it can be possible to improve cooling by slowing the water flow.

This may have nothing to do with the 990 changes, but sort of related to the subject...[/quote

Very interesting info!
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Old 05-08-2009, 01:21 AM   #32
cat
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My conclusion is that I'm not changing mine. - Well, only if I change the housing as well.
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Old 03-27-2014, 03:52 AM   #33
StevenD
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Just kicking this up again!

Has anyone been round to measuring the shaft? There's a difference in impeller thickness, new one is thinner. The cutout and profile is different in the new housing. Old impeller does not fit new housing, it touches it just.

I wonder, is the new shaft also shorter?

I have just installed a new shaft and seal from a kit by KTM and had an 09 housing and impeller left so installed that too on my 07 engine. Works fine but forgot to measure the shaft and check clearance on the new impeller and cover.

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Old 03-27-2014, 04:17 AM   #34
gefr
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I recall newer shafts where longer.

There were no differences in diameter though.
Cheers.
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Old 03-27-2014, 04:53 AM   #35
StevenD
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At, found an old shaft and compared it to a new one. They are different! So keep 09+ with 09+ stuff, don't interchange unless you know what your doing!

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