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June 23rd, 2019, 08:25 PM   #1
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I Ride: 2010 FE390
2009 to 2012 FE390 Frankenburgs

Anybody played around with swapping FE/FX450 parts into a FE390? FX/FE cam?

Just curious.
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June 27th, 2019, 03:35 PM   #2
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I Ride: 8 Berg’s 2005-2011 2 Husky’s 1986&7 2009 Buell & 2006 Ducati
I have 390FE with a 450 Head I’m told by the previous owner I also have a stock 390FE. As far as I can tell no difference. Both good motors

Last edited by Rainerio; June 27th, 2019 at 08:10 PM.
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June 27th, 2019, 03:57 PM   #3
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Interesting

How would you describe the power of the 390//450 compared to the 390?
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June 27th, 2019, 04:25 PM   #4
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I Ride: FE570,FS570,450/520XCF SM, SV1000, NC700
the parts fiche shows the head as the same part number for all of the 70 degree bikes, which surprised me.
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June 27th, 2019, 07:14 PM   #5
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Cams

Originally Posted by Junkie View Post
the parts fiche shows the head as the same part number for all of the 70 degree bikes, which surprised me.
Check out the camshaft. The 390 and 450's have a different part number. I have not seen them side by side, though.

If I recall, the FX450 and FE450 also use the same camshaft part number. Any differences in performance there might be just EFI tuning.
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June 27th, 2019, 11:51 PM   #6
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There is a minor difference between the cams. 570 have 10 degrees more exhaust duration (according to Jens at the factory), minor difference in lift but hardly worth mentioning.
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