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Old 04-17-2013, 12:11 PM   #1
walkingbear OP
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Info Needed .. front end swap

I know the K100 front end would fit on a R100GS. Will it fit on a R90?
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Old 04-17-2013, 12:48 PM   #2
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My understanding is, essentially, yes. It is a "straightforward" swap. If you check a site like http://www.allballsracing.com you will find the K75/K100 and the Airhead Rs use the same bearing kit.

Steering stops, gauge mounting, turn signals, etc all need attention.

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Old 04-17-2013, 01:51 PM   #3
KhaoSanMan
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I have a K100 front end on the shelf and it would be easy to measure if you need any specifics. PM me if needed.
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Old 04-17-2013, 02:23 PM   #4
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Yes.

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Old 04-18-2013, 06:42 PM   #5
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Nice Dave......

Real nice !
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Old 04-19-2013, 02:53 AM   #6
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Quote:
Originally Posted by gsd4me View Post
That's really nice, it's just fitting the spoked wheel that's the issue?
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Old 04-19-2013, 02:57 AM   #7
Plaka
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Originally Posted by chasbmw View Post
That's really nice, it's just fitting the spoked wheel that's the issue?
Fitting the blower, the fuel injection and paying for the shocks was the issue. Somebody could have bought a stone stock Ducati for what that thing cost---and the Duck would run the pants off it.

The K uses a bigger axle, so the wheel has to be able to take that---or the axle modified, which sort of misses part of the point of having the K front end---stiffness.
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Old 04-19-2013, 03:17 AM   #8
gsd4me
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Fitting the blower, the fuel injection and paying for the shocks was the issue. Somebody could have bought a stone stock Ducati for what that thing cost---and the Duck would run the pants off it.

I'm pretty sure the Ducati would not still be running almost untouched after over 20 years and 275,000 kilometres.
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Old 04-19-2013, 05:54 AM   #9
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I'm pretty sure the Ducati would not still be running almost untouched after over 20 years and 275,000 kilometres.
170877 miles on a 90S? First over pistons and a bore job at around 120,000mi. Valve job a little sooner. Transmission work and new rear splines a little later, a clutch or two (three on that thing) in there somewhere. But if you took care of the wheel, head and swing arm bearings they're still going strong but you've replaced there discs---and more than a few rear spokes I'll bet. Ya gotta pay to play and beemers will go a million miles and more, but you replace a lot of stuff along the way. granted you might replace more stuff sooner on the Duck, but it's makeing more power.
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