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Author Topic: 1997 BMW F650ST to F650R: Enduro Hellride Conversion  (Read 9626 times)

Online irk miller

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Re: 1997 BMW F650 El Diablo Hellride
« Reply #80 on: Jan 28, 2018, 19:32:04 »
Final step for the carbs- cable and filters...




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Offline JustinLonghorn

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Re: 1997 BMW F650 El Diablo Hellride
« Reply #81 on: Jan 28, 2018, 19:33:58 »
Tidy.
I'm going to eat your brains and gain your knowledge.

Into The Sunset, CB750 build

TT500 the Animal

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Re: 1997 BMW F650 El Diablo Hellride
« Reply #82 on: Jan 28, 2018, 19:45:49 »
Progress shot:




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Offline Maritime

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Re: 1997 BMW F650 El Diablo Hellride
« Reply #83 on: Jan 28, 2018, 20:53:34 »
Excellent. This thing rocks.
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
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Offline The Jimbonaut

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Re: 1997 BMW F650 El Diablo Hellride
« Reply #84 on: Jan 29, 2018, 10:32:53 »
Great looking bike man, and really impressive fabrication skills - very inspiring.  I gotta get me more some more skills...

I love the look of the raw metal tank - I did the same on my Honda build and I'm thinking on doing the same on my KLR too.  I prepped the CB tank to within an inch of its life and took every precaution I could against rust but after a few months little "hairs" of it appeared under the 2K clear.  The only thing I didn't do was really heat the tank up before the clear to evaporate any moisture in the steel.  Do you have any tips on how to prevent rust?
"I'm telling you Donnie, nuthin' but nuthin' but right"

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Re: 1997 BMW F650 El Diablo Hellride
« Reply #85 on: Jan 29, 2018, 10:35:55 »
Do you have any tips on how to prevent rust?
Give it a bath in a phosphoric acid and alcohol solution.  You can spray it or seal the tank up and bath it.  The acid produces sort of a protective layer that can last for months or even years until water hits it.  If you're just trying to eliminate flash rusting before clear coat, that'll do it. 

Offline The Jimbonaut

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Re: 1997 BMW F650 El Diablo Hellride
« Reply #86 on: Jan 29, 2018, 10:40:38 »
Thanks man, I'll try that.  It's no so much flash rust however - when I cleared the CB tank it was absolutely rust free.  It was only after several months that small "hairs" of rust started to appear under the clear.  I've been told that's caused by moisture in the steel slowly rusting the metal from under the clear.  It doesn't look bad by any means, but, you know - rust.
"I'm telling you Donnie, nuthin' but nuthin' but right"

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Re: 1997 BMW F650 El Diablo Hellride
« Reply #87 on: Jan 29, 2018, 10:50:30 »
Yeah, I imagine the clear is not an impenetrable surface.  I fully plan to paint this tank.  The look of bare metal can be nice, but I don't expect it to be long standing. 

Offline The Jimbonaut

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Re: 1997 BMW F650 El Diablo Hellride
« Reply #88 on: Jan 29, 2018, 10:53:13 »
Ah, gotcha
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Offline canyoncarver

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Re: 1997 BMW F650 El Diablo Hellride
« Reply #89 on: Jan 29, 2018, 12:34:12 »
Yeah, I imagine the clear is not an impenetrable surface.  I fully plan to paint this tank.  The look of bare metal can be nice, but I don't expect it to be long standing.

Sounds about right.  I did Eastwood Clear over my chop tins and they've held up pretty well over about 4 years but there is definitely a bit of oxidation under it these days.  Looks good on the chop but I do think your 650 would look better with paint.
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YZF750/1000R The Fly
KZ 750 Twin
ZRX 1100
KZ400 The Rabbit
65 Norton, My damn Shovelhead chop, and an 86' FXR
more YZF750R's, the KZ's, a Zephyr750...and the unfinished 75' CB550 cafe.
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