BMW K bikes (Bricks)

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1Back to top Go down    Crank cover material on Tue Jun 07, 2016 2:46 pm

jrocker3235

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Is the K100 crank cover made of cast aluminum? Thanks.

    

2Back to top Go down    Re: Crank cover material on Tue Jun 07, 2016 3:24 pm

duck

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Aluminum alloy.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

3Back to top Go down    Re: Crank cover material on Tue Jun 07, 2016 4:17 pm

jrocker3235

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Thanks duck

    

4Back to top Go down    Re: Crank cover material on Tue Jun 07, 2016 7:18 pm

jrocker3235

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Anyone ever seen or tried to anodize these their crank or cam covers?

    

5Back to top Go down    Re: Crank cover material on Wed Jun 08, 2016 2:49 am

duck

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I've had both K75 and K100 engine covers done in "Chromex" ceramic coating. Lots of shiny goodness!





__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

6Back to top Go down    Re: Crank cover material on Wed Jun 08, 2016 8:02 am

Holister

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@jrocker3235 wrote:Anyone ever seen or tried to anodize these their crank or cam covers?
Aluminium alloy can't be anaodised


__________________________________________________
1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

7Back to top Go down    Re: Crank cover material on Wed Jun 08, 2016 9:33 am

duck

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I was curious so I just Googled "anodize aluminum alloy" and it does look like some aluminum alloys can be anodized - at least some of them. Not sure about our engine covers though.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

8Back to top Go down    Alodine on Wed Jun 08, 2016 10:42 am

kennybob

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If you want to put a protective finish and/or add some color to the surface, then consider alodining, which is the chemical application of a protective chromate conversion coating on aluminum.

http://www.eaa1000.av.org/technicl/corrosion/alodine.htm

    

9Back to top Go down    Re: Crank cover material on Wed Jun 08, 2016 11:48 am

jrocker3235

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You can definitely anodize alloys. Like you said it depends on the alloy though. Certain alloys will anodize and dye better than others. 5000 series alloys and up are good for anodizing. I wonder what alloy the K100 covers are. A google search turned up nothing. There has to be a reason you dont see more people anodizing the cam and crank covers though.

    

10Back to top Go down    Re: Crank cover material on Wed Jun 08, 2016 11:58 am

jrocker3235

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Thanks Kennybob. We use alodine at work and I am really looking at anodizing for the aesthetic aspect over the protective.

    

11Back to top Go down    Re: Crank cover material on Wed Jun 08, 2016 12:37 pm

duck

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@jrocker3235 wrote:Thanks Kennybob. We use alodine at work and I am really looking at anodizing for the aesthetic aspect over the protective.

I hope this works out for you and look forward to seeing the results.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

12Back to top Go down    Re: Crank cover material on Wed Jun 08, 2016 9:19 pm

Holister

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@jrocker3235 wrote:..... There has to be a reason you dont see more people anodizing the cam and crank covers though.
"More"?.... I've not seen any. There is a reason. Castaluminium alloy cannot be anodised. It's composition is very different to extruded aluminium and even uses a different numerical system to identify its composition. Anodising creates an oxidised coating over the surface of the aluminium. This has a cellular structure which is then sealed off in the final process preventing further oxidation. With the higher content of alloy metals such as magnesium and copper you find in cast aluminium, this cellular aluminium oxide coating cannot form properly.

The alodine process maybe different but I'm guessing the same may apply.


__________________________________________________
1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

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