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Author Topic: Bobbins for ABS vs Non-ABS  (Read 3526 times)

Offline AtLarge

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Bobbins for ABS vs Non-ABS
« on: June 27, 2020, 06:54:19 PM »
I need to get rid of the slop in my front rotors.  I was about to order the replacement washers, roll pins, and lock rings for my1994  K1100RS with ABS.  However, when I look at the diagram 34_0649 - FRONT WHEEL BRAKE, ABS fiche for the ABS it says 24, 18, and 24 but, no mention of the 6.  When I look at it for the non-ABS it shows the 6 extra Roller with snap ring.  Don't I need all 4 components?

https://shop.maxbmw.com/fiche/DiagramsMain.aspx?vid=51713&vin=6496272

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  • 1994 K1100RS
1973 Honda CL70-K3, 1975 Kawasaki 350 F9-C, 1994 BMW K1100RS, 2023 Honda CRF300L Rally ABS

Offline Scott_

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Re: Bobbins for ABS vs Non-ABS
« Reply #1 on: June 28, 2020, 06:16:43 AM »
I'd say that Yes, you need the 6 rollers with springs.
Don't let the pictures confuse you. If you look close the "abs" picture also doesn't show any brake caliper or hoses.... yet I'm pretty sure your bike has them.
It's not unlike the wiring diagrams, they have the base, then they have 'addendum' drawings for the added options.
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Offline Laitch

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Re: Bobbins for ABS vs Non-ABS
« Reply #2 on: June 28, 2020, 07:47:39 AM »
It was also an editorial and proofreading failure to reconcile the parts quantities in the parts price list for the ABS rotor so the number 18 wouldn't be hanging out alone in a dual assembly comprised of 24 holes. There are plenty of examples of these glitches throughout the fiche and everywhere else in deadline-driven publishing. Somehow it mostly works out ok.  :laughing4-giggles:
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Offline The Mighty Gryphon

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Re: Bobbins for ABS vs Non-ABS
« Reply #3 on: June 28, 2020, 08:40:10 AM »
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline AtLarge

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Re: Bobbins for ABS vs Non-ABS
« Reply #4 on: June 28, 2020, 01:31:24 PM »
Glad I did a reality check.  Thank you Guys.   112350

Gryph, I did see that website from my research.  Would be a huge cost savings as Max and Bob wants about $250 for a complete set on both sides.  The bummer is Boxer Upgrades is in Romania and with everything going on in the world I don't know that I want to take that long.
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  • IA
  • 1994 K1100RS
1973 Honda CL70-K3, 1975 Kawasaki 350 F9-C, 1994 BMW K1100RS, 2023 Honda CRF300L Rally ABS

Offline Laitch

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Re: Bobbins for ABS vs Non-ABS
« Reply #5 on: June 28, 2020, 02:02:31 PM »
Boxer Upgrades price is based on replacing only the roll pins; washers and clips are reused. If you go that route, it drops your MAX price to ~$130.00. The rollers (roll pins with snap rings) are an anti-rattle measure. If you replace those with the plain roll pins, you'll drop the price to ~$105.00. What's wrong with rattling? It's a motorcycle, fer fecksake!
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Offline The Mighty Gryphon

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Re: Bobbins for ABS vs Non-ABS
« Reply #6 on: June 28, 2020, 05:25:11 PM »
Those hardened rotors make a real racket when they rattle around.  Sort of like dragging a couple of cowbells under the bike or a very bad set of bells on a team of horses.  The noise comes up through the fairing and the bottom of your helmet.  Don't ask me how I know this. 

If you are going to let them rattle, why bother replacing the bobbins?
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline Laitch

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Re: Bobbins for ABS vs Non-ABS
« Reply #7 on: June 28, 2020, 05:36:42 PM »
Quote from: The Mighty Gryphon on June 28, 2020, 05:25:11 PM
If you are going to let them rattle, why bother replacing the bobbins?
To stop axial rotation which affects efficient braking. Rattling bobbins save lives!
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  • Along the Ridley in Vermont.
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Offline AtLarge

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Re: Bobbins for ABS vs Non-ABS
« Reply #8 on: June 30, 2020, 08:33:52 PM »
Oh boy.  Me thinks new bobbins and roll pins are not going to get rid of the clip clop of tiny clydesdales.   177381




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  • IA
  • 1994 K1100RS
1973 Honda CL70-K3, 1975 Kawasaki 350 F9-C, 1994 BMW K1100RS, 2023 Honda CRF300L Rally ABS
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