1999 Front Master Cylinder - Guidance Needed - BMW Luxury Touring Community
 
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post #1 of 5 Old Mar 29th, 2020, 8:33 am Thread Starter
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1999 Front Master Cylinder - Guidance Needed

Hope everyone is doing well out there.

So after successfully installing Spiegler brake lines, getting the bleeding all done and the air out, last step was to rotate the front brake assembly on the handlebar and tighten it down, I managed to over tighten the set screw that holds the assembly in place and broke the darn piece that tightens the master cylinder to the handlebar. Ughh!

I guess I could add a rant here. It was not until I broke it that I realized it is a cast aluminum part? Why on earth would they not have used something stronger for this application? I dont think I tightened it that hard, but my guess is that given the part is now 20 years+ that it weakens over time. Anyway there is enough of the end of the tightening screw holding on that it holds snug for now, but I need to get it fixed.

Looks like there are parts available on ebay, so here is the question. Could I get a front master cylinder for a later model bike, like an 05 - 09 LT? I would guess buying a newer part might be better than an 99 or 2000 part?

Should I buy just the master cylinder or should I get a full heated grip assembly? Is one easier to install? Have not looked at how complicated it is to pull all this apart.

Thanks for any advice.

Bob
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post #2 of 5 Old Mar 29th, 2020, 9:28 am
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Re: 1999 Front Master Cylinder - Guidance Needed

Quote:
Originally Posted by RABlvmy88 View Post
Hope everyone is doing well out there.

So after successfully installing Spiegler brake lines, getting the bleeding all done and the air out, last step was to rotate the front brake assembly on the handlebar and tighten it down, I managed to over tighten the set screw that holds the assembly in place and broke the darn piece that tightens the master cylinder to the handlebar. Ughh!

I guess I could add a rant here. It was not until I broke it that I realized it is a cast aluminum part? Why on earth would they not have used something stronger for this application? I dont think I tightened it that hard, but my guess is that given the part is now 20 years+ that it weakens over time. Anyway there is enough of the end of the tightening screw holding on that it holds snug for now, but I need to get it fixed.

Looks like there are parts available on ebay, so here is the question. Could I get a front master cylinder for a later model bike, like an 05 - 09 LT? I would guess buying a newer part might be better than an 99 or 2000 part?

Should I buy just the master cylinder or should I get a full heated grip assembly? Is one easier to install? Have not looked at how complicated it is to pull all this apart.

Thanks for any advice.

Bob
Not sure what part you broke but Aluminum is common in those locations. It already weighs 833 dry. BMW uses aluminum bolts in many locations so you don't strip out threaded engine holes and such like the oil filter cover.

There is a split in part number from inception to 02/99 which is no longer available new so depending on what your mfg date is, Ebay may be the only way to go. after 01, they switched to the I-ABS servo assist system and that looks to use a different part on the 05-09 MAX fiche listed below. Not sure what happens between 01/01 and 01/05. I would go with an ebay part with a good picture you can match up to what you have.

32 72 2 352 155 HANDBRAKE LEVER UNIT, ANODIZED (to 02/99) 1.39 1 NA
32 72 7 650 773 HANDBRAKE LEVER (02/99 to 01/01) 1.36 1 $553.68

05-09 listing
32 71 7 682 278 CONTR.ASSEMBLY BRAKE,INTEGRAL,ABS, BLACK 1.34 1 $536.89

Gordon
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2001 K1200LTI – Champagne (current ride) Lazy Susan
1998 R1100RT – Never should have sold it
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post #3 of 5 Old Mar 29th, 2020, 11:05 am
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Re: 1999 Front Master Cylinder - Guidance Needed

Just to be sure we have the correct item you broke, is it the clamp circled in red?
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But lack DE, MA, RI and CT with the 2005 LT

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post #4 of 5 Old Mar 29th, 2020, 2:01 pm Thread Starter
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Re: 1999 Front Master Cylinder - Guidance Needed

Yes, thats the part I broke.

Sounds like I have to find an early part since my bike was manufactured 11/98.
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post #5 of 5 Old Mar 29th, 2020, 4:35 pm Thread Starter
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Re: 1999 Front Master Cylinder - Guidance Needed

Any tips for disassembling the front brake master cylinder assembly and grip assembly? Have not attempted this before.
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