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Buell Forum » XBoard » Buell XBoard Archives » Archive through July 17, 2006 » Help! Got a pitbull, Now I think I found a problem! « Previous Next »

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Barker
Posted on Saturday, July 15, 2006 - 06:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Got a Pitbull today lifted up the rear end and spun the wheel around. I noticed the rear caliper wobbles back and forth. Is the normal? Do I have a warped rear rotor? Bad wheel bearings? The caliper appears to be rubber mounted and kinda floats around the rotor. I dont notice and sounds and from just me looking at it it does not look like the whole wheel is wobbling.
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Barker
Posted on Saturday, July 15, 2006 - 06:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

FYI

2003 XB9R 15k miles
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Diablobrian
Posted on Saturday, July 15, 2006 - 06:57 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

The caliper floats on 2 pins. I'd say your rear rotor is probably bent.

Use the swingarm as a reference point and check rotor that way instead.
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Aeroe
Posted on Saturday, July 15, 2006 - 07:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Mine rotor's bent too...is this a "common" problem?
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Diablobrian
Posted on Saturday, July 15, 2006 - 07:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Not that I'm aware of. It could get bent during a tire change.
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Skyguy
Posted on Saturday, July 15, 2006 - 07:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

My rear rotor warped as well. I still have no idea how. It had been quite awhile since the last tire change. It got way hot o the freeay and discolored my rear brake mount.

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Ride365
Posted on Saturday, July 15, 2006 - 08:50 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

My bike is bent to sh** and it still rides like a dream, WTF! Ya i know! It's a miracle!
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Diablobrian
Posted on Saturday, July 15, 2006 - 09:21 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Ride365, Buells have developed a remarkable reputation for being a rugged machine in regards to crashes.
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Slaughter
Posted on Saturday, July 15, 2006 - 09:24 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

How much rear brake are you actually using?

Also, warpage seems to occur mostly when stopping with a hot rotor and keeping the brake on.

The rear brake should hardly be used compared to the front.
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Diablobrian
Posted on Saturday, July 15, 2006 - 09:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Slaughter is right on that
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Aeroe
Posted on Saturday, July 15, 2006 - 09:35 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

The rear brake should hardly be used compared to the front.

Per the MSF handbook, "Use both brakes every time you slow or stop."
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Diablobrian
Posted on Saturday, July 15, 2006 - 10:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Ahh, but the degree to which they are used on a sporting motorcycle is different than
they can anticipate in a textbook for all types of riders.

On a Buell in particular once the weight begins to transfer forward on a stop the
rear brake is all but useless. There is almost no weight on the rear wheel. This
is because of both the even weight balance, and the very short wheelbase.

Nothing of the sort happens on the cruisers that are so popular these days.

That's why many cruiser riders have a fear of the front brake and tout the safety of
using the rear brake exclusively, while sport riders will tell you the exact opposite.

To split the difference MSF says to use both. It's a nice compromise: )
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Eboos
Posted on Saturday, July 15, 2006 - 10:13 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

When I took my MSF course, the instructors seemed shocked by my M2's stopping ability while only using 2 fingers on the front brake (they wanted me to use 4). The course was at Sheldons HD, I guess they were used to cruiser types.
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Buellfirebolt31
Posted on Saturday, July 15, 2006 - 10:53 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Hence the tremendous stoppies these crazy acrobatic stunt guys do....i on the other habd don't have the balls to try it..i also can ride a peg wheelie...uhmm
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Slaughter
Posted on Saturday, July 15, 2006 - 11:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I have a hard time believing the rear rotor is warping unless it's dragging or being used as a primary means of stopping.
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New12r
Posted on Sunday, July 16, 2006 - 01:03 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Mine was warped, and another buddies warped as well. My front rotor warped too, but that was from stoppies!
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Barker
Posted on Sunday, July 16, 2006 - 12:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Should it be replaced? Is it going to cause other problems failures?
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Barker
Posted on Monday, July 17, 2006 - 10:02 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Now that I think about it. I do use alot of rear breaking when I decel. It seems to stop the bike better than using all front brake. Maybe I have warped it from heavy use. If yall suggest use all front and little/no rear then a warped rotor might not be that bad.

Should I replace the rotor?
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Dbird29
Posted on Monday, July 17, 2006 - 10:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

If it's warped it will push the caliper pistons away from the disc and cause poor/non-existent braking performance.
When you really need the rear brake it might not be able to answer the calling. Just bite the bullet and replace it.
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