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Buell Forum » 1125R Superbike Board » 1125R Questions & Answers » ZTL2 & Rotor's drive bushings wear... « Previous Next »

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Vagelis46
Posted on Monday, October 22, 2007 - 04:39 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I suppose the ZTL2 produces more braking forces than the ZTL.

So......


How are the rotor's drive bushings wearing with the ZTL2 ?? What is the recommended service interval ?? Can they be fliped, and then be replaced ??

Also what about the rotor's wear, at the point of contact with the drive bushings ?? Is it recommended to flip the rotor for even wear to develop before replacement ??

Will the factory consider to manufacture a rotor & wheel with 8 points of contact, instead of 6, for more endurance ??
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Jaimec
Posted on Monday, October 22, 2007 - 09:31 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'd imagine the answer to your questions have already been dealt with in the XBRR, haven't they?
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Ratbuell
Posted on Monday, October 22, 2007 - 11:53 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The reason for the six mounting points is strength - they are not mounted to the rim, but to the base of the spoke. A very important detail according to the engineers.

As for bushing wear...I don't know. I didn't notice any slop in the class bikes at Pocono, and at that time they all had in the neighborhood of 2,000 (track) miles on them.
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Dbird29
Posted on Monday, October 22, 2007 - 03:29 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Why not 7 or 9 or 13?
I think the question has the wrong premise.

Is it the right approach to suggest there is a problem with out any proof there is a problem?

Sound like the old "so do you still beat your wife?" type of gotcha question.
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M1combat
Posted on Monday, October 22, 2007 - 04:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

"I suppose the ZTL2 produces more braking forces than the ZTL. "

I would suppose that the ZTL2 is "capable" of producing more torque than the ZTL, but the actual usable braking torque is defined by CG height and location fore/aft as opposed to "available" braking torque. Unless they have significantly lowered the CG or moved it rearwards (they moved it forwards) then the amount of torque required to lift the rear wheel won't change that much. Therefor the forces acting upon the rotor hardware won't be much different (except that first time that you pull the brake lever with the same force as you would with a ZTL and get a good deal more than you expect...).

My only concern (and I'm really not that worried about it...) is that you'll be producing greater amounts of brake dust with the larger brake pads. This may jam the rotor float movement more readily. That said... I've never had a problem with that even after using an entire set of pads in less than ~1000 miles on the street (Lyndall Golds).
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Ratbuell
Posted on Monday, October 22, 2007 - 09:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

That was one nice thing I noticed about the Diamond Blue - even after a HARD day on the track, the wheels didn't look "dirty". The finish on the wheels and frame is a near-denim finish so you don't see smears like on a gloss, and the color has enough pearl in it to hide most of the dust. You could tell they had dust on them if you looked, but it wasn't obvious or "nasty" looking. NOTHING like my S2's white Marchesinis and cast iron rotors, after riding in the rain, LOL!
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