Confusion-Help
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Club Member
Joined: Oct 2006
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From: North East
Confusion-Help
I recently had new tires installed on my 2007 Ultra. While the front tire appears to be correctly installed relative to rotational direction I'm not sure the brake disks are correctly oriented. On page 2-11 of the 2007 Service Manual there is a chart referencing the correct and incorrect installation/orientation of the break discs. The chart indicates the Left side brake disc should be stamped P/N 44136-00 RIGHT and the Right side brake disc stamped P/N 44156-00 LEFT. Referencing direction of wheel roation, bulb shaped end of slot is LEADING. 3 questions:
1. When the manual references LEFT and RIGHT it's my understanding that would be LEFT and RIGHT while sitting on the bike not standing in front of it. Correct?
2. What's the potential downside to having the brake discs reversed? Any symptoms I should be noticing?
3.The tire has an arrow which indicates the correct orientation relative to rotation. The manual specifies the correct orientation for the brake discs. Is there a correct and incorrect direction of rotation for the wheel itself?
Any information you can supply will be greatly appreciated. Like most I'm attempting to minimize the level of confusion in my day to day life. This could be a big step in the right direction.
1. When the manual references LEFT and RIGHT it's my understanding that would be LEFT and RIGHT while sitting on the bike not standing in front of it. Correct?
2. What's the potential downside to having the brake discs reversed? Any symptoms I should be noticing?
3.The tire has an arrow which indicates the correct orientation relative to rotation. The manual specifies the correct orientation for the brake discs. Is there a correct and incorrect direction of rotation for the wheel itself?
Any information you can supply will be greatly appreciated. Like most I'm attempting to minimize the level of confusion in my day to day life. This could be a big step in the right direction.
Road Warrior
Joined: Jun 2008
Posts: 1,437
Likes: 80
From: currently an Okie
Never heard that one before
I recently had new tires installed on my 2007 Ultra. While the front tire appears to be correctly installed relative to rotational direction I'm not sure the brake disks are correctly oriented. On page 2-11 of the 2007 Service Manual there is a chart referencing the correct and incorrect installation/orientation of the break discs. The chart indicates the Left side brake disc should be stamped P/N 44136-00 RIGHT and the Right side brake disc stamped P/N 44156-00 LEFT. Referencing direction of wheel roation, bulb shaped end of slot is LEADING. 3 questions:
1. When the manual references LEFT and RIGHT it's my understanding that would be LEFT and RIGHT while sitting on the bike not standing in front of it. Correct?
2. What's the potential downside to having the brake discs reversed? Any symptoms I should be noticing?
3.The tire has an arrow which indicates the correct orientation relative to rotation. The manual specifies the correct orientation for the brake discs. Is there a correct and incorrect direction of rotation for the wheel itself?
Any information you can supply will be greatly appreciated. Like most I'm attempting to minimize the level of confusion in my day to day life. This could be a big step in the right direction.
1. When the manual references LEFT and RIGHT it's my understanding that would be LEFT and RIGHT while sitting on the bike not standing in front of it. Correct?
2. What's the potential downside to having the brake discs reversed? Any symptoms I should be noticing?
3.The tire has an arrow which indicates the correct orientation relative to rotation. The manual specifies the correct orientation for the brake discs. Is there a correct and incorrect direction of rotation for the wheel itself?
Any information you can supply will be greatly appreciated. Like most I'm attempting to minimize the level of confusion in my day to day life. This could be a big step in the right direction.
Who is the genius that thought of stamping the left rotor "right" and the right rotor "left"? That's some crazy shift there.
My 13 just has a L and R on them. I put the one with the L on the left and the one with the R on the right. After reading your post, I pulled out the manual and my service manual never once mentions the rotor. I did find a picture that showed how to tuck the ABS sensor up against the lower leg and it showed the rotors in the same orientation mine are in.
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I'm sure there is an explanation that made sense at some time to someone. There always is however in this case it's got to be quite a story.
Road Master
Joined: Jan 2013
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From: Virginia
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Joined: Oct 2006
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From: North East
The drawing in the parts manual shows just the opposite. P/N44136-00 on the right. P/N 44156 on the left. A reference is made to Service Bulletin 1192. Anybody know what that service bulletin includes?
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Club Member
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From: North East
M-1192A SWAPPING AND ALIGNING FIXED DUAL DISCS
July 17, 2006
Purpose
It has recently been determined that swapping and aligning the front brake discs on motorcycles having fixed dual disc brakes can significantly reduce brake squeal.
Therefore, effective June 26, 2006, the front brake discs willbe swapped and aligned on all production motorcycles having fixed dual disc brakes. The running change moves theformer left side brake disc stamped P/N 44156-00 LEFT to the right side of the hub, and the former right side brake disc stamped P/N 44136-00 RIGHT to the left side of the hub. The vent holes are then aligned before the discs are fastened to the hub.
Also, in the interest of promoting customer satisfaction, Harley-Davidson will swap and align the front brake discs on affected motorcycles under warranty, but only when responding to customer complaints of excessive brake squeal.
Motorcycles Affected
All 2000-2006 model motorcycles, as well as those 2007 models built before June 26, 2006, having fixed dual disc brakes that exhibit excessive front brake squeal.
Bottom line.....looks like my front wheel and brake discs are properly oriented and installed. Good news.
Now back to working on world peace........
