question about replacing rotors

[Oss]

HDL or whatever its called now is having the labor day sale

I am told my right rotor (bike just shy of 80000 miles) is warped

What parts besides the rotor do you get when ordering the rotor

dust seals/ etc  looks like 5 or six things that may be replaced at the same time
not that much money vs the down time not riding

I will do the left and right rotor even if the left is ok  I will just keep the old one as a spare


here is the link to the fiche

http://www.hdlparts.com/fiche_section_detail.asp?section=2093138&category=Motorcycles&make=HONDA&year=2001&fveh=124341


these bolts?
Honda OEM Parts 90106-MBB-000
90106-MBB-000
Honda Rotor Bolts.



and of course 2 sets of pads
Mnfr. Part: # Honda OEM Parts 06455-MV4-405
Our Part #: HO-4636130

[old2soon]

Maybe the O rings for a caliper rebuild?? That way everything is relatively new and/or rebuilt. Just M H O. RIDE SAFE.

[art]

I just replaced both frt. rotors .I only got the rotors

[Joe Hummer]

Even,

In addition to the rotors, you will want to get the bolts that hold the rotor on.  Yeah, your current bolts are fine...but it is recommended to replace when you take the rotor off.  I believe it is 6 per side. 

Joe

[9Ball]

+1 on the new bolts...the possibility of a severe brake failure, such as a rotor separation under panic conditions, is not worth saving a few bucks.

There is lots of discussion about whether these are torque to yield bolts or just have a thread locking compound on them....I'm a believer that they are torque to yield.

You will get differing opinions for sure...

[Michvalk]

There aren't any seals or gaskets behind the rotors. Just the rotors and the bolts. If you feel the need, good time to replace the bearings. Easy to check them

[Chrisj CMA]

Yep rotors and bolts, then send the old bad ones (rotors and bolts) to me (I collect them) keeps them out of landfills for sure

[98valk]

+1 on the new bolts...the possibility of a severe brake failure, such as a rotor separation under panic conditions, is not worth saving a few bucks.

There is lots of discussion about whether these are torque to yield bolts or just have a thread locking compound on them....I'm a believer that they are torque to yield.

You will get differing opinions for sure...

bolts are not torque to yield, presently only for the most part TTY bolts are only used for automotive cylinder heads.

disk bolts can be reused as long as lock tite is used. some like red some like blue. I have used blue, over 20k miles since I had the disks off, bolts still tight no problems.
new OEM bolts have lock tite on them.

[sandy]

Ditto on not needing to replace the bolts. Honda says to replace because they preinstall locktight on these bolts. Look into using GL1800 Wing rotors. I have them on my Valk and they work perfect. They are also lighter thereby reducing unsprung weight.

[9Ball]

+1 on the new bolts...the possibility of a severe brake failure, such as a rotor separation under panic conditions, is not worth saving a few bucks.

There is lots of discussion about whether these are torque to yield bolts or just have a thread locking compound on them....I'm a believer that they are torque to yield.

You will get differing opinions for sure...

bolts are not torque to yield, presently only for the most part TTY bolts are only used for automotive cylinder heads.

disk bolts can be reused as long as lock tite is used. some like red some like blue. I have used blue, over 20k miles since I had the disks off, bolts still tight no problems.
new OEM bolts have lock tite on them.

just saying it doesn't make it true...there has been a lot of discussion about this item not only here but on many other websites.  If the issue is only that the new bolts have a locking agent applied to the threads then it I agree that it doesn't make sense to replace these each time.  I do know that these bolts are non-standard in regard to head size and shoulder for this size bolt...that may be the only difference.

I'd really like to know for sure, maybe something directly from Honda since "yes it is...no it isn't" doesn't answer the question.

[old grouch]

Oss- I need to order new rotors for mine also.  Any chance you could post the discount code?  I don't seem to be getting them in e-mail any more.  Thanks, Stan

[HayHauler]

LABOR2012

Hay
Jimmyt

[old grouch]

Thank you.  Stan   

[Cattman]

I may be wrong, but I belive the rotors for a GW are the same size and substantially cheaper. Do a search I know it's been discussed before.

[Oss]

10% Off all Orders with Merchandise Totaling Over $100

Started 8am Wednesday August 22, 2012
Ends at Midnight Eastern, Thursday September 6, 2012

The Coupon Code is LABOR2012

thanks Jimmy

[indybobm]

If you do not think that the bolts are ' torque to yield', then do a little test. Take either the rotor bolts or the bolts for the rear wheel damper plate and do the following:

1. Measure the length of the bolt with a digital caliper
2. Install the bolt, without thread lock, and torque to the stated amount.
3. Remove the bolt and measure again with the calipers.

You will find that each time, the bolt has become longer. You will also notice that the diameter of the threaded area has become thinner as the bolt stretches. Eventually, you will not be able to torque the bolt to the stated torque without the bolt failing.

I did this test on the damper plate bolts and the rear rotor bolts when I replaced the final drive on my bike.  I had some bolts stretch well over .050" over the original length. The thinning of the middle  threaded area was very noticable.

I would ALWAYS replace the bolts.

[old2soon]

I got the goldwing brake rotor #s off of our generic parts list jest fer yuks and giggles.  And i got the H D L website pulled up-again fer laffs-and the less expensive between the G W rotors and the Valkyrie rotors are the Valkyrie rotors @ $97.00 EACH. Thats $194.00 that can be put to better/other uses.  DO NOT know if they have either in stock but the price difference is remarkable.  Just a little F Y I to muddy up the waters.  RIDE SAFE.

[HayHauler]

O2S, those Valk rotors used to be over $400 per side and that's why I have the Goldwing rotors on my bike.  I may buy a spare set at that price!

Hay
Jimmyt

[hairyteeth]

While the rotors are off... centramatic wheel balancers. Then you never have to balance your front tire again. They work great for me and no ugly mess or weights.
Hairy

[old grouch]

O2S--- I just looked at the HDL website & got a price of $147.63 ??  per side, P/N 41520-MZO-003 for the right & 45220-MZO-003 for the left.  Am I doing something wrong?   

[old2soon]

O2S--- I just looked at the HDL website & got a price of $147.63 ??  per side, P/N 41520-MZO-003 for the right & 45220-MZO-003 for the left.  Am I doing something wrong?   

   Nope-i worded it wrong.  The Valkyrie rotors are $97.00 LESS each than the G W rotors.  My bad the way i worded it.  Hope this clears up the confusion.  RIDE SAFE.

[old grouch]

Thanks.  Thought I was losing what little mind I had left.

[9Ball]

If you do not think that the bolts are ' torque to yield', then do a little test. Take either the rotor bolts or the bolts for the rear wheel damper plate and do the following:

1. Measure the length of the bolt with a digital caliper
2. Install the bolt, without thread lock, and torque to the stated amount.
3. Remove the bolt and measure again with the calipers.

You will find that each time, the bolt has become longer. You will also notice that the diameter of the threaded area has become thinner as the bolt stretches. Eventually, you will not be able to torque the bolt to the stated torque without the bolt failing.

I did this test on the damper plate bolts and the rear rotor bolts when I replaced the final drive on my bike.  I had some bolts stretch well over .050" over the original length. The thinning of the middle  threaded area was very noticable.

I would ALWAYS replace the bolts.

thanks...good info.

[Ricky-D]

Elongation happens when the bolt has exceeded it tensile properties.

In other words, if you over torque a bolt it can/will stretch to a point before breaking that can leave the bolt deformed (lengthened).

Torque values are determined for bolts to not exceed their tensile properties thus, not to deform.

If you break a bolt, you have far gone past the torque values for that particular bolt. Old and used bolts do not retain their original properties at the time of manufacture.

The bolts used for attaching the brake rotors are mainly engineered for shear and the post stating about the stock bolts come with pre-applied thread locker is correct and the reason Honda says to use new bolts. For no other reason.

So you can reuse the old bolts, just apply some thread locker.

I doubt the is any way you can exceed the torque yields for the rotor bolts, this due to the fact of the small size of the allen wrench required.  Allen wrenches are not the best for applying high torque values.

***

[9Ball]

"yes they are"......"no they aren't"

Based on what?  I'd like to see something other than opinion to back up what the issue is with these bolts and why they recommend replacement each use.

Maybe we'll never truly know this mystery.... ???

[Anthony]

Surprised nowbody mentioned this earlier :
Always put new brake pads on when replacing rotors

Anthony

[Blackduck]

I go with the theory on the thread locker on the bolts, Honda says to replace the bolts on the rear wheel damper retaining plate when replacing the dampers, there is no load on that plate that would require anything special in the way of bolts. Only the thread locking compound on the bolts.
Boils down to personal preference if you wish to replace the bolts. If you do not know the history of the bike then it may pay to replace them as they may have been over torqued previously if the rotors have been off and not refitted correctly.
Would have a good look at the calipers, if one rotor has worn a lot more than the other the piston maybe sticking and not releasing fully wearing the rotor.
Cheers Steve.

[98valk]

"yes they are"......"no they aren't"

Based on what?  I'd like to see something other than opinion to back up what the issue is with these bolts and why they recommend replacement each use.

Maybe we'll never truly know this mystery.... ???

Lawyers and to make money on parts

[98valk]

http://sections.asme.org/wts/Flyers/FTI%20JG%20PP%20Presentation%20Torque%20Tension%20090419.pdf

[Ricky-D]

"yes they are"......"no they aren't"

Based on what?  I'd like to see something other than opinion to back up what the issue is with these bolts and why they recommend replacement each use.

Maybe we'll never truly know this mystery.... ???

It may remain a mystery to you, but seeking absolute answers is a wasteful and foolhardy exercise.

Good powers of observation, a willingness to accept what you see and an agreement on a reasonable explanation that encompasses all the variables is all a good mind usually needs to believe a hypothesis as accurate.

"Show me the proof" is left to those who reside in the doubters pool and refute the obvious.

***

[9Ball]

guilty as charged...and I still believe you're wtong!!

BTW, my questioning attitude and desire to know the basis for specifications comes from 34 years as a nuclear power chemist...we don't take somebody's word for something unless they can back it up with evidence...I'm sure even you might appreciate that.