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radial mount brake caliper bolts?

  1. #1
    Lifer akira700's Avatar
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    radial mount brake caliper bolts?


    I know this is the wrong area for this post
    but need a quick answer.

    So I'm changing my front brake pads.

    First time on my 600RR. the manual says
    replace the caliper mounting bolts.

    Really every time you torque and untorque the bolt
    you replace them ?
    I wanna change the pads but dont want to wait for
    new bolts.

    Advise please...

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  2. #2
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    radial mount brake caliper bolts?

    Since I've observed just how fun it is trying to secure a caliper once the brake bolts have fallen off in the middle of vt....from someone with the same question - change em.

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  3. #3
    I'm mildly retarded. JeffL's Avatar
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    radial mount brake caliper bolts?

    Blue loc-tite + torque wrench, and I wouldnt worry about it.

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    I know a little about everything, and alot about nothing.

  4. #4
    Lifer akira700's Avatar
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    radial mount brake caliper bolts?

    Thanks

    I'll do it next time.
    The bolt is less than a year old and its
    the first time it was untorqued and retorqued
    since coming from the factory.

    I used a torque wrench and got it to spec.

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  5. #5
    Soul Rider Paul_E_D's Avatar
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    radial mount brake caliper bolts?

    That would be just ridiculous for a racer! Did the calipers need to come off to change the pads?

    I hope you used locktite! I would consider safety wire. I'm not sure why streetbikes aren't predrilled for wire. It just makes sense.

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    Paul_E_D


  6. #6
    Lifer akira700's Avatar
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    radial mount brake caliper bolts?

    yeah pre drilled would be nice...

    Drilling bolts is not my favorite pastime !

    I need a good vise for my press. The one
    I have has trouble holding small pieces
    especially at the odd angles that one needs to
    drill at for wiring.

    Do they make a press vise just for bolts?

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  7. #7
    Lifer union's Avatar
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    radial mount brake caliper bolts?

    how come you cant change your pads without taking the caliper off? Doesnt make much sense to me.

    The reason why they advise you to change the bolts on the brake system when you remove them is because they bolts are usually torqued down closer to their limit and doing this over and over could weaken them and then the one time you REALLY need the bolt to hold it would snap. WIll it happen? I doubt it but its possible.

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  8. #8
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    radial mount brake caliper bolts?

    Originally posted by union
    The reason why they advise you to change the bolts on the brake system when you remove them is because they bolts are usually torqued down closer to their limit and doing this over and over could weaken them and then the one time you REALLY need the bolt to hold it would snap.
    think it may have something to do with heat in some cases...but don't quote me on that.

    You really don't need more then a 9.99$ drill press vise from home depot. But if you're so inclined:

    http://www.pitposse.com/nutdrilljig.html

    For reference, this is similar to what I've used and it's worked well.

    http://cgi.ebay.com/3-Drill-Press-Gr...QQcmdZViewItem

    Edit: If you do get into wiring, Milbar makes some really nice pliers (milbar/proto/etc.)

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  9. #9
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    radial mount brake caliper bolts?

    Originally posted by JeffL
    Blue loc-tite + torque wrench, and I wouldnt worry about it.
    ..is it the blue loctite that heals stressed threads?

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  10. #10
    Lifer akira700's Avatar
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    radial mount brake caliper bolts?

    Hey strangeguy
    thanks for info...
    I'll look into it.

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  11. #11
    Soul Rider Paul_E_D's Avatar
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    radial mount brake caliper bolts?

    I have a set of aluminum soft jaws designed to hold bolts. Work great. Got it from Racetech, but they are expensive without a sponsorship!

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    Paul_E_D


  12. #12
    Fork oil in my veins.... gmdboston's Avatar
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    radial mount brake caliper bolts?

    Honda is one of the only manf. to recommend replacing the bolts. It has nothing to do with repeaterd torqueing of the bolts. The torque spec is still well with in the elastic region of the material. It's because the brake bolts come from Honda with lock tight on them. You can reuse the bolts indefinitly. Too much engineering is done by the legal dept.......

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  13. #13
    Angry Gumball RandyO's Avatar
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    radial mount brake caliper bolts?

    it the shop manual sez replace I would

    many bolts are designed as one use only, they stretch when they are torqued and loose their strength


    being a victim of having a caliper come flying off and going thru the rim @ 60mph, I can tell you it is not a desireable experience

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  14. #14
    Fork oil in my veins.... gmdboston's Avatar
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    radial mount brake caliper bolts?

    Originally posted by RandyO
    it the shop manual sez replace I would

    many bolts are designed as one use only, they stretch when they are torqued and loose their strength


    being a victim of having a caliper come flying off and going thru the rim @ 60mph, I can tell you it is not a desireable experience
    The only blots on a motorcycle that are torqued enough to not reuse them are some connecting rod bolts. They are torqued and stretched beyond the elastic region of the material and into what is called the plastic region of the material. These bolts can not be reused because they are deformed when torqued. Brake caliper bolts are not. The ONLY reason caliper bolts fall out is because they are not tight enough. Lock tiight is not requied, but is also not a bad idea. Just a drop will keep the bolt from vibrating out if you should not get enough torque on it.

    Think about it. The caliper bolts are under a shear load. This is the strongest mode for a bolt. The loads are trying to cut the bolt like a bolt cutter. There is little to no compression or tension force so there is very little acting to loosen the bolt. There is some heat expansion and contraction that will cause it lose torque, but the factory spec is more than enoughto over come this. The most common caliper bolt failure I've seen is over torqueing and stripping the caliper threads. If bolts magically back out due to vibration and heat then every bolt on the motor would fall out while you ride. Al most none of the bolts on the motor require lock tight, ever the exhaust mounting flanges which see more heat and vibration than any other bolt. Why is it that when people talk about motorcycles they ignore basic engineering practices and the laws of physics????

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  15. #15
    Fork oil in my veins.... gmdboston's Avatar
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    radial mount brake caliper bolts?

    That was not aimed at you specifically Randy, is was a general observation.

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  16. #16
    Lifer
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    radial mount brake caliper bolts?

    Randy...caliper bolt on going through your rim was one persons fault and had nothing to do with the integrity of the bolt. Everything to do with the integrity loosening it and not tightening it back up.

    Blue loctite. Bonus feature, that stuff tastes great. I mean, if they didn't want us to eat it why would they make it such a good flavor?

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    It's all water under the bridge, and we do enter the next round-robin. Am I wrong?

  17. #17
    Lifer akira700's Avatar
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    radial mount brake caliper bolts?

    Anyway my bike is back together and peachy keen. See ya all out at Louden Tuesday on it... hopefully with no flying brake parts ;-)

    I figured its was a legal liability thing.

    Well with the new pads... its amazing how much more it compresses my front forks... I need to tweak the setttings a bit to prevent the dive.

    Is excessive front end dive under braking countered by adding preload or by adding compression damping? or both?

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  18. #18
    Soul Rider Paul_E_D's Avatar
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    radial mount brake caliper bolts?

    hrrmmm.. The spring rate has the most effect on dive. The other two can help minimally in some situations, but max braking will ultimately case the same amount of dive til you change the springs. I'm sure Peter will smack me down if I'm off base

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    Paul_E_D


  19. #19
    Fork oil in my veins.... gmdboston's Avatar
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    radial mount brake caliper bolts?

    I'll be there on tues. and I'll look at you settting then.

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  20. #20
    Lifer akira700's Avatar
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    radial mount brake caliper bolts?

    Thanks Pete I'll look for ya.

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