Brake Caliper Bolts

[RH_SCOTLAND]

Away from home at the moment, so cant pop out and check....

What size are the front caliper bolts?

Going to look into replacing mine as they are corroded.

Cheers

 

[Dogdaze]

I'm going to ask the question, what difference what the size is? You're planning on replacing with the spec'd part right? I know they do titanium versions if that's what you are after, but OEM have a 'hollow' head. BTW 14mm, try Boatsnet yamaha (US) if direct replacement and they ship abroad, I bought a set and had them shipped to Switzerland, still cheaper for the set inc shipping than just buying a single unit here ::010::

 

[RH_SCOTLAND]

Why do I wish to know the size?

So I can look at titanium and stainless from suppliers other than those on Ebay. I wont be buying Yamaha OEM ones that's for sure. Poor quality finish on my 2012.

 

[greenwall]

Yeah, I know what you mean. I hate the crappy finish on OEM bolts that corrode from day one. Especially where I live, on the coast. For my Triumph 800 I just went to Bike Bandit and they give you the size and type of bolt, washer, etc. I was then able to order a replacement. For my ST they only tell you what kind. Such as Flanged, RH, etc. Not the size. Makes everything a bit more of a pain.

 

[RH_SCOTLAND]

Did most of the bolts on my Aprilia, but the online parts catalogue listed all the sizes. Handy. But cant find similar for the XT online. I'll keep looking though.

The rear clipper bolts will be harder to source I think.

Going to do the disc bolts too. Start with the calipers and discs and see where it goes from here.

 

[OldRider]

They're 10mm 1.25 pitch 30mm long. That's 10x1.25x30.

 

[dietDrThunder]

I bought allen head replacements from my local Fastenal for a couple of bucks. Much easier to work with, and corrosion-free as well.

 

[yoyo]

My 2016 bike isn't looking great already, it's in having it's 6k service and there are a couple of bits that'll get changed due to rust which is crap as it had minimal use in the winter. I think I'll future proof it and start looking at swapping out fastners rather than complaining to the dealer and have them replace them with the same rubbish ones.

 

[hobdayd]

You may have noticed from my previous postings that I have a real issue with Aftermarket parts. Yamaha and all other vehicle OEM's take a tremendous amount of care in the selection of materials, suppliers, processes and finishes to ensure that their components meet the performance requirements associated with that specific part of the system. They test, test and test again to ensure safety. Brakes are a safety critical component. You need them to perform as designed that once in your life when you need to do a .7g plus stop!

I was a development engineer and then program manager working on new disk brake systems for the OEM's for 28 years. Bolts gave me some of my biggest challenges. Bolt manufacturing to a very high quality and reliability is challenging - even for Tier 1 suppliers to the industry.

Would I want to change the bolt material away from the specified material selected carefully over many cumulative years of testing by the OEM and their tier 1 supplier to a different material from a supplier that implements what quality systems, with materials supplied from where, on a safety critical system that sees tremendous forces and temperatures up to 700 degrees C+!

I am just saying...

 

[Dogdaze]

I would agree with hobdayd, yes they corrode (perhaps not as bad as BMW!!! ) but will the cause any negative impact on performance? Perhaps it's one of those 'wear and tear' items that occasionally need replacing.

 

[Checkswrecks]

You may have noticed from my previous postings that I have a real issue with Aftermarket parts. Yamaha and all other vehicle OEM's take a tremendous amount of care in the selection of materials, suppliers, processes and finishes to ensure that their components meet the performance requirements associated with that specific part of the system. They test, test and test again to ensure safety. Brakes are a safety critical component. You need them to perform as designed that once in your life when you need to do a .7g plus stop!

I was a development engineer and then program manager working on new disk brake systems for the OEM's for 28 years. Bolts gave me some of my biggest challenges. Bolt manufacturing to a very high quality and reliability is challenging - even for Tier 1 suppliers to the industry.

Would I want to change the bolt material away from the specified material selected carefully over many cumulative years of testing by the OEM and their tier 1 supplier to a different material from a supplier that implements what quality systems, with materials supplied from where, on a safety critical system that sees tremendous forces and temperatures up to 700 degrees C+!

I am just saying...

I hear what you are saying and there are a few bolts which should not be replaced with aftermarket. Head bolts, which need to stretch a very specific amount at a very specific torque, for example.

But motorcycle manufacturers are renown for using the crappiest materials and hardware to keep costs low. Honda started this in the 60s and 70s, with their cast pot-metal aluminum that was clear coated to slow corrosion till the bikes were sold. Suzy and Kaw have the softest bolts in the industry. I replace bolts regularly with stainless. Be the new hardware OEM or stainless, the thing I'm careful about is using anti-seize to try to delay dissimilar metal corrosion.

 

[hobdayd]

Bolts are a science.

Anti corrosion materials may not be compatible with the materials you are putting together. Also, when torquing these materials can significantly alter (increase) the bolt preload because they act as a lubricant and allow you to over rotate compared to a dry thread.

Stainless bolts are not all the same. Materials in the aftermarket very considerably. How does the material specification compare to what Yamaha speced for that application? Don't assume Stainless bolts are stronger than the OEM bolts.

Just saying...

 

[markjenn]

I'm with many of the others in this thread - I would not be replacing "mission critical" fasteners like brake caliper bolts with Home Depot parts unless I did a lot of research to be sure the HD parts meet/exceed OEM specs. That being said, any bolt is better than no bolt, so in an emergency, you do what you have to do.

- Mark

 

[Checkswrecks]

Something is missing in the interpretation, as I generally don't use Home Depot or other cheap hardware unless it's for working on something around a house. Even then, I still have a bunch of AN and old stock which is better.

There are plenty of online sources for good hardware and for people to learn the differences.

 

[snakebitten]

No Bob, it isn't a language issue.

It's a lynch mob and you are now dangling on the bolt aisle at Tractor Supply. lol


(That's what you get for talking smack about my KLR)

 

[Checkswrecks]

No Bob, it isn't a language issue.

It's a lynch mob and you are now dangling on the bolt aisle at Tractor Supply. lol

(That's what you get for talking smack about my KLR)

LOL - Got it.