12mm front brake caliper bolts

[Sealion127]

hi , anyone know where i can get 4 from , seen some on ebay but there £20!!, mine were seized on and rounded off , took a hammered on 11mm socket to shift them  .


cheers in advance


chris

[darrsi]

Always helpful if you list what year of bike you have in your profile, but i'd imagine they're all the same. (no.25 & no.14, but they are the same bolt and part number)

http://www.yamahamotorcyclespares.co.uk/...IPER&uID=0

[Dead Eye]

You can find the size and thread pitch from the workshop manual and then just buy them on eBay - I did this recently for the two rear caliper mounting bolts

The download is here http://foc-u.co.uk/index.php?action=down...iew;down=8

The Front Brake caliper bolts should be M8 x 1.25

Unfortunately it doesn't show length BUT that is by far the easiest thing to measure Just remember that length is from the base of the bolt head to the end of the thread (so basically doesn't include the bolt head)

[mars696]

Because i recently change them,the bolts are M10 x 1.25. The manual says M8 but its wrong.
I used 10.9 metric(which is 8 grade american).DOnt use soft bolts there!
Hope it helps!

[nick crisp]

Don't these bolts have to be of a certain tensile strength?

[Dead Eye]

Because i recently change them,the bolts are M10 x 1.25. The manual says M8 but its wrong.
I used 10.9 metric(which is 8 grade american).DOnt use soft bolts there!
Hope it helps!

Really? I thought the rear were M10 and the fronts M8 especially since they take a different socket - at least that's the case on my bike :|

I'll check in a minute as I'm working in the garage today on the bike anyways

[nick crisp]

Don't these bolts have to be of a certain tensile strength?

Don't want to harp on about this, but I think it's actually pretty important. I believe the torque settings on these bolts are quite high, that's one reason for the tensile rating requirement. Also, if I remember right, they need to be Loctited in place when you refit them.

[mars696]

Nick,
If i remember well the oem bolts are 8 grade,wich is the equivalent of 10.9 in metric system.
Of cource we can use titanium bolts   but the price is prohibitive. :'(

[nick crisp]

I just wanted to be sure that people don't just use any old bolts as the discussion here seemed to be more about sizes with no mention of other requirements. I know you'd already mentioned this mars696, but wanted to make sure people picked up on it. I've got nothing better to do, sorry!

[mars696]

You are right,safety first!!!

[Dead Eye]

Well, my results were unhelpful... I forgot that the previous owner was a bit mad and so I have three different sized hex bolts holding my calipers on - 1x 14mm, 1x 13mm and 2x 12mm

If nothing else, my bike has character...

[darrsi]

No need to Loctite them, if they're torqued correctly they're going nowhere.

[nick crisp]

[quote author=nick crisp link=topic=9207.msg92172#msg92172 date=1375523061]
Don't these bolts have to be of a certain tensile strength?

Don't want to harp on about this, but I think it's actually pretty important. I believe the torque settings on these bolts are quite high, that's one reason for the tensile rating requirement. Also, if I remember right, they need to be Loctited in place when you refit them.
[/quote]

Nick,
If i remember well the oem bolts are 8 grade,wich is the equivalent of 10.9 in metric system.
Of cource we can use titanium bolts   but the price is prohibitive. :'(

I just wanted to be sure that people don't just use any old bolts as the discussion here seemed to be more about sizes with no mention of other requirements. I know you'd already mentioned this mars696, but wanted to make sure people picked up on it. I've got nothing better to do, sorry!

You are right,safety first!!!

Well, my results were unhelpful... I forgot that the previous owner was a bit mad and so I have three different sized hex bolts holding my calipers on - 1x 14mm, 1x 13mm and 2x 12mm

If nothing else, my bike has character...

:rollin Aaaaaagh! :rolleyes :'( :lol

[Sealion127]

thanks for the help and advice , i will order some titanium ones i think .