i need to buy two rear brake calliper mounting bolts for my 1986 K100 RT. I don’t have the old ones, but it appears on the online parts fiche they are M10x25 fillester head, as opposed to the front bolts which are M10x30. 

Can someone please confirm this is correct, that they are 25 mm for the rear callipers and 30 mm for the front? And do the front and back use the same type of washers?

And if someone near Brisbane has two spare bolts they can sell me, please let me know.

Thanks

I seem to remember one of the bolts for the rear caliper on mine is shorter, but none of them are original so it's hard to say for sure!

Hello Michael , I've got an 87 KRS , pulled a few bolts out just now , the rear is an M10x25 , the front is also M10x25 . They are NOT fillester head ( had to google what a fillester head is ! ) they are socket head cap screws ( Allen head ? ) . Mine have all been replaced with stainless version , there appears to be plenty of stainless bolt places in Brizzie , oh and lastly I don't use washers but from memory they are flat with the outside diameter just slightly larger than the cap screw head

Hope this helps you

John Re

Melbourne Australia

Okay, thanks for doing that John.

Hi Michaelvass

I have Stainless ones coming, hopefully should arrive next week.  So if there are no issues I'll have them available.

Cheers, Chris.

Hi Chris, how did you go? Are your old bolts available?

Arrived during the week and will be putting them in tomorrow.

Available if wanted.  Will PM you with phone number.