Boxerworks.com

1973 R75/5 (LWB)
Upper shock bolts, my parts book says that they are # 07 11 9 913 854 but my local dealer tells me that is not a good number.
A&S BMW lists part number 07 11 9 901 169 but about 1/2 the time that number goes to a small screw.
I would like to have "proper" bolts but I can get M10X45 grade 8 bolts easy enough.
Does anyone have the "real" patr number for these bolts?

Vince

Hucky sells stainless and polished stainless versions in kit form under "33 Rear Axle"

SS bolts are "bling-only", if a bolt breaks and you lose a Shock you will have a REAL-BAD day!

Vince

Who came up with the idea that stainless steel bolts are weak?

George Ryals wrote:Who came up with the idea that stainless steel bolts are weak?

http://www.boltdepot.com/fastener-infor ... rials.aspx

"It is a common misconception that stainless steel is stronger than regular steel. In fact, due to the low carbon content, stainless steel cannot be hardened. Therefore when compared with regular steel it is slightly stronger than an un-hardened (grade 2) steel fastener but significantly weaker than hardened steel fasteners."

I never use SS in situations where it has to deal with variations in stress or regular shocks, SS can handle static-loading but it (generally) is "brittle".

Vince
(who will probably go find some grade8 M10X45 bolts to use as top Shock bolts).

robtg wrote:

George Ryals wrote:Who came up with the idea that stainless steel bolts are weak?

http://www.boltdepot.com/fastener-infor ... rials.aspx

"It is a common misconception that stainless steel is stronger than regular steel. In fact, due to the low carbon content, stainless steel cannot be hardened. Therefore when compared with regular steel it is slightly stronger than an un-hardened (grade 2) steel fastener but significantly weaker than hardened steel fasteners."

I am running stainless replacement axles in all my bikes. Were the originals hardened?

So 100,000 to 125,000 psi typical tensile strength ( Grade 5 carbon is 105,000 t0 125,000 psi minimum tensile strength) is not strong enough for use on a motorcycle?

If hardened bolts will help keep my wheels from falling off at Highway-speed, gimmee the hardened bolts!

Vince

George Ryals wrote:So 100,000 to 125,000 psi typical tensile strength ( Grade 5 carbon is 105,000 t0 125,000 psi minimum tensile strength) is not strong enough for use on a motorcycle?

I think ss is plenty strong enough. I just brought up that site to show the differences between ss and the other grades
of bolts.