Fork Leg Questions

Jim D 5112
Posts: 169
Joined: Fri Oct 27, 2006 3:00 am

Re: Fork Leg Questions

Post by Jim D 5112 »

Early 74 R90S had one pinch bolt according to the Ian Falloon book.

rd400f
Posts: 11
Joined: Thu Apr 24, 2014 3:20 am

Re: Fork Leg Questions

Post by rd400f »

Hi
As the 1974 model dose not have the pinch bolt style fork leg on the LH side.
What stops the axle nut from coming loose?
Parts pic seem to show just a flat washer.
Part 10
Front axle parts.JPG
Front axle parts.JPG (13.64 KiB) Viewed 46 times
Not a great amount of length left on the axle if I start putting spring washers under the nut.
20211013_190853.jpg
Suggestions please?
Maybe a spring washer and a half nut?
Loctite ?

Thanks
Richard

sherman980
Posts: 23
Joined: Fri Oct 27, 2006 3:00 am

Re: Fork Leg Questions

Post by sherman980 »

You shouldn't need a wave or lock washer. Just torque it spec (not sure what that is) BEFORE you tighten the axle pinch bolt on the other fork leg. The nut tightens the axle against the fork leg and all of the axle spacers and inner bearing races. Don't recall one ever coming loose in a few 100k miles of riding. Same as the axle nut on the rear and all other (postwar?) BMW axles before it. A drop of blue locktite won't hurt.

Hope that helps.
Chuck S.
Thanks.
Chuck S

rd400f
Posts: 11
Joined: Thu Apr 24, 2014 3:20 am

Re: Fork Leg Questions

Post by rd400f »

Hi
Yes that does help.
I shall forge ahead with the Loctite.
Thanks
Richard

Post Reply