Front fork 75/5

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slyngej
Posts: 43
Joined: Tue Jul 28, 2015 6:19 am

Re: Front fork 75/5

Post by slyngej »

Ive read a bit about it on the pages you've send. So its a /5 bike from '71, its only one of the fork legs which seems to be broken in some way. I bought it this summer, and tried to change the fork oil, none came out of the left fork leg. I thought, okay - maybe there simply any in it. But i couldn't pour any in it, like it was already full, so i guess theres something which sort of "clogged" it, maybe a broken bearing or some other rubber part.

I have been looking on this kit: http://www.boxup.eu/index.html?bmw_r50_ ... steile.htm

Including bearings, rings, spring and so on

My actual question now i guess is: Depending on ho bad it looks, say if only it is the oil sealing rubber parts needs to be replaced, do you guys think it still is a good idea just to replace it all?
daz
Posts: 343
Joined: Wed Aug 04, 2010 4:07 pm
Location: Ohio

Re: Front fork 75/5

Post by daz »

I just bought a kit from Hucky's for less than a hundred dollars. parts@bmwhucky.com.
1971 R50/5, 1980 R100T,
CRF 300 Rally, CRF 250F,
1947 James ML
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jagarra
Posts: 896
Joined: Mon Dec 26, 2011 12:42 pm
Location: Reno, Nevada

Re: Front fork 75/5

Post by jagarra »

If no oil is coming out of that leg I would guess the bumper pad at the bottom has disintegrated and is blocking the hole.
Very common to be replacing this item, they don't last forever. Your new kit should have what you need.
1974 R90/6 built 9/73
1987 BMW K75S
1994 BMW R1100RS
1964 T100SR Triumph
1986 Honda XL600R
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SteveD
Posts: 4870
Joined: Tue Aug 03, 2010 3:29 am
Location: Melbourne, Oz.

Re: Front fork 75/5

Post by SteveD »

Poke some wire up the drain hole. It won't hurt anything.
Cheers, Steve
Victoria, S.E.Oz.


1982 R100RSR100RS supergallery. https://boxerboy81.smugmug.com/R100RS
2006 K1200R.
1994 R1100GS.
Duane Ausherman
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Location: Galt California
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Re: Front fork 75/5

Post by Duane Ausherman »

Give this bike the stiction test before and after your work. From experience, I can tell you that it is very unlikely that it can be a good operating fork after just that bit of simple repair work.

I hope that it shows up as stiction free before and after the work.
Ask the Indians what happens when you don't control immigration.
Rob
Posts: 3085
Joined: Thu Feb 13, 2014 2:05 am

Re: Front fork 75/5

Post by Rob »

Duane Ausherman wrote:Give this bike the stiction test before and after your work. From experience, I can tell you that it is very unlikely that it can be a good operating fork after just that bit of simple repair work.

I hope that it shows up as stiction free before and after the work.
When I did a simple "right-click highlight Google search 'stiction test'", I came up empty.

But when I prefixed it with "BMW motorcycle", the first 3 hits were for your site, Duane!

https://www.google.com/search?q=stictio ... ction+test
Rob V
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