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post #1 of 7 (permalink) Old Nov 2nd, 2015, 5:04 am Thread Starter
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slide fork tubes

hello guys,

i would like to now,why my fork tubes not slide through the tripple clamp?
i notice a litle hump so i had to adjust my clamp a liltle bit,anyone notice this problem before?

king regards
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post #2 of 7 (permalink) Old Nov 2nd, 2015, 8:07 am
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Hump???? As in a bend in the tube? May be time to remove them and roll them on a flat surface.Really shouldn't be any hump.

Would also be nice to know exactly which bike that is instead of some generic question that could apply to most bikes.BMW ???? With OEM fork brace or add-on ? There is a procedure to align the front end/forks.Not following it or trying to adjust may cause stiction/binding of the forks.Dangerous....!

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post #3 of 7 (permalink) Old Nov 2nd, 2015, 12:54 pm Thread Starter
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Oh sorry, is the BMW k100.
Okť i van see no bending,andere if i will check it than i must puth everything off, is tgere an other wat to check?
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post #4 of 7 (permalink) Old Nov 2nd, 2015, 3:13 pm
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I don't know where the procedure is and would rather not play Google search today. My procedure is somewhere at the bottom of my head....!

Get a thicker piece of flat glass. Put it against the tubes between the lowers and the triple tree. Has to contact evenly. If not something is out of whack and probably can be corrected loosening the pinch bolts and then tightening in sequence with the glass touching all the way on the tubes.

Should all be done with the wheel off otherwise the weight of the wheel will fight against you trying to fine tune.Fender off....fork brace off??? Let me think....I'll ask again if you have a fork brace? Aftermarket ones like the Telefix I had on my 85 can be touchy as to the tightening sequence and would throw the tubes out of alignment enough that they couldn't be pushed up through the triple trees if one didn't follow the proper procedure.

Most of that is in the free Hayne's K75-K100 manual that is floating online somewhere.

Here is the BMW manual, should get you started:
http://www.k100.biz/pdf/OFF/K100_K75_2V_eng.pdf

More details in the Hayne's:
http://service.tanga-moteurs.ro/data...s%20Manual.pdf

Benelli 50cc at 14
Yamaha RD 200 at 16
Yamaha RD 350 at 17
Honda CB 750 F at 18
Honda V45 Sabre at 24
BMW K100RS at 27
BMW R100GS at 34
BMW K1200RS at 53
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post #5 of 7 (permalink) Old Nov 3rd, 2015, 4:59 am Thread Starter
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okť man ,thank you verry much for this info!! A friend of my thinks it has a verry little bend,

because i sandid the "lower" clamp 1or2 mm,and puth than the tubes 2cm through the upper clamp.

everything fits like it has to, (fork brace,wheel axle,brakes etc..)

should i buy everything new and replace it??
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post #6 of 7 (permalink) Old Nov 3rd, 2015, 8:33 am
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I don't know about new....there should be some good used parts around.

Just rotating the tube by hand when still assembled could show the bend.

Older bike....if like mine back then probably time to disassemble the forks for a good cleaning and inspection of the wear parts.If like my 85 the nylon sliders can wear out and make the front suspension rather noisy. Clack....clack...clack.

And the steering head bearings...most probably need an inspection and lube.Good time to do that if you have the forks off the bike and that also let you inspect the lower triple tree on a flat surface just to make sure that isn't bent.

Benelli 50cc at 14
Yamaha RD 200 at 16
Yamaha RD 350 at 17
Honda CB 750 F at 18
Honda V45 Sabre at 24
BMW K100RS at 27
BMW R100GS at 34
BMW K1200RS at 53
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post #7 of 7 (permalink) Old Nov 3rd, 2015, 10:15 am Thread Starter
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Okť Thanks verry much!!
Grt, Guido
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