Thu Jun 12 10:27:48 1997 - Message No. 1035
From: sture.qvarfordt@omgroup.com

Subject: Re: Full metal sound






Hej Pierre and The List,

"Clakk" is very describing for the sound.
Your answer is comforting, because the alternative with the fork hitting
the bottom of the fork tube would be the least damaging. I have ruled out
the worst alternative, the one with fluid compression (the movement stopped
by the oil) because in an earlier mail  you wrote that the oil level should
be 106 mm (RD07) below the top when fully compressed. (BTW This rules out
the method of adjusting the oil level, measured in mm, with a syringe
without removing the top caps i.e. through the air valves, as suggested in
an earlier mail on the list . At least it has to be a very different
measurement than 106 mm).

But this brings up another question. How much would the tolerance be
between fully compressed fork/fork tube and fully compressed spring? That
would be the maximum length of a "distance tube" (piece of tube used to
preload the springs). At least I would think that it would be not so wise
to exceed such a length.

Examples when you might want to increase the spring preload:
*  Front end unstable at high speed, unstable when accelerating out of
curves i.e. fork angle too steep, front-end too low in comparison to rear
end.  -> Lower fork leg in triple clamp (not much to do on an @), increase
front fork spring preload.
* Front fork can handle smaller bumps but is too hard during the last part
of the travel i.e. spring force too progressive -> Lower fork leg in triple
clamp, increase front fork spring preload, or change to harder springs.

Keep sliding,
maybe standing on your foot pegs, if you like that,
but avoid "clakking"
/Sture Q.




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dipper@normans.isd.uni-stuttgart.de