Re: [ST] balance shaft

["Jez" <jmjm@xxxxxxxxxxx>]

- -----Original Message-----
From: Brian D <brd@xxxxxxx>
To: ST@xxxxxxxxxxxxxx <ST@xxxxxxxxxxxxxx>
Date: 15 July 2002 20:29
Subject: Re: [ST] balance shaft


>Maybe it's just a misbalanced crank, rod, etc.  It's really hard to
>quantify a vibration.

Brian,
Try mounting a pencil to whatever vibrates most - eg rear footrest.Hold a
piece of paper backed with something against it, rev to 4000, then move the
paper sideways or down at a constant speed.
You'll get a  series of small waves. Go for a ride 40 miles+ and repeat. I
bet the waves get higher.
It's not a massive difference but it's another confirmation of the problem.
(Or so I would guess, of course I would never ride around with several
pencils taped to the bars,footrests etc :-) )

Jez


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