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1987 dives a bit when letting off of the throttle

3K views 12 replies 5 participants last post by  trailscout 
When you do the spring swap note the oil level on each set of forks. If there is a major difference that could be the problem also.

In the old days before adjustable damping and rebound we used to make minor final adjustments to the forks by using different weight fork oil. That would be after we had the correct rider sag on the fork springs and after playing around with the oil level.
 
Since the two fork springs likely have the same outer diameter and close to the same number of coils, the accurately mic'ed diameter of the spring wire should determine the rate spring you might want. That should show in the specs of the spring you are considering. If not call and ask.

Also, a spring that has been over worked may lose some if it springieness and may not measure up to it's original strength. We call that a sacked spring.

From what you report it sounds like the spring is the major culprit with the other variables mentioned by LB along with possible small differences in oil level and viscosity. Viscosity of fork oil will break down over age.
 
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