Boxerworks.com

Garnet wrote:...
As airheads matured and emision standards tightened the jetting was leaned to meet imposed standards. These lean settings made the bikes stumble off the line. The solution was to add the piston springs and later to change to stifer spings. This allowed decent throtle responce with a leaner midrange.

Any compression spring suffers as a result of cycling.
Inspection typically involves either measuring the uncompressed length,
or measuring the force needed to compress the spring.
Having said that, I have never seen any specifications for the Bing CD springs ...

However, even without technical data to measure / ensure stock specification,
we can reasonably assume that spring rate will decrease with usage (at some rate) to be a fact.
Another fact will be that altering the spring rate of a CD / CV carb is an accepted "hot-rod" carb tuning method ...
for the exact reasons as stated by Garnet.

Your conclusion here:

vanzen@rockerboxer.com wrote: Your conclusion here:

My conclusion is :
They are about $6 each,
mine are 24 years / 120,000 km old,
can't hurt,
will be in my next Motobins order.

Also, it may be interesting & perhaps informative
to then measure & compare the new with the old ...

I think it is unlikely you will notice any difference, but you would certainly want them to both be the same.

Why not a small merry go round, with pairs of S bikes for ponys? You could enjoy gazing at the clean bikes and ride too, year round on the merry go round.

R90Steve wrote:Why not a small merry go round, with pairs of S bikes for ponys? You could enjoy gazing at the clean bikes and ride too, year round on the merry go round.

An S going around in circles ? Preposterous !
Going in circles ... and counter-clockwise, I suppose –
How Bourgeois 'Merican is that !

vanzen@rockerboxer.com wrote:

R90Steve wrote:Why not a small merry go round, with pairs of S bikes for ponys? You could enjoy gazing at the clean bikes and ride too, year round on the merry go round.

An S going around in circles ? Preposterous !
Going in circles ... and counter-clockwise, I suppose –
How Bourgeois 'Merican is that !

That is NOT American. It's only American if it's an oval.

Sorry Major ... I digress.