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Confused with progressive front springs GS1000E 1979

  • Thread starter Thread starter gs79
  • Start date Start date
you can measure the sag on the forks by putting a zip tie around the fork leg, quite tight, but not to tight to move. sit on the bike and push the zip tie so it sits flush with the top of the fork bottom. carefully get off the bike and put it on centrestand, front wheel off the ground.
then measure the gap between the zip tie and the top of the fork bottom
 
Agemax said:
you can measure the sag on the forks by putting a zip tie around the fork leg, quite tight, but not to tight to move. sit on the bike and push the zip tie so it sits flush with the top of the fork bottom. carefully get off the bike and put it on centrestand, front wheel off the ground.
then measure the gap between the zip tie and the top of the fork bottom
Click to expand...
That method can get you close, but I like to bounce the suspension a bit to remove any 'stiction' in the seals.

If you use the zip-tie and get on carefully, there might be just enough stiction (STatic frICTION) in the seals to prevent that last little bit of movement to the proper resting place. Bouncing a bit settles it in. :o

It is good for an estimate if you can't find a helper, though.
icon_thumbsup.gif


.
 
Many thanks for the replies guys I will fit the front wheel and measure the sag tomorrow and let you know.
 
Steve said:
That method can get you close, but I like to bounce the suspension a bit to remove any 'stiction' in the seals.

If you use the zip-tie and get on carefully, there might be just enough stiction (STatic frICTION) in the seals to prevent that last little bit of movement to the proper resting place. Bouncing a bit settles it in. :o

It is good for an estimate if you can't find a helper, though.
icon_thumbsup.gif


.
Click to expand...

bounce the forks, then reposition the zip tie. :)
 
Sounds like you had GS1000S spec fork internals - 351mm springs and the standard S spacer of about 5 or 6 inches. Quite a few GS1000E bikes came (in the UK) with that set up as well. If you measure the springs that came out you'll know (service limit is 346mm)

Best follow the procedure for setting your forks up to your personal settings and how you like to ride.
 
hampshirehog said:
Sounds like you had GS1000S spec fork internals - 351mm springs and the standard S spacer of about 5 or 6 inches.
Click to expand...
Well, how about that. :-k

If the springs were 351mm and you had a spacer that was just under 5 1/2 inches (5.47"), you would be right at that 491mm total length. :D

.
 
hampshirehog said:
Sounds like you had GS1000S spec fork internals - 351mm springs and the standard S spacer of about 5 or 6 inches. Quite a few GS1000E bikes came (in the UK) with that set up as well. If you measure the springs that came out you'll know (service limit is 346mm)

Best follow the procedure for setting your forks up to your personal settings and how you like to ride.
Click to expand...


Reckon, you are spot on my friend :)
 
Finally got round to checking out the fork sag on the GS. The full extended fork is 140mm from the top of the dust seal to the underneath of the steering stem. Sitting on the bike on tip toes after bouncing the forks a couple of times the forks move 83mm. If my sums are correct that is a sag of 57mm - which is approximately 40% of the travel. I presume this means I need to add a spacer to bring the sag into the 25 to 30% range is this correct please.
 
Just checking with you guys, what the correct fork sag figure should be for a Suzuki GS1000E. I have just fitted new progressive springs and the fully extended fork length is 140mm, fork movement when sat on bike and forks bounced is 83mm, giving a sag of 57mm.
 
Thanks for the reply, when I sit on the bike it seems a little low. I was a little concerned about bottoming out with the fairing touching the mudguard. Have remounted the fairing 2 inches lower than in the avatar. There is 83mm total left once the forks are settled Unfortunately the GS is on a SORN with no MOT so not able to test out.
 
gs79 said:
Thanks for the reply, when I sit on the bike it seems a little low. I was a little concerned about bottoming out with the fairing touching the mudguard. Have remounted the fairing 2 inches lower than in the avatar. There is 83mm total left once the forks are settled Unfortunately the GS is on a SORN with no MOT so not able to test out.
Click to expand...

thats a shame, but i bet you could sneak in a few little jaunts up and down your street and just have a feel braking on the front only, seeing what sort of feel you are getting. :-#
 
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