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upgraded shocks and springs

  • Thread starter Thread starter shinzon1
  • Start date Start date
On the emulators they list one size fits both cause that's how they work. They just sit down inside the fork, not really any place for them to go, so a 35mm emulator isn't going to move inside a 37mm fork. I've never measured either but the 37mm fork ID may be the same as a 35mm and they used thicker walled forks perhaps. I do know that on more modern bikes with larger diameter forks it doesn't necessarily equate to them being all the much more stiff than older smaller diam forks because the tube walls are thinner.
 
ok. i'll look at that. that does make sense. i started to think that might be the case when looked at a breakdown of how the emulators go in there. didn't seem to have a seal. just seemed to sit in there. thanks! i'll give chris a call tomorrow when they open back up. he's been very helpful to me. especially with my chain swap.
 
There is lots of leeway with Emulators, they don't have to be a tight fit but they do have to fully cover the top of the damper rod & provide enough of a platform for the spring.

The 650XS 35mm ones will not fit in a 37mm GS fork without an adapter, they are just a touch too small on both the bottom part that goes into the damper rod cup & the top for the spring.
The ID of the 37mm tube is 28mm.,

Dan :)
 
i think i'm just gonna save up some more money and get the ones from racetech rather than trying to make an adapter.
 
when i replace my fork springs with new ones do i just put a spacer tube in place of the original upper spring? The upper spring is relatively soft atleast compared to the longer lower spring.
 
Just use what holds the front end up and gives you the stiffness you prefer. If you buy Progressive springs, they'll probably be long enough by themselves, though most guys use some kind of preload spacer, made from washers, steel tube or pvc pipe. On my 550, I needed only a few flat washers, to add about 1/2 inch.
 
i'm planning on using some sonic straight rate springs with some racetech emulators. my problem is the springs are only like 14 inches long. the lower spring by itself is about 18.5 inches. plus the 6.5 inch upper spring. granted the emulator will give me some more length but the spacer will have to be like ten inches long if i don't use the very soft upper spring.
 
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Replace it with PVC pipe. Otherwise you'll have a dual rate spring with very soft start...

On a 550 I worked on I simply removed the soft spring and replaced it with spacer. Worked great.
 
ok. i will. it just seemed like a very long spacer. most of the ones i've read about that put spacers in are only about 3 inches long give or take not 10 inches.
 
As long as the spring you use has enough compression to allow full fork travel then it doesn't matter how much spacer you have in there.

Preload takes away from the available spring compression.
With. 14" straight rate spring I suspect the available compression has to be at least 7" probably more.
Sonic should have those figures.
 
Do you want me to ride it for you as well?? :lol:

Probably 5" I would think however it's impossible to know for sure as it appears you don't have stock forks fitted if yours are 37mm..

If you have the springs removed you can measure it :)
 
that would be nice. take some of the guess work out of it.:D
every piece of information I can find says the 79 750 L had 37mm. while all the others had 35mm. Z1 shows the L series having 37mm forks. I do appreciate all the help though!
 
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