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Old 04-17-2013, 09:21 AM   #75901
FatChance
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Quote:
Originally Posted by french horn View Post
When loaded, how much weight do you reckon the rear subframe is supporting with that setup?
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Old 04-17-2013, 09:28 AM   #75902
Rusty Rocket
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Quote:
Originally Posted by inroads View Post
I'm gonna insert a 3/4" pvc spacer along with the stock spacer on top of the fork springs for some cheapo fork anti-dive.
Anyone try this or have thoughts on it?
stock springs are .40 Kg/mm. (straight rate) That means that they compress the same whether or not you squeeze them with preload. You will raise your ride height, but the dive should be about the same.
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Old 04-17-2013, 10:55 AM   #75903
JagLite
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Cool2 fork preload spacers

Quote:
Originally Posted by inroads View Post
I'm gonna insert a 3/4" pvc spacer along with the stock spacer on top of the fork springs for some cheapo fork anti-dive.
Anyone try this or have thoughts on it?
Certainly!
Many of us replace the stock (heavy!) steel spacers with PVC or ABS spacers. I don't remember which size & wall thickness fit best.

I bought a standard length short piece (3' I think) and cut several lengths to experiment with.
The length I ended up using makes it a real challenge to get the cap screwed back in though.

The stock spring is progressive wound with the tighter coil spacing at the top as I recall so longer spacers preload the lower spring rate of the tight coils.

On my street tracker I cut the springs shorter (off the tight coil end) to make them stiffer but I haven't ridden it yet to see how I like it.
Still more than 24" of snow at my house in the hills.

Look here for fork spring cutting information if you are interested:
http://motorcycleinfo.calsci.com/Sus...aseForkSprings
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Old 04-17-2013, 10:59 AM   #75904
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Quote:
Originally Posted by inroads View Post
I'm gonna insert a 3/4" pvc spacer along with the stock spacer on top of the fork springs for some cheapo fork anti-dive.
Anyone try this or have thoughts on it?
Quote:
Originally Posted by Emmbeedee View Post
Heave the stock spacers and just put longer spacers of a lighter material. The stock spacers weigh about 5 pounds each.

I found ABS nipples like this in a couple of different lengths at Home Depot for a couple of bucks each.

Depending on your weight, 3/4" might be too much. I'm 210 pounds ready to ride and hated the fork dive too. So I added 1/2" spacers, it was too stiff, so I tried 1/4", too soft. 3/8" would have been correct for me but I decided to go with aftermarket springs (.46) and RT emulators.

Emmbeedee has a good idea. So you'll know what to buy at Home Depot: Stock fork spring spacer: 37mm diameter (1.465") - 40mm tall (1.58"). Add 3/4" (or whatever you want) and cut to fit, test ride, repeat.

Rusty is right, your spring rate will still be too soft to control the DR's weight, but even with 1/4" my brake dive was much better (less).
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Old 04-17-2013, 10:59 AM   #75905
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Quote:
Originally Posted by Rusty Rocket View Post
stock springs are .40 Kg/mm. (straight rate)
Actually, the stock springs are progressively wound. The initial spring rate is .38 kg/mm and the final rate is (I think) .44 kg/mm. The spring transitions out of the soft rate at about 7.5" of compression.
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Old 04-17-2013, 12:11 PM   #75906
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Quote:
Originally Posted by ER70S-2 View Post
Emmbeedee has a good idea. So you'll know what to buy at Home Depot: Stock fork spring spacer: 37mm diameter (1.465") - 40mm tall (1.58"). Add 3/4" (or whatever you want) and cut to fit, test ride, repeat.
I just remembered something else I did when I put the plastic nipples in - I made sure I had a washer above and below the nipple. And adding more washers would be a good way of adding small increments, when trying to reduce fork dive.
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Old 04-17-2013, 12:18 PM   #75907
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Quote:
Originally Posted by Emmbeedee
Heave the stock spacers and just put longer spacers of a lighter material. The stock spacers weigh about 5 pounds each.

I found ABS nipples like this in a couple of different lengths at Home Depot for a couple of bucks each.

Damn, I should have thought of this when I had my forks apart!

That said, if I lowered the forks' ride height (per the shop manual), are these spacers unsprung weight? I would guess they are because they're now below the springs. Rats.
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Old 04-17-2013, 12:21 PM   #75908
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Quote:
Originally Posted by Emmbeedee
I just remembered something else I did when I put the plastic nipples in - I made sure I had a washer above and below the nipple.
Isn't this to provide a nice flat interface between the nipple and the top coil of the spring?
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Old 04-17-2013, 12:37 PM   #75909
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sweet emulator setup?

While you're talking forks, I'm finally installing my .47 springs and emulators.
The emulators came with the yellow springs and 4 turns preload. I'm 195lbs plus gear and hope to keep an initial plush/compliant ride while eliminating the wallowing and worse that occurs way too often.

Seems Rick? from Cogent mentioned something about the sweet setup for emulators in DisTech's thread but I never saw what it was. So far I figured I'd start with 2.75 turns preload and 10w oil at stock volume.

Any thoughts?
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Old 04-17-2013, 01:09 PM   #75910
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Quote:
Originally Posted by Bronco638 View Post
Isn't this to provide a nice flat interface between the nipple and the top coil of the spring?
Yes, but I put a washer over and under the plastic nipple just to protect it. There's only one washer in the standard setup.
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Old 04-17-2013, 01:18 PM   #75911
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The stock spacers weigh about 5 pounds each. ????

I haven't weighed my stock spacers but have had them in my hands several times and they don't come close to 5 lbs. Mine are steel pipe are yours solid lead billet?

TravelGuy

I found ABS nipples like this in a couple of different lengths at Home Depot for a couple of bucks each.

[/QUOTE]
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Old 04-17-2013, 01:48 PM   #75912
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Quote:
Originally Posted by TRAVELGUY View Post
The stock spacers weigh about 5 pounds each. ????

I haven't weighed my stock spacers but have had them in my hands several times and they don't come close to 5 lbs. Mine are steel pipe are yours solid lead billet?
I may have exaggerated it a little. It's probably no more than 4. :)

Suffice it to say they're far heavier than necessary.
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Old 04-17-2013, 01:54 PM   #75913
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oops, 205'd

Quote:
Originally Posted by TRAVELGUY View Post
The stock spacers weigh about 5 pounds each. ????
A tiny exaggeration for effect. I doubt they weigh any more than 4.5 pounds each.
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Old 04-17-2013, 02:27 PM   #75914
Rusty Rocket
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Quote:
Originally Posted by procycle View Post
Actually, the stock springs are progressively wound. The initial spring rate is .38 kg/mm and the final rate is (I think) .44 kg/mm. The spring transitions out of the soft rate at about 7.5" of compression.
That's what I get for going from memory.
the amount of preload that you will be able to get into the fork probably won't help with the dive problem enough.

Fork springs are fairly reasonably priced for "value received" (bang for the buck).
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Old 04-17-2013, 02:37 PM   #75915
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Quote:
Originally Posted by psmcd View Post
While you're talking forks, I'm finally installing my .47 springs and emulators.
The emulators came with the yellow springs and 4 turns preload. I'm 195lbs plus gear and hope to keep an initial plush/compliant ride while eliminating the wallowing and worse that occurs way too often.

Any thoughts?
I'm the same weight and have the same springs as you. I found 4 turns of preload on the emulators (10W fork oil) to be too harsh for my riding (exclusively street, and the bike is stripped down to 346 pounds wet). I'm at 3 turns now, and that is pretty good. If I ever go back into my forks I'd probably back off another 1/4 to 1/2 turn, so your estimate of 2.75 turns sounds about right to me. Offroad riders and those with heavy payloads may have a different view.
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