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Monster 695 Race Tech fork springs

Started by LeMonstre, May 19, 2015, 11:06:28 AM

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EEL

#15
May 21, 2015, 05:54:20 AM
I'm 180 and just did a racetech spring upgrade for my 1100 evo. Our bikes weigh the same and i bought a .90 spring. I will tell you now that at .90, my preload adjustment is at the top of its range (almost completely backed out). For me, a.85 would have been the optimal choice so i could have the preload adjustment at the middle of the adjustment range.

do not go any higher than .90. even at your weight youll be at the top of the .90 preload. If you go .95 you will regret it

EEL

#16
May 21, 2015, 06:01:04 AM
One more thing. Make sure they include some aluminum preload spacer tube. They didnt for me and i was forced to wait few days more for them to ship it.

Their springs are smaller than the stock.

search for my post for some additional info.

ducpainter

#17
May 21, 2015, 06:05:06 AM
Quote from: EEL on May 21, 2015, 05:54:20 AM
I'm 180 and just did a racetech spring upgrade for my 1100 evo. Our bikes weigh the same and i bought a .90 spring. I will tell you now that at .90, my preload adjustment is at the top of its range (almost completely backed out). For me, a.85 would have been the optimal choice so i could have the preload adjustment at the middle of the adjustment range.

do not go any higher than .90. even at your weight youll be at the top of the .90 preload. If you go .95 you will regret it
Optimal preload for a spring is approx 15mm. Not necessarily the middle of the adjuster range.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


EEL

#18
May 21, 2015, 10:28:46 AM
Quote from: ducpainter on May 21, 2015, 06:05:06 AM
Optimal preload for a spring is approx 15mm. Not necessarily the middle of the adjuster range.

Thats the first time I've heard that. I would like to know more about this 15mm and how you physically measure it. Most springs in a fork are preloaded to some degree when they are installed in the fork (even with the adjuster backed out. So how do you calculate this 15mm?

Thanks

ducpainter

#19
May 21, 2015, 10:43:03 AM
Quote from: EEL on May 21, 2015, 10:28:46 AM
Thats the first time I've heard that. I would like to know more about this 15mm and how you physically measure it. Most springs in a fork are preloaded to some degree when they are installed in the fork (even with the adjuster backed out. So how do you calculate this 15mm?

Thanks
That's true if you use spacers that are too long. If you tune the spacers to be exactly the right length to give 0 preload when the adjusters are backed out then you simply screw the adjuster in 15mm. That would have the retainer just snug enough to stay in place but not really compress the spring.

On non adjustable forks you tune the spacer to give the 15mm.

If sag is not correct at 15 mm you don't have the optimal spring. At that point you can add or remove preload to correct sag, or change springs.

The 15mm number is +/- 5mm.

That's the way it was explained to me by someone that's been doing it close to 20 years.

"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


koko64

#20
May 21, 2015, 11:35:34 AM
Thats a useful baseline on assembly before you install the forks. Great rule of thumb.
Is it the same for the shock spring preload?
2015 Scrambler 800

ducpainter

#21
May 21, 2015, 01:42:12 PM
Quote from: koko64 on May 21, 2015, 11:35:34 AM
Thats a useful baseline on assembly before you install the forks. Great rule of thumb.
Is it the same for the shock spring preload?
Yup...and very easy to measure on the shock. :P
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


EEL

#22
May 21, 2015, 06:25:31 PM Last Edit: May 21, 2015, 08:32:17 PM by EEL
That jives with ohlins..My DU-737 shock recommends a preload of 12mm as a base setting.

Thank you for that nifty tidbit of knowledge.

LeMonstre

#23
May 22, 2015, 08:50:35 PM
I'm just going to go with the .90
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