Gen II vs Gen I fork spring rates




turbobusa2000

Registered
Does anyone know if there is a difference between the gen I and gen II spring rates in the forks, or for that matter any differences.
 

Professor

Hayabusa Immortal
Staff member
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I'm sure the Gen II springs are stiffer from ridding a couple but I have not seen documentation on what the rates are on the Gen II.
 

kairles

Donating Member
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per Race Tech's site

GenI (fork spring).850 kg/mm (shock spring)13.1 kg/mm

GenII (fork spring).930 kg/mm (shock spring)N/A
 

Professor

Hayabusa Immortal
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From the way i see it,not much of a difference not worth the effort
.950 springs make a big difference in a Gen I bike. I think the Gen I bikes are undersprung in the front unless the rider weighs 120 lbs.
 

Tufbusa

Track Coach / TufPoodle Coach
Registered
per Race Tech's site

GenI (fork spring).850 kg/mm (shock spring)13.1 kg/mm

GenII (fork spring).930 kg/mm (shock spring)N/A
I have not seen any official info on the gen II spring rates. Would you mind sharing your source of info?
 

Mr Bogus

Trouble Makers Inc.
Donating Member
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I also saw were the .93 was stock for Gen2

I also had my suspension setup by "Turn One Racing" at the track..

I am 240 + gear, they had to bottom my preload settings on the 1.10 spring to set for 25mm sag.. this really had a positive effect on the dive on hard braking as well..

Turn one for the track I was at is a 175 mph down to around 100 mph corner entry speed and takes substantial braking if you are going to over take on late braking.. I was just about bottoming out the tubes prior to the adjustment.. now running about 3/4 full compression

Is topping out the tubes on the long front straight however where elevation drops about 10' in about 100' (front tire leaves the ground)

I have been riding on the street with the same sag setting on the 1.10 and seems a bit stiff but easily do-able..
 

dadofthree

Seasoned Beef
Donating Member
Registered
There's a difference. I've heard and have made comments about the Gen II front end being bouncy. I've been told the springs are different and you can feel it.
 

turbobusa2000

Registered
Thanks for the replys fellas. I bought a set of forks from a gen II that I'll be swapping on my Gen I. I really did it for the radial brakes and was hoping that the spring rate was a little stiffer. I also got a pair of the 09 gsxr 1000 monoblocs to put on too!

Dan
 



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