Using different rate fork springs?


12 replies to this topic
  • Jim813

Posted April 03, 2009 - 07:19 PM

#1

If I am trying to achieve a .490kg/mm spring rate, and I don't believe anyone makes .490kg/mm springs for a 08 yz450f, can I use a .480kg/mm spring in one fork leg and a .500kg/mm fork srping in the other fork leg without having any problems?

  • AZ Thumpdaddy

Posted April 03, 2009 - 08:01 PM

#2

Try Enzo Racing in Santa Ana, California. They put .49 springs in mine and revalved for my 07 YZ450. I am 225 lbs. They also revalved my rear and resprung with a 5.8. They do good work - I am satisfied.

www.enzoracing.com

  • tnl

Posted April 03, 2009 - 08:14 PM

#3

If I am trying to achieve a .490kg/mm spring rate, and I don't believe anyone makes .490kg/mm springs for a 08 yz450f, can I use a .480kg/mm spring in one fork leg and a .500kg/mm fork srping in the other fork leg without having any problems?


Try calling Stich at trix stix suspension (East side) or Palo Verde suspension (west side) both local shops.

  • 642MX

Posted April 04, 2009 - 04:42 AM

#4

If I am trying to achieve a .490kg/mm spring rate, and I don't believe anyone makes .490kg/mm springs for a 08 yz450f, can I use a .480kg/mm spring in one fork leg and a .500kg/mm fork srping in the other fork leg without having any problems?


Yes you can, its common practice in most suspension shops.

  • Jim813

Posted April 09, 2009 - 06:20 AM

#5

Thanks,

My only other quetsion is could I use a .47kg/mm spring in one leg and a .50kg/mm in the other to achieve .485kg/mm?

  • osheen

Posted April 09, 2009 - 07:22 AM

#6

Yeah, you can do that, but that is about as far a difference in springs that I'd go between the two sides. I wouldn't recommend more than that.

I measured the spring rate of my 08 YZ450 springs to be .49 even though the manual says they are supposed to be .47 . I have a highly accurate way of testing them. I bought some .45 springs from Factory Connection and I measured them to be exactly that using same test. I don't put any faith in the rate until I have measured them for myself.

My 2 cents worth....

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  • gdbarr1976

Posted April 09, 2009 - 08:51 AM

#7

Two different rate springs to achieve a third overall rate. Never thought of that. I may try it

  • SXP

Posted April 09, 2009 - 09:17 AM

#8

I have a highly accurate way of testing them....


Would you mind sharing your method (especially if it can be accomplished in the garage w/o specialized equipment)?

  • grayracer513

Posted April 09, 2009 - 09:19 AM

#9

The effective rate in the fork is the sum of both springs, whether they match exactly or not. As long as they are reasonably close in rate, differences form one side to the other are OK.

  • osheen

Posted April 10, 2009 - 11:56 AM

#10

Would you mind sharing your method (especially if it can be accomplished in the garage w/o specialized equipment)?


I'll start a new thread to explain how. I don't want to hijack this thread......

  • SXP

Posted April 10, 2009 - 08:16 PM

#11

I'll start a new thread to explain how. I don't want to hijack this thread......



Thanks!

  • FinchFan194

Posted April 10, 2009 - 09:13 PM

#12

I have .46 and .48 from Racetech in my bike to achieve .47 in my scoot.

  • motox88

Posted April 11, 2009 - 05:12 AM

#13

Would you mind sharing your method (especially if it can be accomplished in the garage w/o specialized equipment)?


Dude your avatar looks damn near like my injury. tibia plateau break.

Posted Image





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