Rear shock spring size ??

Howdy, Does anyone have a suggestion for a rear shock spring on a 01 WR 426 for a rider that weights about 220 without gear? I can't make up my mind and was hoping you guys could help! The stock spring is a 5.0 and I have to crank it down to a spring lenght of about 235 mm to get the proper sag. This is well below the springs ajustment size of between 240.5 to 258.5. I think I need to go up two sizes to a 5.4 to achieve the proper sag and pre sag. I would like to try this before I have to have the suspension done by someone and see if this will make it better for now. Anyone have a 5.4 they would like to sell that still has some life in it?


Thanks in advance


messed up this reply, so to bail myself out and play victim:


[ November 18, 2001: Message edited by: NH Kevin ]

NH kevin, I went to their site and came up with a rate of 5.480 this figure is figured with a rider weight of 220 without gear. Well, this brings up another question go with a 5.4 or a 5.6??? I wonder if I should round up or down? hmmmmm??? :)

[ November 18, 2001: Message edited by: Jason Williams ]


Plan on any weight gain or weight loss diets in your future?

If I had to gamble and I was in your shoes, I'd go w/ the 5.4. They call me "Mr. Vegas"* and I just love to gamble.

* John Candy in "Stripes".

I just took a 5.4 spring off my YZ426 yesterday (5.4 is stock on a YZ) I replaced it with a lighter 5.2 since I am only 168lbs! Later,


Always in need of a diet :) but I am thinking I will go with the 5.4 and see!!! Maybe that will give the diet motivation that I need. If I buy a 100$ spring and I can't take it back. :D Thanks for the help


Garret, would you be willing to part with your 5.4? Email me and let me know. I'd like to get one before Thanksgiving. Don't know how we could do it but let me know. Maybe you could use the 5.0 that I have if the 5.2 is still to stiff


[ November 18, 2001: Message edited by: Jason Williams ]

[ November 18, 2001: Message edited by: Jason Williams ]

i think michael is spot on. i weigh 14 stone. ok, ok thats 196lb to you.

i use my bike predominantly to race but even when i green lane it; i find it great unless i decide that i really can sit through that 40mph roller coaster!

i have a 5.5 K-tech spring and the back end went whap-whap-whap on corners under hard throttle coming out. i tried one or two damping positions and in the end took the spring preload to 250mm from a free length of 270mm. according to the Yam charts on 7-19 the minumum preload should be 252mm.

at last i'm happy with it at just below the minimum.

i think that 5.6 would be good for any form of racing, MX type stuff.


Well I blue labeled a 5.6 today from Race tech, They also recommended the 5.6 at a lower preload. I ride mostly all woods, roots and rocks and lots of mud :) I'm not much on jumping anymore. Spring should be here on Wednesday.

Reassemble Thurs am, Turkey Thurs Pm. Ride on Fri I will let you know how she feels.

Thanks for the comments

Cheers :D


Keep us updated on the spring swap Jason. I'm curious to hear your impression. Thanks.


If you ride at all aggressively, consider the 5.6. I had a 5.4 and switched to a 5.6 and found that it didn't require excessive preload to set the sag (we're in about the weight class - the doctor's chart for ideal weights said I should to be about 7'5" tall).

The YZ comes with the 5.4 stock (as has been pointed out) and I think they sized it for a 170 lbs novice rider.

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