Suspension set up for 2005 yz 125

Hi,
The weigh is 87 kilos.
Alex

my 450 manual has different settings for EU USA an AUS out of 20 clicks between 10-14 out. so the best place to start is count the maximum clicks, and start in the middle, move a couple of clicks at a time and keep notes as its easy to forget. seat should compress about 80-100mm when you sit on it, but will depend on preference,track,mx, enduro etc try and get original manual from last owner

adjusting your shock depends on where you intend to ride the bike. You are smaller so I would recommend setting you shock on the weaker side of medium on a mono shock for trail riding with jumps and woops. You'll need some rebound even as light as you are. If your front had adjustable tube pressure make sure it is the same unless in sand and stiffen it up some then.

When I get stuck or want to set up the suspension settings on any MX bike(Ive owned about 20 different types) I adjust all the settings in the middle of the range & fine tune the adjustments from there.Screw the adjusters all the way in.As you unscrew them count the clicks untill all the way out.Now go back in to the half way point(counting the clicks as you go). This will give you a starting point. Typically most MX'ers factory suspension settings eill be one or two clicks in or out of the middle position so as to offer you plenty of adjustment either way.
The only setting that this dosn't apply to is the spring pre-load but you can usually tell if it has been adjusted by the adjusting(castle type)nuts. This applies to rear shock preload only.
Hope this helps.
Regards Andrew Porrelli

You need to start with the spring sag. You need of 3 inches of sag front and rear with you on it and all of your riding gear on. you will need a friends help to measure for you.

hi lilsilence, thank you for using fixya. below is a line from dirtrider.com, answered the same question for a 2003 which is the intro for speed sensitive suspension.

Several ways to go here. Remove half of the fluid in each fork and addback a 10wt. This will approximate a 7.5wt. Going to a 10wt. willreduce bottoming but will give you some harshness. Depending on yourweight and riding style it is difficult to give you proper advice, justgeneralities.
I use ATF fluid. I'm valved for wood and light MX, stock springs, and Iweigh 155 lbs. ATF is cheap and is something simular to 7.5wt. I'm noexpert and my explanation might not hold water but it works for me.

Mobil1 Synthetic ATF is a very popular fluid that will probably be the weight you want.

Seems to me that I can make much more difference in the action bychanging the fluid levels. If you mix up riding between track andtrail, you may want to consider sub-tanks.

Draw out half of the fluid with a piece of tubing attached to a saryngeand put back an equal amount of 10wt. Adjust the level from there tosuit your comfort.
Sub-tanks give a greater amount of adjustability and plushness. Pricey but do the trick when properly set up.

http://www.dirtrider.net/forums3/showthread.php?t=159185

I have use close to the same method on my rm250 and have worked for me, i sure hope it will help you out in another way.

if you have other question, please let us know.

regards,

voodoo