Static and rider sag?
 

Any tips on rider sag for setting up preload?? Just had new springs, oil and damper valves fitted to the front forks by Teknik Motorsport and a new Yacugar rear shock.
Had a search but can't find sag measurements in the manual or in the forum using search. Rear travel is 200 and front 210 so using the 1/3 rule I would guess a starting point for rider sag to be about 70mm from full droop... Any other recommendations??

Once I have this sorted I can then start playing with rebound dampening on the new rear.

Only got a week to get everything sorted after heaps of maintenance...
New suspension
Grease swing arm
Cush hub 21mm bearing and new cush rubbers ($44 genuine from yamaha)
Tusk folding rear brake toe and brake snake
YZF front guard/fender
New wheel bearings
Modified db 1/2 killer for the Barrett single
Spot tracker mounted
All this prior to a three-day ride on the 19th -21st MOA- Kalbarri- Perth if interested prob about 1500 km 40/60 dirt bitumen.
Matt

The actual numbers will vary from rider to rider and setup is in the end all down to personal preference. I�ve found that experimentation is the only way to get it right (I�ve even experimented with both linear and progressive springs at great expense!) However, 1/3 rider/dynamic sag is definitely a really good starting point � work from there.

FWIW, I have a similar suspension setup to you (well at the rear anyway). I am a fairly lightweight 85Kg (in full riding gear). For reference, here�s what I found works�

With Ohlins 60N linear springs in the front I have the preload adjusters set flush on the fork caps giving 70mm of rider sag and 30mm static sag. I have also bought some Teknik valves, but I�m waiting for the cold dark winter nights to fit them.

At the rear (and the front for that matter) I found that to get a progressive spring to work properly you have to err on the side of choosing a higher range of spring rates. With all progressive springs you tend to have to add too much preload to get the static sag right, but as a result you then end up with too little rider sag as you�re effectively squashing out the �soft� part of the spring and going into the high rate part of the spring earlier. Unlike a linear spring, which has the same rate whatever preload you dial in, a progressive spring increases in spring rate the more preload you add, which can cause harshness. Forget about static sag with progressives, and concentrate on getting the dynamic/rider sag right. The key point is to use the minimum amount of preload you can get away with on a progressive, so the spring can react quicker and use its full range of rate/travel and you can maximise the benefits of the �soft� portion of the spring.

Anyway, on the shock I have 10mm of preload (65mm rider sag) set on my Yacugar shock, and I don�t find that you need to add preload when you add luggage/extra weight as the springs progression in rate deals with the extra load. I see that as the main bonus of a progressively sprung shock � less fiddling about with preload with constantly changing loads. I�ve ended up sticking to the suggested 20 clicks out from closed on the rebound after trying everything from +10 to +30.

One tip I can give with the Yacugar shock is to either tape over, or put a blob of Blu-tak in the recess where the grub screw sits in the preload adjuster ring as it gets filled with crud which makes it a nightmare to get the tiny allen key in.

Sounds like a good trip - have fun!

Awesome response cheers!

I ended up with the fork preload adjusters dead flush which gave me 65mm of sag with my un kitted 100kg self!
Rear I didn't even adjust as I got 60mm again with just me and no panniers or fuel so I think loaded I will be sweet. Very happy with this as a starting point anyway.

Only got a quick 10 min run and definitely feels awesome, can't wait for the trip with both long cruising and offroad sections! Can't believe how good the shifts feel with a tight cush hub hope it last with the larger bearing fitted.

This morning...no suspension...
http://i317.photobucket.com/albums/m...psjweq9szs.jpg
This arvo.....
http://i317.photobucket.com/albums/m...psbchfdacy.jpg
New toe and snake....
http://i317.photobucket.com/albums/m...psvgfo4pga.jpg

Shake out run loaded!! More than happy, I'm stoked, rides like dream!

http://i317.photobucket.com/albums/m...pse1pcmo4e.jpg
http://i317.photobucket.com/albums/m...ps7n1mjy7s.jpg
http://i317.photobucket.com/albums/m...pslm6hrggx.jpg

Good to hear.:toothy12:

One other thing a failed to mention about the Yacugar shock, is that it handily has a rubber O-ring on the piston rod so as you can check how much travel you're using (saves using a cable tie). Slide it up to the top, and while you're travelling you can check you are using the full range of stroke for the load you've got and adjust as necessary.