Jump to content
Sign in to follow this  

SFF off-road settings RMZ250

Recommended Posts

Hi.. Going to try these settings for off-road , for a 60kg rider of average speed looking for better single track /rocks & roots

Comp

0.84kg/mm 2mm preload

300ml LHS

320ml RHS

Comp

32/020(4)

24/010

31/015

29/015

27/015

25/015

23/015

21/015

18/015

17/015

Mid valve

24/01

26/015

26/015

21/01

26/015

26/015

26/015

26/015

24/015

21/01

(Float 0.35)

Reb

14/01

15/01

16/01

18/01

20/01

22/01

24/01

26/01(7)

Rear shock valving has standard settings with 5.0kg/mm spring

100mm rider sag

Any ideas or observations??

Sent from my iPhone using Thumper Talk

Edited by KBRPKENNY

Share this post


Link to post
Share on other sites

More float and softer base and your springs still look stiff

Share this post


Link to post
Share on other sites

32/020(4)
31/015
30.10
28.10
26.10
24.10
22.10

20.10

18.10

midvalve

26.15x6

17.10x5

drill1.5bleed hole in midvalve

reb oem.

add 5mm preload on ics spring

and use 0.92kg spring with oem tube cut 4mm

oil level 

330spring side 

230 damp side

Share this post


Link to post
Share on other sites

Thanks for your replies...

A couple of questions/observations

Firstly oil volume in the left hand side damper leg.. I noticed the Kawasaki spec is 230ish ml , but the Suzuki spec is over 300?? Are the cartridge sizes the same? Is the purpose of the lower volume to lessen the secondary spring rate because these forks are too progressive?? Causing high speed deflection??

Do you feel more dampening/spring force is nessesary on the initial travel?? And less further in the travel??

My inclusion of a bleed shim on the mid valve stack is to help the fork feel smoother from comp to reb stroke, the rather large 1.5mm bleed would achieve similar results??

The mid valve spec that has been recommended...

26x015 (6)

17x010(5)

Are any of the original "backer shims" after the 2.65 mm spacer retained??

Is the float figure 0.0mm as I have calculated it to be with the above shim spec ??

I will test my settings but I'm keen to try your recommendation !!

BTW the rider is a female , top five in aust off-road scene, 60kgs with her gear

Cheers Kenny

Sent from my iPhone using Thumper Talk

Share this post


Link to post
Share on other sites

yes , sorry i use 0.25 float and i make taper the washer of midvalve with lathe , cause oem shim hit washer on high speed.

about damping i use 230 -330 on suzuki and kxf is the best combination i found.

bleed hole on midvalve is a must have.

about spring rate 0.92 is the same of 046 on normal showa fork.

if u use soft spring u need a stiff valving, if u use 0.92 spring u can use a little soft valving and bike dont dive under braking

  • Like 1

Share this post


Link to post
Share on other sites

She's actually 60kg in gear so maybe 55 kg without ? I weigh 70 kg and use 0.43

Share this post


Link to post
Share on other sites

 

oil level 

330spring side 

230 damp side

 

so you do it vice versa?

 

stock KX250F '14 is

223cc R (spring side)

300cc L (damping side)

 

just curious...

Share this post


Link to post
Share on other sites

yes i did viceversa , and i found is better , also less wear on spring side.,.

about spring marcus my fast rider is 68kg and run 0.98 on sff.

i think for 60kg 0.45 0.46 are good on 4stroke

Share this post


Link to post
Share on other sites

Wow that's stiff , always good to see different approaches Ali :-)

Share this post


Link to post
Share on other sites

I got a Brit champ rider 63kg he on 8.4 and 45nm and they bit stiff really, static is really high.

Share this post


Link to post
Share on other sites

I got a Brit champ rider 63kg he on 8.4 and 45nm and they bit stiff really, static is really high.

How much spring preload you use ?

Share this post


Link to post
Share on other sites

very different setup , here 90% of rider run 8-10mm preload on normal showa and kayaba fork!!

on sff i run 6-8 click from full out on oem  tube. but for many rider i cut 3-5mm on preload tube and centering preload clicker setting

Share this post


Link to post
Share on other sites

When 2013 kxf first come out, we couldn't get fork springs in uk, I got a spring from a company , was longer than std. Ended up with 10mm of preload. Was for a pro level rider, he said it deflected off smaller bumps. We needed to use it till we could get the right weight and length springs.

Share this post


Link to post
Share on other sites

i use sff on my crf and i swap many time showa tc47 to sff 47 for test, i ride stiffer spring on sff then on tc cause the damping side on sff work better if is softner. if u run little float on sff cartdrige a lot of cavitation coming, thats why i use preload on ics , if u run soft spring and stiff valving need using high pressure seal on cartdrige.the combo about stack stiff and oil level i found is the best compromise for me, i was testing and comparing sff on my bike from 8 month , and i was riding tc47 on my bike from 2007. im a SUSPENSION TUNER and i tested a lot of stack on tc 47,was the best fork i ridden ever at time but on sff what i suggest u is what i think is the best for you. a good starting point

  • Like 1

Share this post


Link to post
Share on other sites

Tested today with my setting .. Improvement in traction and comfort in most areas., good bottoming resistance.

Added preload to fork(6 clicks) and backed comp clicker to 13 clicks out.

Fork action harsh on roots with a hint of deflection...

Yes I will be changing to 0.10mm shims & drilling the bleed hole !!

Thanks for your recommendations

Sent from my iPhone using Thumper Talk

  • Like 1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

Sign in to follow this  

×
×
  • Create New...