Suspension Help


9 replies to this topic
  • ROB450F

Posted February 07, 2010 - 06:52 AM

#1

Recently brought a 06 yz450, the guy i bought it off was atleast 110-130kg
and the bike just feels wrong, soft, unstable and loooosseee!! :ride:
havent really got much experience with ride setups as my last bike just felt stable from the day i bought it.
is there any starting point i can go from rather then back to standard specs.
im 95KG (with riding gear) and 1.8m tall.
any help appreciated

Cheers
Rob
:lol:

Edited by ROB450F, February 09, 2010 - 06:39 AM.


  • grayracer513

Posted February 07, 2010 - 09:32 AM

#2

Do you know if he ever changed the springs from stock? At your weight (209 pounds), you're a bit heavy for the stock springing yourself, especially if that's your weight without your riding gear.

  • ROB450F

Posted February 07, 2010 - 09:39 AM

#3

not sure if it has been changed, been reading the owners manual about settings etc, how can i tell if it's an original or not? should i be looking at a stiffer spring?
95kg is with riding gear, the bike has alot of sag n sits pretty low then plus my weight it seems a bit soft and not much return strenght


cheers
rob

  • grayracer513

Posted February 07, 2010 - 09:43 AM

#4

Try doing these two things in order:

1: http://www.tootechra...ension_tips.htm

2: http://www.tootechra...pension Tip.htm

  • ROB450F

Posted February 07, 2010 - 10:30 AM

#5

thanks mate! there a great help interesting to see if ive even got the right spring.
another quick question with sprocket ratio's, i mostly ride trails and the bike feels "laggy" in low rpm 3rd gear, and a bit short in second so im continously shifting from 2nd to 3rd, i;ve been told to try 14/47 set up? wats your thoughts? there standard sprockets atm.


cheers
rob

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  • grayracer513

Posted February 07, 2010 - 12:59 PM

#6

Stock gearing is 13/49, and for a lot of people, that works pretty well in a wide variety of circumstances. You might go to something lower, like a 13/51 or 52 if most of your riding is really low speed stuff. 14/47 would be like locking the bike out of low gear. Might work for super moto, but certainly the wrong approach for trail riding.

  • ROB450F

Posted February 07, 2010 - 05:13 PM

#7

ok thanks mate, good to get some advice off someone who knows wat their talking about

thanks again.

  • ROB450F

Posted February 09, 2010 - 04:45 AM

#8

ok just a quick follow up, to see if i understood correctly

Race sag;
bike on centre stand: 630mm
rider on bike: 525mm
sag: 105mm (which indicates that is good??)

Should i lower this to 95mm to make the bike turn sharper?

Spring rate:
bike on center stand: 630mm
bike free standing: 600mm
sag: 30mm (which indicates that is the right spring rating?)This is also 1mm within guide lines should i change the spring?



Also how about front suspention setting are there any guid lines for them
i found some on the website above just wonder is they suit trail riding?


cheers
Rob
:ride:

  • ROB450F

Posted February 09, 2010 - 04:53 AM

#9

also the sprockets are 14/49 would changing it to 13/49 make a big impact??



cheers
rob
:ride:

  • grayracer513

Posted February 09, 2010 - 09:18 AM

#10

also the sprockets are 14/49 would changing it to 13/49 make a big impact??

Major. 1 tooth at the front is roughly equal to 3 at the rear with sprockets in that size range:

49/13=3.77:1

52/14=3.71:1

(49/14=3.5:1)

The stock suspension settings are listed in the manual. A suspension set up guide is here:
http://motoman393.th...suspension.html

All of the links I've posted here, and one to download manuals are in the Common Threads Sticky.





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