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  #1  
Old 12-14-2003, 07:52 AM
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Default Having a shop adjust or do-it-yourself

     

Motoman, Shocknut & Ranger: I race a 02 YZF250, I am a 38 year old, 5'6", 160lbs, 1 year racing experience and first dirtbike.
I rode the beginner class all year only jumping singles and tabletops. I am going to move to the novice class or veterans class next year. Finally the question is: Should I pay alot of money to have a shop redo and adjust my suspension or attempt to do it myself? Also will a shop take the time to really explain show me how to adjust and understand the suspension? What would you change on a stock suspension first with my experience(lack of)? Even with my lack of experience I know that a proper suspension gives you more confidence in jumping. Thank You....
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  #2  
Old 12-14-2003, 07:56 AM
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Default Re: Having a shop adjust or do-it-yourself

well i could answer your question, but since you left me out then tuff nookie
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Old 12-14-2003, 08:02 AM
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Default Re: Having a shop adjust or do-it-yourself

well i guess i wll anyhow )
do you have your sag set?
setting your race and static sag will determine if you need new springs. a spring swap you can surely do yourself. next would be to set your clickers. this is also a self done job. after that would be a revalve. this should be done by a shop. wether or not you NEED a revalve is arguable. try setting your sag and clickers first.
you know how to do these?
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Old 12-14-2003, 08:13 AM
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Default Re: Having a shop adjust or do-it-yourself

Yardpro, as always, gives good advise. there are some items you can do yourself to make your bike act alot better.

How much do you weigh? Does your bike have stock springs?
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Old 12-14-2003, 08:37 AM
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Default Re: Having a shop adjust or do-it-yourself

uh, jim,
finish your coffee first. he is 160# (line two of his posts)

the statement that i give good advise, however, is dead on.

BTW, good morning sunshine
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Old 12-14-2003, 09:45 AM
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Default Re: Having a shop adjust or do-it-yourself

lol you are right, I was on my first cup of coffee, should never post before finishing it.

You are at the edge of the stock springs, I would think that a step up may be in order, try and set your sag first and if you can achieve the correct amount of race sag and still have the correct amount of static sag then you should be ok.
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Old 12-14-2003, 09:50 AM
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Default Re: Having a shop adjust or do-it-yourself

a local tuner here is putting softer fork springs in almost every 426 he does. he says they come way too stiff stock. anybody else hear anything about this?
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Old 12-14-2003, 09:52 AM
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Default Re: Having a shop adjust or do-it-yourself

Your manual can help you out with that stuff.
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Old 12-14-2003, 10:01 AM
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Default Re: Having a shop adjust or do-it-yourself

Right, but he is riding a 250f YP. Better have another cup of coffee.
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Old 12-14-2003, 10:02 AM
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Default Re: Having a shop adjust or do-it-yourself

160 sounds about right for the stock springs. Usually 125 class bikes are made for 145-165 lb riders.

Has the fork and shock fluid ever been changed since the bike was new? If not, change it before you start tuning. Motorex is a good over the counter fluid. Use 5wt in the forks. Also, the fork bushings may need to be replaced (1yr is around their useful life). If the bushings are worn, then your forks will feel harsher on smaller bumps.

Once you get fresh fluid, and fresh bushings/seals if they are worn, then you can start tuning. Start with the race sag at about 95mm and set the clickers to factory positions.

I'll leave you to a tuning guide that has already been written up, but remember that the shock rebound also affects compression to a degree.
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  #11  
Old 12-14-2003, 10:03 AM
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Default Re: Having a shop adjust or do-it-yourself

http://www.mx-tech.com/tuning.asp
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  #12  
Old 12-14-2003, 10:44 AM
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Default Re: Having a shop adjust or do-it-yourself

Quote:
Originally posted by MotoMan
Right, but he is riding a 250f YP. Better have another cup of coffee.
lol
guess two cups are not enough.
thanks for steering me in the right direction. if it were a few hours later, i could blame it on the beers
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  #13  
Old 12-14-2003, 11:24 AM
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Default Re: Having a shop adjust or do-it-yourself

Thanks for the advise guys, but I guess I better find a book or manual that describes in detail sag and static sag. I had someone show me once but then he lost me when he was saying if you adjust one then go back and adjust the other. I guess my question should have been: Would a suspension shop walk me through everything if I have them do the work?
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Old 12-14-2003, 11:31 AM
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Default Re: Having a shop adjust or do-it-yourself

never fear, yardpro is here:

to get your sag here's the scoop

put your bike on a stand, measure from the rear axle nut to a point on the fender. then in full gear get on the bike and bounce up and down. let the bike settle. have a helper help to hole you up and remeasure the same two points.

the difference should be 100 mm (4")

if it is less then losten the top spanner nut on the shock spring. if it is more then tighten it.

once you have the 100 mm,
then check static sag.
this is the difference from the bike on a stand, and then the bike on the ground by itself. this should be 25 ish mm. this it what determines if you need a stiffer spring. if you have less than the 25mm then you need a stiffer spring.
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  #15  
Old 12-14-2003, 02:25 PM
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Default Re: Having a shop adjust or do-it-yourself

Toledo huh me too. Do you race at Delta?
I could help you out butt you have
more experence then me. I To
am old like you(34) and very new to
dirtbikes. maybe we can go riding
together some day
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  #16  
Old 12-14-2003, 03:28 PM
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Default Re: Having a shop adjust or do-it-yourself

Good explaination YP, the beer works better then the coffee.
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  #17  
Old 12-14-2003, 08:09 PM
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Default Re: Having a shop adjust or do-it-yourself

Although YP did an excellent job explaining sag, a picture is worth a thousand words.

Check this link and it should help you --> Pro-Action Setup Guide
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  #18  
Old 12-14-2003, 08:12 PM
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Default Re: Having a shop adjust or do-it-yourself

showoff
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  #19  
Old 12-14-2003, 08:14 PM
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Default Re: Having a shop adjust or do-it-yourself

Yeah I know...
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  #20  
Old 12-14-2003, 08:25 PM
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Default Re: Having a shop adjust or do-it-yourself

Thanks Woody, I saved the link..........
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