Im new to suspension so please bear with me....

Joined
May 15, 2000
Messages
53
Likes
0
#1
I own a 00CR250 and I am 6'5 250lbs. I ride on stock suspension and I need some help setting it up for me. I know that I am way above the target weight for this bike but I need some better setttings. The clickers are at stock settings, can yall give me some advice on what I should do to make it stiffer, and more resistance? I come off a 89KX125 so no matter how bad the suspension cannot feel harsh to me, so give me any advice, although I am limited if it requires any dissasembly.

Thanks for your time,
Irish MXer
00'CR250
 
Joined
Oct 21, 2000
Messages
13
Likes
0
#2
If you want to get it anywhere near good, you _will_ need stiffer springs. If you want to do your best with what you have, first set sag (many threads on this forum, you will have to put more preload on the spring than is healthy).

You also want to increase compression damping, I think you have the fork compression at the bottom of the forks (screws), so screw them in a whole bunch of clicks (about 5 to start with), and the compression on top of the rear shock reservoir. Screw in the large nut-like thing at least half a turn and the screw in the middle again a lot of clicks.

The suspension is NOT meant for a 250 lbs. guy. To get it somewhere perfect you will need a revalve in addition to the stiffer springs.

All in my opinion, of course.
 
Joined
May 15, 2000
Messages
53
Likes
0
#3
Like I said I am a suspension newbie. I dont really have any problems with the fork, I am just looking to ajust the rear, I dont know how many clicks I should turn the screw on my suspension, I dont really know what it does except make it a little stiffer when I turn it clockwise. Any help would be appricated.

Irish MXer
00'CR250
 

JTT

Subscriber
Joined
Aug 25, 2000
Messages
1,407
Likes
0
#4
I agree with avlehtine, you will definitely need springs, I am 190lbs and I had to go stiffer on both ends of my '00 CR250. You will find that the ride is MUCH more plush with the right spring.

As for settings, the small screw on the top of the shock is the Low speed compression, the larger, hex nut in the same place is the High speed adjuster, the rebound is located at the bottom of shock (down by linkage). Check out Jer's site (MX Tech) for tunig details, it's quite good, at least to get you started.

JTT

ps. You can turn the screw as much as you want, and should, you can always return it to original position.
 
Joined
May 15, 2000
Messages
53
Likes
0
#5
Thanks for the help JTT, I will look into stiffer springs, How much will that end up costing me? Also wich company offers springs for someone as big as me? I have a feeling this will be like bubba needing ford light truck springs
I see all these differnt rates, wich one is right for me?
Thanks guys,

Irish MXer
00'CR250
 
Joined
Dec 30, 2000
Messages
70
Likes
0
#6
Irish MXer,
I would recommend .47 to .48 for the front and 5.4 to 5.6 for the rear

Rob Mann
 
Joined
May 15, 2000
Messages
53
Likes
0
#7
Thanks rob, How much am I looking at to have my local shop do this for me? If I do the back spring will it effect the way the bike acts in the air? Will I want the front redone after the back? Wich is more important?

------------------
Irish MXer
Mike McCasland
00'CR250
 
Joined
Dec 30, 2000
Messages
70
Likes
0
#8
Irish MXer ,
You should contact your local dealer and they should be able to give you a accuate price to install the fork springs, the rear you should be able to do yourself. In your case I would do both at the same time, to keep the bike balanced.


------------------
Good Luck
Rob Mann
 

Jeremy Wilkey

Owner, MX-Tech
Joined
Jan 28, 2000
Messages
1,453
Likes
0
#9
Irish,
.48 is too light. I would go with a .50 and the 5.8 in the rear.(Your a big guy and you will need that rear spring to keep the extra weight (That will be placed farther back on the bike up.) Get what you need the first time and you will be happier for it!
Regards,
Jer
 
Joined
Dec 30, 2000
Messages
70
Likes
0
#10
Jer,
What weight do you consider the stock springs good for?
Also would you consider .01 kg/lb a good estimate for the slope of a rear spring curve? If not then what do you consider a good estimate.
 

Jeremy Wilkey

Owner, MX-Tech
Joined
Jan 28, 2000
Messages
1,453
Likes
0
#11
Rob,
Are you laying in the weeds trying to prove your big "engineering Degree".??. Nice...
I don't even know why I waste my time..

As for the slope, the linkage on a CR requires a .008 slope. I'll let you put your engineering skills to work so you can do the math...(Simple y=mx+B )will work but point slope form is handy)O yeah I add .2kg/mm for a rider over 6 foot 2 inches..

Have a good one!

Regards,
Jer
 

yzguy15

Sprayin tha game
N. Texas SP
Joined
Oct 27, 2000
Messages
1,271
Likes
0
#12
Can you guys please stop fighting? I like it here with two suspension experts. Both of you know your stuff. BTW, those formulas aren't stuff you learn in Engineering, that's just algebra (I learned it last year).

Now to my real question. If I'm 5'10" and 210lbs., do I need stiffer springs? Also I'll throw this curve in at ya: I like my suspension a little softer since I only ride in the woods and don't jump much. Does this factor into your response? and Does that mean that I need to change my springs at all?
 
Joined
Dec 30, 2000
Messages
70
Likes
0
#13
Jer,
I just wanted to see what your reasoning was that he needed a 5.8 thats all, my curve has a slope of .0065 but for quick and dirty calculations I use .01, I just think that 5.8 will be to stiff.

Rob Mann
 

Jeremy Wilkey

Owner, MX-Tech
Joined
Jan 28, 2000
Messages
1,453
Likes
0
#14
YZGuy 15,
Its called sarcasm SP and my collogue should have more than that comming.. I really have tried to be nice, evry now and then I rise to the bait and join on the mud throwing band wagon as he so despertly needs me to ....

Anyway yes your questions, I would change to a set of .44's and a 5.0 for your rear.. Springs have little impact on plushness my freind so you will not exsperice harsh suspension for that reason... My server timed out so I don't know if you included your ht..
Regards,
Jer