Suspension Help

yamahuh
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79
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4/1/2008
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US
Edited Date/Time 6/19/2015 3:28am
I have an 06 YZ125 that I put YZ250 springs on (I weigh 190). I have recently rebuilt the forks.

In rolling whoops the bike uses too much travel, when skipping/wheeling to the next whoop the suspension will bottom, same for landing off big jumps. The bottoming isn't teeth rattling, but it shouldn't be using all the stroke for smooth downside landings.

Increasing the compression helped some but seems to really have a negative effect on braking/chatter bumps. I have not adjusted the high-speed compression on the shock as I'm not really sure what designates high speed.

Given my weight and speed (C class) I'm thinking about a revalve but don't want to toss $700 if I don't have to...ideas???
Thanks,
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CarlinoJoeVideo
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Portland/Los Angeles, CA US
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6/15/2015 6:57am Edited Date/Time 6/15/2015 8:49am
Sorry, here's an edit:

Are you adjusting the nut or the screw? High speed bumps are actions that make the shock react very fast like chatter bumps, square edge bumps, where low speed are ones that are slower like rollers and jump faces.

The nut is high speed, the flat head screw driver is low speed.

arvid
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2/23/2014
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SE
6/15/2015 7:01am
The nut is high speed. screw is iow speed..
arvid
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2/23/2014
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SE
6/15/2015 7:06am
i think you need stiffer springs in forks too.
Paw Paw 271
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Benton, LA US
6/15/2015 7:34am
Just putting 250 springs in your bike will not make the spring rates correct for your weight. Go and check the spring rates for your bike at racetech.com.

Paw Paw

The Shop

Eddie_E
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4/23/2013
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Framingham, MA US
6/16/2015 8:40am Edited Date/Time 6/16/2015 8:41am
You need a 5.3.(Racetech or FC) rear spring or a 5.5 (diversity), not a 4.9 from a yz250. The Yz250F's came with the 5.3 some years. you also need .45 fork springs or 375cc oil.
FGR01
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AZ US
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6/16/2015 10:25am
What year YZ250 did the springs come from? I ask because they changed slightly over the years. The springs from my 2006 YZ250 work perfect for me (170 lbs) in my 2006 YZ125. I think the YZ250 fork springs got bumped up to .44 in 2008 or so.

Basically I agree with Eddie. You probably need stiffer springs. I don't recommend doing the 375cc of oil. Stick with the stock 355cc and get the correct springs.
yamahuh
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79
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4/1/2008
Location
US
6/16/2015 5:58pm
I think your're right, springs are needed. Thanks
markit
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1/10/2013
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Bogalusa, LA US
6/19/2015 3:28am
Set your sag front and rear.

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