Posts
111
Joined
6/19/2021
Location
Osceola, WI, USA
Edited Date/Time
10/25/2022 9:49am
I have about 12 hours on my new to me 2019 yz250f (~60 total hours) and I can't the shock to cooperate. I have spent many hours trying to tune my suspension, but I can't get the rear end to not feel very harsh. Forks feel ok, apart from being able to feel every breaking bump.
I'm thinking I need to go softer on the springs. I weigh 150, and probably a top C rider (never raced but if I had to guess). Previous owner who bought the bike says it has stock springs.
My shock lock rings have to be backed 99% of the way off in order for me to get 100mm sag with ~52mm of static sag. Does this indicate I have too stiff of a rear spring?
Is there any easy way to tell if my fork springs are too stiff as well? I have a hard time telling if my suspension is actually too soft and just blowing through the stroke, but my forks and shock both feel very plush on overjumps and never bottom.
I'm thinking I need to go softer on the springs. I weigh 150, and probably a top C rider (never raced but if I had to guess). Previous owner who bought the bike says it has stock springs.
My shock lock rings have to be backed 99% of the way off in order for me to get 100mm sag with ~52mm of static sag. Does this indicate I have too stiff of a rear spring?
Is there any easy way to tell if my fork springs are too stiff as well? I have a hard time telling if my suspension is actually too soft and just blowing through the stroke, but my forks and shock both feel very plush on overjumps and never bottom.
It sounds like your bike is probably a little stiff on the spring rates. If the shock has not been rebuilt yet, that would be a good next step. Just follow the guides online and replace your seals while you're at it. You can probably rebuild that shock for $50, maybe less. I would go one rate stiffer than these on the forks, just because I think RT typically trends softer on forks, but I like mine stiff.
.44 Fork springs, 5.3 shock - though I dont remember if anyone makes a 5.3 (5.2 for soft, 5.4 for stiffer).
Put a zip-tie around your fork leg and go ride. It should be about 1.5-2" from bottoming out after a moto assuming you dont OJ or case anything.
If you have 52mm of static sag, but rider sag is 100mm with supposedly stock rates with a 150lb rider. Something isn't right. Static sag should be around 30-40mm.
Also if you never bottom on OJ or hard hits. Chances are those are not the stock rates. With the collars back all the way off, you should have lots of static and rider sag.
Make sure your forks aren't binding.
As mentioned above, make sure your front wheel has been installed properly so that the forks are not binding, there are videos on YouTube showing how to do this.
I would imagine a 250f should work pretty well for a 150lb rider, especially the Yamaha, something seems a little off to me
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Lower shock bearing on any YZ needs lots of attention paid to it.
You said you've spent hours trying to tune the suspension. What exactly does that mean??
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