2013 kx250f forks way to stiff


18 replies to this topic
  • angstroma2004

Posted March 31, 2013 - 05:14 PM

#1

Anyone finding that the forks in this bike are very harsh and stiff. I'm 160 Mid pack C rider in have the preload backed all the way out and the forks still seem way too stiff does anyone have some suggestions?

  • dmm698

Posted March 31, 2013 - 05:37 PM

#2

How many hours do you have on the bike since it rolled off the dealer floor? At a C pace, your probably going to be looking anywhere from 5-10 hours until the forks break in entirely and THEN they will be softer/plusher.

  • angstroma2004

Posted March 31, 2013 - 05:44 PM

#3

25 hours on the bike

  • dmm698

Posted March 31, 2013 - 07:00 PM

#4

How many clicks out are you on compression/rebound (out from full hard)?

  • jonbobcar

Posted March 31, 2013 - 07:56 PM

#5

Dirt Rider said the same thing in their 2013 250 shootout.

  • osheen

Posted March 31, 2013 - 09:48 PM

#6

I weigh 168 lbs. I put kaw's optional soft spring in mine. Also, one notch softer rear spring. Much better now,,,,

  • robw122

Posted April 01, 2013 - 03:48 PM

#7

Anyone finding that the forks in this bike are very harsh and stiff. I'm 160 Mid pack C rider in have the preload backed all the way out and the forks still seem way too stiff does anyone have some suggestions?

I'm 180 with gear and a C rider too. Sent both ends to WER for a revalve and respring. best money I spent on the bike. I also used the optional softer kaw fork spring and one size softer on the rear. even backed all the way out on all of the adjustments I hated the forks. do yourself a favor and make sure you don't have the front end bound up as well. tighten the axle, loosen the pinch bolts, pump the forks a few times, retighten the pinch bolts. mine was cocked from the dealership and I had about 4" of travel before the forks stopped.

  • angstroma2004

Posted April 01, 2013 - 04:51 PM

#8

They are not bound up they move the whole travel just stiff as hell I will try the lighter springs love the bike but the front end is terrible

  • spin05

Posted April 01, 2013 - 05:01 PM

#9

They are not bound up they move the whole travel just stiff as hell I will try the lighter springs love the bike but the front end is terrible


Yea at 160 your definitly a bit too light for stock springs.

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  • slowoldfart

Posted April 01, 2013 - 06:13 PM

#10

Here is what Kawasaki show for spring
I have two 2012 kx250f one bike is soft and one is just right???
I guess I will take them apart and find out what they measure
front 2011
44026 44026-0152 SPRING-FRONT FORK,K=9.1N/MM stock
44026A 44026-0156 SPRING-FRONT FORK,K=8.7N/MM
44026B 44026-0157 SPRING-FRONT FORK,K=9.5N/MM

front 2012
44026 44026-0152 SPRING-FRONT FORK,K=9.1N/MM
44026A 44026-0157 SPRING-FRONT FORK,K=9.5N/MM stock
44026B 44026-0166 SPRING-FRONT FORK,K=9.9N/MM

front 2013
44026 44026-0168 SPRING-FRONT FORK,K=9.4N/MM stock
44026A 44026-0175 SPRING-FRONT FORK,K=9.0N/MM
44026B 44026-0176 SPRING-FRONT FORK,K=9.8N/MM


rear 2011
92145 92145-0465-10 SPRING,REAR SHOCK,K=49N/MM,BLK
92145A 92145-0887-10 SPRING,REAR SHOCK,K=53N/MM,BLK
92145B 92145-0888-10 SPRING,REAR SHOCK,K=51N/MM,BLK stock
92145C 92145-0889-10 SPRING,REAR SHOCK,K=55N/MM,BLK


rear 2012
92145 92145-0465-10 SPRING,REAR SHOCK,K=49N/MM,BLK
92145A 92145-0887-10 SPRING,REAR SHOCK,K=53N/MM,BLK stock
92145B 92145-0888-10 SPRING,REAR SHOCK,K=51N/MM,BLK
92145C 92145-0889-10 SPRING,REAR SHOCK,K=55N/MM,BLK



rear 2013
92145 92145-0465-10 SPRING,REAR SHOCK,K=49N/MM,BLK
92145A 92145-0887-10 SPRING,REAR SHOCK,K=53N/MM,BLK stock
92145B 92145-0888-10 SPRING,REAR SHOCK,K=51N/MM,BLK
92145C 92145-0889-10 SPRING,REAR SHOCK,K=55N/MM,BLK

  • angstroma2004

Posted April 02, 2013 - 05:48 AM

#11

Just ordered the 5.0 rear spring and 8.9 front should be a lot softer

  • dmm698

Posted April 02, 2013 - 05:57 PM

#12

Out of curiosity what are you at the on the spring preload? Even with a revalve craig at enzo said to run it about 5 clicks in from full soft unless in sand. FC guy said the same thing when he helped me out a bit at the track before i had it revalved and it was stock (this is an 11 but worth a shot). Could also be the larger fork tube diameter is much more rigid and doesnt flex as much making it feel stiffer (reason why A kits are not the best for avg rider...)

Edited by dmm698, April 02, 2013 - 05:58 PM.


  • osheen

Posted April 02, 2013 - 08:55 PM

#13

I also only run about 5 clicks from full soft preload. In addition to the softer spring I run the minimum quantity of oil listed in manual. the clickers are about in the middle. Race sag at 103mm. I'm so happy with the suspension and how balanced the whole bike feels. I can slam into anything with confidence but they are still plush on the chop. I race vet expert.

  • angstroma2004

Posted April 03, 2013 - 04:59 AM

#14

I have the preload turned in only 2 clicks

  • drzadam

Posted April 07, 2013 - 05:15 PM

#15

that is a good tip for a slower rider like me. I set preload at 5 clicks from full soft and the fork really tracks and moves quickly enough to absorb small bumps and chunks at novice speed. You may have to adjust comp and rebound to suit but it makes the fork feel a lot less stiff initially

  • dmm698

Posted April 08, 2013 - 03:54 AM

#16

that is a good tip for a slower rider like me. I set preload at 5 clicks from full soft and the fork really tracks and moves quickly enough to absorb small bumps and chunks at novice speed. You may have to adjust comp and rebound to suit but it makes the fork feel a lot less stiff initially

That's the ticket for most guys even faster ones because you get a real plush initial stroke over the small studder but with clickers changes and even some valving changes to make the mid stroke stiffer and the final stroke way stiffer its awsome. I'm super happy with my SFF stuff. The shock needed a lot of work on the 11 haven't heard about the 13 or ridden one to make a statement.

  • drzadam

Posted April 08, 2013 - 06:49 AM

#17

I like the shock on the '13. I had a PC link arm on my '11 and I just put it on my '13 when I traded in the '11. So my shock is in a little stiffer part of the curve with the new link, but that is it. Most magazine shootouts and tests have said the rear shock is soft on the 13 with std settings. They usually turn in the low speed a few clicks and the high speed in up to 1/2 turn. And a little more rebound too. I do alright with stock settings and the longer link arm. The overall setup seems to be soft in the back and harsh in the front, stock anyway. I was getting close to sending the forks in for a revalve, but with the preload backed out almost all the way, I am thinking the forks might be pretty good with some clicker changes. Getting the front and rear end balanced is really important, and it seems to be possible with the stock stuff. One thing I noticed is that the '13 rear shock has 2.3mm less preload compared to the '12 shock, as delivered. I get OK sag numbers with the stock preload, about 103mm rider sag and 40mm free sag.

  • aichokeu

Posted April 12, 2013 - 08:45 AM

#18

2013 have air forks, so just relieve some pressure?

  • drzadam

Posted April 12, 2013 - 03:45 PM

#19

kx450F has air forks. kx250f has the sff single coil spring fork





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