2001 cr 250 won't idle with kehein pwk carb


17 replies to this topic
  • rmzrider21

Posted August 27, 2012 - 05:57 PM

#1

I bought a 2001 cr250 recently and put a new top end on her. cylinder piston rings etc also new reeds . now she won't idle need help.!!

  • mynewcr250

Posted August 27, 2012 - 06:20 PM

#2

i remember you posting this up a while ago. what is:
1) your average temperature
2) your elevation
3) your current jetting and air screw placement
4) your current float level

  • rmzrider21

Posted August 27, 2012 - 06:26 PM

#3

jetting is 180 mj 48 pj and air screw 2turns out needle at 3 clips and elevation 2000 with 60-80°F

  • mynewcr250

Posted August 27, 2012 - 06:35 PM

#4

stock reeds?

  • KcDavis

Posted August 27, 2012 - 07:38 PM

#5

I am assuming you tried adjusting the idle?

  • mynewcr250

Posted August 27, 2012 - 08:52 PM

#6

if you have stock reeds try 42pj, needle on 2, 172 main. start with the air screw at 1.5 turns out. it should idle using that PJ, and the needle and main are good at sea level here so it should be a little rich at 2k feet and leave room for you to adjust from there.

  • rmzrider21

Posted August 28, 2012 - 03:00 AM

#7

boyesen rad reeds are in it.

  • bonescr250r

Posted August 28, 2012 - 03:10 AM

#8

Why do you want your bike to idle? To foul plugs?
2 stroke bikes really dont like to idle.

  • Kirkes

Posted August 28, 2012 - 03:42 AM

#9

BS

  • mynewcr250

Posted August 28, 2012 - 04:41 AM

#10

boyesen rad reeds are in it.

ok, the boyesen will like a richer pilot and usually a leaner main, even so, at your altitude id start with a 42pj and airscrew at 1.5 and see if she'll idle on her own.

  • frdbtr

Posted August 28, 2012 - 06:22 AM

#11

Why do you want your bike to idle? To foul plugs?
2 stroke bikes really dont like to idle.


My 2 stroke idles like a 4 stroke all day and never fouls plugs. This is a myth fabricated by people trying to screw buyers into buying their clapped out pieces of crap by telling them that the reason it runs like crap is because "2 strokes are not meant to idle".

One more thing, I watched a race from 03 with Ricky Carmichael and at the end of it he pulled off the track to pick up his mechanic in the pit area and his 2 stroke sat and idled like a 4 stroke. Any well tuned bike will idle 2 stroke or 4 stroke.

  • Jeekinz

Posted August 28, 2012 - 06:31 AM

#12

What jets do you Honda people typically run with a Keihin? KX's are normally 45/48; 158/160. Just curious, 180 seems fat.

  • bonescr250r

Posted August 28, 2012 - 06:36 AM

#13

My 2 stroke idles like a 4 stroke all day and never fouls plugs. This is a myth fabricated by people trying to screw buyers into buying their clapped out pieces of crap by telling them that the reason it runs like crap is because "2 strokes are not meant to idle".

One more thing, I watched a race from 03 with Ricky Carmichael and at the end of it he pulled off the track to pick up his mechanic in the pit area and his 2 stroke sat and idled like a 4 stroke. Any well tuned bike will idle 2 stroke or 4 stroke.


My 2 stroke dont idle because when im trail riding, if i come off the bike i want the back wheel stopped if i happen to fall into it.

Have seen fingers almost lost because a bikes engine kept goin when his hands went in.
I have seen mx boots literally grinded to the ankle bone of another person. He still walks funny.

I have a couple of things i like about my bike not idling(it will if i want it to)
What advantages does having it idling do? NONE

  • frdbtr

Posted August 28, 2012 - 07:34 AM

#14

My 2 stroke dont idle because when im trail riding, if i come off the bike i want the back wheel stopped if i happen to fall into it.

Have seen fingers almost lost because a bikes engine kept goin when his hands went in.
I have seen mx boots literally grinded to the ankle bone of another person. He still walks funny.

I have a couple of things i like about my bike not idling(it will if i want it to)
What advantages does having it idling do? NONE


Ok, saying that you jetted your 2 stroke so it wouldn't idle for safety reasons and saying that a 2 stroke "isn't meant to idle so it won't foul a plug" is a completely different statement.

  • KcDavis

Posted August 28, 2012 - 07:55 AM

#15

My CR 250 idles all day. Going on 3.5 years of owning the bike and haven't fouled the plug yet.

  • mynewcr250

Posted August 28, 2012 - 09:27 AM

#16

Well looks like everyone shit all over your thread with more useless 2 strokes should/shouldn't idle opinions.

Pm me, ill try and get you sorted.

Edited by mynewcr250, August 28, 2012 - 09:28 AM.


  • rmzrider21

Posted August 28, 2012 - 09:50 AM

#17

ok pm me bc my phone let me

  • YHGEORGE

Posted August 28, 2012 - 12:02 PM

#18

I am assuming you tried adjusting the idle?

Thats a very good point many overlook.





Related Content

Forums
Photo

Won't Start! Need Help! by Ging3rDedMan


Dirt Bike   Make / Model Specific   Honda   Honda 2-Stroke
  • Hot  94 replies
Forums
Photo

CR250 Swingarm by 2StrokestheFuture


Dirt Bike   Make / Model Specific   Honda   Honda 2-Stroke
  • 1 reply
Forums
Photo

2007 CR250 IDLE AND LOW RPM PROBLEMS by Speeddemon73


Dirt Bike   Make / Model Specific   Honda   Honda 2-Stroke
  • Hot  33 replies
Forums
Photo

85 or 150? by drzrider04


Dirt Bike   General Dirt Bike Forums   What bike should I buy?
  • 8 replies
Forums
Photo

Last generation cr250s by hondaman331


Dirt Bike   Make / Model Specific   Honda   Honda 2-Stroke
  • Hot  181 replies
 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.