99 cr250 jetting need help!!


11 replies to this topic
  • 426 hemi

Posted November 17, 2011 - 03:43 PM

#1

I took my cr out the other day and its getting cold so its a little lean with a 55 p jet 178 m jet mid clip on the needle so i put in 182 m jet and a 58 p jet now if i roll on the gas it pulls nice but if i wack it off idle the bike stalls im lost need help!!
i live in maine 0 elev and its in the 40 s

  • 426 hemi

Posted November 18, 2011 - 05:27 AM

#2

nothing?

  • Third-Reef

Posted November 18, 2011 - 07:36 AM

#3

Mess with the air screw. Sounds like turing it in (richer) would help you out. Also try dropping the clip on the needle a notch (raise the needle). the air screw will mostly effect the idle to 1/8 throttle and the needle will be 1/8 to 1/2.

  • shrubitup

Posted November 18, 2011 - 10:49 PM

#4

Refer to this post for jetting chart.

Believe 00 is similiar to 99.

http://www.thumperta...355&postcount=2

  • 426 hemi

Posted November 19, 2011 - 11:30 AM

#5

my 99 has the power jet carb so that is not going to work but thanx

  • shrubitup

Posted November 19, 2011 - 01:03 PM

#6

If you have a manual it will have a similiar chart. At least the 02-03 manual does.

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  • Keith72

Posted November 19, 2011 - 01:36 PM

#7

I took my cr out the other day and its getting cold so its a little lean with a 55 p jet 178 m jet mid clip on the needle so i put in 182 m jet and a 58 p jet now if i roll on the gas it pulls nice but if i wack it off idle the bike stalls im lost need help!!
i live in maine 0 elev and its in the 40 s


Stock jetting for you is 42 pilot 190 main. r1370dka needle clip 3rd from top.

Honda service manual suggests 42 pilot and 198 main needle clip fourth from top for your elevation and temp. Looks like you are still a little lean with your current jetting.

  • 426 hemi

Posted November 19, 2011 - 03:32 PM

#8

that seems realy lean on the pilot?

  • hallsy

Posted November 19, 2011 - 05:05 PM

#9

my 99 has the power jet carb so that is not going to work but thanx

Are you sure it's a 99? The 97' and 98' CR 250 came with the power jet carb. In 99' the CR 250 carb didn't have a power jet.

  • Keith72

Posted November 19, 2011 - 07:59 PM

#10

Are you sure it's a 99? The 97' and 98' CR 250 came with the power jet carb. In 99' the CR 250 carb didn't have a power jet.


This is correct. However someone may have fit a 97 or 98 carb to it.

  • 426 hemi

Posted November 20, 2011 - 04:46 AM

#11

im told in 99 it had both and in fact it is a 99 cre 250 so that might be why it has a pj

  • mynewcr250

Posted November 20, 2011 - 09:18 AM

#12

how old is that top end? worn rings will show lean. possible you are chasing jetting with a worn top end?

if stock jetting is 42 on the pilot and youre at 58, i think you may have a different issue. even in 40*f weather that seams pig rich.





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