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Advanced Technology & Engineering Thread, 2002 cr125 in Help / Advice, How-To's & Performance; scootertrash (he finally made an account) has a cr125 from 02 that seems to have ...
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Old 04-27-2008, 03:38 PM   #1 (permalink)
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2002 cr125
scootertrash (he finally made an account)

has a cr125 from 02 that seems to have no power on the low end of the rpm
and has a good bit of power on the top end of the rpm range (but it still dose not feel right)
after it warms up it will die if you flick open the throttle

i think it needs a bigger pilot jet

is my assumption correct?

this bike has a new top and bottom end in it (less than 10 hrs on it)
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Old 04-27-2008, 03:47 PM   #2 (permalink)
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word.
pilot.
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Old 04-27-2008, 03:51 PM   #3 (permalink)
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check the plug for color or lack of, tan, black. none
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Old 04-27-2008, 05:01 PM   #4 (permalink)
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does it bog at 1/2 throttle?
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Old 04-27-2008, 06:46 PM   #5 (permalink)
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nope, only at the beginning when i fling the throttle wide open

so you think it running lean?

it revs fast when cold, but seems to have a little less power than it should

and i still don't see where it is marked on the pilot jet what size it is...
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Old 04-27-2008, 07:26 PM   #6 (permalink)
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you should be able to adjust it with the air srew on the outside of the carb
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Old 04-27-2008, 08:03 PM   #7 (permalink)
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i tried screwing it all the way in and it got a hair better but still bogged
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Old 04-28-2008, 01:40 PM   #8 (permalink)
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it might have something in the pilot jet, or, if it is clear then you should move up a size
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Old 04-28-2008, 02:08 PM   #9 (permalink)
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its clear... i cleaned it myself

how much do jets run?

and if i replace the pilot i have to re tune it all don't i?
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Old 04-28-2008, 02:37 PM   #10 (permalink)
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if the mid range and top end is fine then you shouldnt have a problem, they cost like 5 dollars each, and that might be high
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