popping flames??
11-21-2008, 05:01 PM
#1
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Location: braintree, MA, usa
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popping flames??
I just picked up a 04crf with a 88cc big bore kit with a two brothers exhaust. Now the bike starts up at most in 3 kicks in the 30 degree NE weather. When i rev it up to almost full throttle it gets choppy and starts popping flames...normal? does it sound like i need to tune it? Also when im goin from 1st to 2nd then WOT 2nd it gets choppy till i go into 3rd... what you guys think? any comments are appreciated.
11-21-2008, 05:29 PM
#3
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Re: popping flames??
Why didn't you start it an try it out before you bought it ?
Are you letting it fully warm up ? And are you turning off the choke after you start it .
Are you letting it fully warm up ? And are you turning off the choke after you start it .
Last edited by Crazy D; 11-21-2008 at 05:32 PM.
11-21-2008, 05:43 PM
#4
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11-21-2008, 07:36 PM
#5
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Re: popping flames??
It could be runnin lean cuz its so cold. You can make adjustments in the carb to help, but one quick way to tell is to pull the choke up half way and see if it gets better, if it does, you need to richen up the carb. You can do that by lowerin the clip on the needle inside the carb slider, were the throttle cable hooks up.
11-21-2008, 10:45 PM
#6
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Re: popping flames??
It could be runnin lean cuz its so cold. You can make adjustments in the carb to help, but one quick way to tell is to pull the choke up half way and see if it gets better, if it does, you need to richen up the carb. You can do that by lowerin the clip on the needle inside the carb slider, were the throttle cable hooks up.
11-21-2008, 11:36 PM
#7
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11-22-2008, 03:16 PM
#9
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Re: popping flames??
put a new plug in it. let it warm up and then pretty much top it out and then shut it off pull the plug and see what color it is. your lookin for a coco brown colored plug. white or really light brown is runin lean. a dark/almost black color is rich. shootin flames is an indication of runin rich. popping while gettin on the throttle means lean.
11-22-2008, 04:59 PM
#10
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Re: popping flames??
It could be runnin lean cuz its so cold. You can make adjustments in the carb to help, but one quick way to tell is to pull the choke up half way and see if it gets better, if it does, you need to richen up the carb. You can do that by lowerin the clip on the needle inside the carb slider, were the throttle cable hooks up.
couldnt find the choke..i only found the fuel cut...if the kid upgraded to a 88cckit, would it still have the choke?
11-22-2008, 06:54 PM
#12
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Re: popping flames??
If it is a stock keihin carb , the choke is quite visible . It is a lever on the side of the carb .
Last edited by Crazy D; 11-22-2008 at 06:58 PM.
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