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Old 16-04-2009, 09:11 PM   #21
burbling1
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Re: Pit bike backfiring!!

Quote:
Originally Posted by spam up View Post
soooooooo....... i stil got no idea which is the mixture and which is the timin lol
You will have 2 adjustment screws on your carb 1 will be for idle and 1 for the mixture. If you can can only see 1 on the side of the carb that will be the idle and the other (mixture) will be underneath. If so remove the carb and unscrew it 1/4 of a turn, refit the carb and see if its better.

If you have 2 on the side of the carb start the bike up and then turn one of them taking note of of how far you turn itif it increases or decreases your revs then this is the idle screw if not its the mixture.

Hope this helps.
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Old 16-04-2009, 10:08 PM   #22
spam up
 
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Join Date: Mar 2009
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Re: Pit bike backfiring!!

Quote:
Originally Posted by burbling1 View Post
You will have 2 adjustment screws on your carb 1 will be for idle and 1 for the mixture. If you can can only see 1 on the side of the carb that will be the idle and the other (mixture) will be underneath. If so remove the carb and unscrew it 1/4 of a turn, refit the carb and see if its better.

If you have 2 on the side of the carb start the bike up and then turn one of them taking note of of how far you turn itif it increases or decreases your revs then this is the idle screw if not its the mixture.

Hope this helps.

yea there is only one screw on the side

if u dont mind i will take a photo of it tomorro and u can tell me which one then please
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Old 29-04-2009, 10:31 AM   #23
TiMbO17932
 
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Location: Humpty Doo, N.T Australia.
Age: 28
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Bike: 90cc Thumstar
Re: Pit bike backfiring!!

I have a 90cee cee thumpstar that keeps backfiring! which way do i turn the carb screw? and how far do i turn it?
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Old 29-04-2009, 11:22 AM   #24
dale_brah
 
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Location: australia wollongong
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Re: Pit bike backfiring!!

Some carb have them on side, and some are underneath


The normal adjustment i kno of is
turn in all the way then out 2 full turns,the idle screw should have a spring on it

the carb wich has 1 screw should have it underneath unless the idle screw fell out leaving 1 screw LOL

Sorry if didnt make sense
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Old 14-01-2013, 06:03 PM   #25
kawasaki evo
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Re: Pit bike backfiring!!

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Originally Posted by evopitbike View Post
Idle srew WTF no mixture srew .... back fire is normally jew to... too much fuel left over
i doubt you know anythong about pit bike minr had got yz 250 dust caps
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Old 14-01-2013, 06:04 PM   #26
JordyRoo
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Re: Pit bike backfiring!!

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Originally Posted by kawasaki evo View Post
i doubt you know anythong about pit bike minr had got yz 250 dust caps
dude you read the age of the thread??
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Old 15-01-2013, 12:45 AM   #27
tricky85
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Re: Pit bike backfiring!!

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Originally Posted by JordyRoo View Post
dude you read the age of the thread??
Lol 4 years ago
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