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Old 08-24-2009, 05:01 AM   #1
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Default measuring carb slide opening?

Is there a way to measure the 1 mm for the carb slide when its at idle, or does everybody just eyeball it? I noticed on my trx 2.5 that I can back the idle screw almost all the way out and the it still idles fine. Is the slide supposed to close all the way or is there a internal stop? I can adjust the idle up ok, but it will only go down so far.
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Old 08-24-2009, 05:23 AM   #2
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just eyeball it
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Old 08-24-2009, 11:30 AM   #3
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you can make a feeler gauge with an old credit card

if you cant back it down, there is something wrong
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Old 08-24-2009, 08:51 PM   #4
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Originally Posted by cassidy View Post
Is there a way to measure the 1 mm for the carb slide when its at idle, or does everybody just eyeball it? I noticed on my trx 2.5 that I can back the idle screw almost all the way out and the it still idles fine. Is the slide supposed to close all the way or is there a internal stop? I can adjust the idle up ok, but it will only go down so far.
If you trim is not adjusted right it wont allow the carb to close when you turn the idle down.
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Old 08-24-2009, 09:29 PM   #5
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I use drill bits to measure carb openings & pre fer to tune needles to match whatever the MFG says the opening should be set at give or take a hair.
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Old 08-24-2009, 09:56 PM   #6
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Quote:
Originally Posted by butch man View Post
I use drill bits to measure carb openings & pre fer to tune needles to match whatever the MFG says the opening should be set at give or take a hair.
Yap, I always use drill bits, you should get in hardware stores pretty cheap

Just take out venturi, close carb and measure, and make sure that you have properly adjusted link between carb and servo, because sometimes, if it not correct after turning on power it will move out and you will get bigger gap than you made
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