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rejetting honda 300 ex sporttrax

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Old Apr 19, 2008 | 10:46 AM
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Default rejetting honda 300 ex sporttrax

HI , 1st time member, I NEED HELP REJETTING MY CARB, KAKEIHIN STOCK CARB I SNORKLE IT STRAIGHT FROM THE CARB OUT THE BACK AND UP AND PUT A K&N AND A PRE CHARGER ON IT , AND FIRED IT UP I REALIZED, IT,S SUCKING A LOT MORE AIR , IT,S SLOW IN RESPONSE, AND IT BOGS WHEN I CRACK THE THRODLE ,WHAT DO I DO TO CORRECT THE PROBLEM
 
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Old Apr 19, 2008 | 11:23 AM
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Default rejetting honda 300 ex sporttrax

When alot more air is allowed in, you know its gonna be lean, so the symptoms you are exerienceing are of lean.
Heres a link to a good article on do it yourself jetting, and it lists symptoms, and corrections.

<a target=_blank class=ftalternatingbarlinklarge href="http://www.motorcyclecruiser.com/tech/motorcycle_jet_kits_carburetion/index.html
">http://www.motorcyclecruiser.c...tion/index.html
</a>

I would think you need to go up at least 1 or 2 sizes on the pilot jet. And at least 2 or 3 sizes on the main jet, and go from there. There are numbers on the sides of the jets, which are the hole size in the middle of them....bigger numbers are bigger holes. For instance, a 130 jet is 1.3mm in diameter.
 
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Old Apr 19, 2008 | 01:24 PM
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Default rejetting honda 300 ex sporttrax

I JUST CAME FROM A HONDA DEALER , AND I HAVE A 38 PILOT. HE SAID I NEED TO START AT A 35 AND THEN GO DOWN FROM THERE MAYBE A 32.5 HE SAID I,M RUNNING RICH I,M CONFUSED
 
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Old Apr 19, 2008 | 03:09 PM
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Default rejetting honda 300 ex sporttrax

If you have a chunk of duct tape....cover about 1/2 of the snorkle opening...this will make the mixtures richer. Now take it for a test drive. Does it get better or worse?
If its not convient to duct tape, then remove the air box lid....this will make it way lean, take for a test drive and see if it gets better or worse.
 
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Old Apr 19, 2008 | 04:25 PM
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Default rejetting honda 300 ex sporttrax

I HAVE NO AIR BOX , I,TS STRAIGHT FROM THE CARB, ALSO I ORDERED 38.5 ,39, AND 39.5s bringing it up from stock at 38s wich would make it richer , right?
 
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Old Apr 19, 2008 | 05:11 PM
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Default rejetting honda 300 ex sporttrax

then for sure its too lean.
Im not sure where you got those numbers for pilot jets, but the jump is by 2, itll be 38 stock, then 40 and 42 are one and two up.
 
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Old Apr 19, 2008 | 05:47 PM
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Default rejetting honda 300 ex sporttrax

is the pilot for leaning & riching on bottem end
 
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Old Apr 19, 2008 | 07:55 PM
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Default rejetting honda 300 ex sporttrax

<div class="FTQUOTE"><begin quote>Originally posted by: brrijavec300ex

is the pilot for leaning & riching on bottem end</end quote></div>

The pilot jet controls the area from no throttle to about 1/8 throttle.
Needle ontrols from about 1/4 to 3/4 throttle, and main controls from 3/4 to wot
 
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Old Apr 19, 2008 | 09:14 PM
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Default rejetting honda 300 ex sporttrax

thank you very much
 
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Old Apr 19, 2008 | 10:00 PM
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Default rejetting honda 300 ex sporttrax

I AJUSTED MY INTAKE VALVES, AT .010 AND THE EXSHAST AT .010 AS THE DEALER SAID, I AJUSTED BOTH AT THE SAME TIME, AT TOP DEAD CENTER I FIRED IT UP AND YOU CAN HERE THE TAPEDS TAPPING ,I SHUT IT DOWN AND CALLED YOU, CAN YOU HELP ME AGAIN . ARE THE CLEARENCES CORRECT.
 
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