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<  Modifications - Mini Off Road Kart  ~  Adding UNI to TALON. Jetting help please!
ajbkid
Post Wed Aug 27, 2008 9:36 pm 
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Location: Valparaiso IN

im going to replace my airbox with a uni filter, but i am confused over the whole rejeting process. i dont know what the stock jet is.

I live in NW indiana (chicago) if climate maters.

I will be running the stock Yerf-dog muffler from
buggydepot.com once they get it back in stock.

I dont know what size jet i need.
thanks

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2005 TALON GX150 IIR
*Bike speedometer
*9g rollers
*1500 main clutch spring
*1500 clutch springs
*Yamaha blaster shocks in rear
*stock talon REAR shocks in front
* UNI filter
*120 main jet



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pghruby
Post Thu Aug 28, 2008 1:25 am 
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You will need a main jet that is somewhere between 120 and 125 if you use a stock exhaust. If you search the forum on how to read the color of your spark plug for fuel conditions, you can fine tune which jet will work best with your engine.
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07 Joyner SandSpider 650
06 Tank Urban Touring 150SE
04 Yerf-Dog Spiderbox 4209 GX150 (SOLD)
04 Yerf-Dog Spiderbox 3206 GX150
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steelbilly
Post Thu Aug 28, 2008 6:56 am 
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most stock 150's have a 104 - 114 main. I agree with pghruby, 120-125 should be close with stock exhaust.
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eddieburnsii
Post Thu Sep 18, 2008 11:02 pm 
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why doesn't someone see what size drillbit fits each size jet??? i know a bunch of you guys have several different size jets you already bought. sure they dont cost much but i dont live near a dealer and it would be much easier for me to just drill out my stock jet.


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Steeda
Post Thu Sep 18, 2008 11:16 pm 
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They have a jet chart for drilling but its pretty limited for drill bits where buying the jets you can have about 5 sizes in between drill bit sizes....
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ricduncan
Post Thu Sep 18, 2008 11:29 pm 
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I forget who posted this the other day.....!

drill_jet.jpg: 4 Time(s) Viewed, 21.31 KB

drill_jet.jpg

Klik here or on the thumb to look at it in real size





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Team913
Post Thu Sep 18, 2008 11:50 pm 
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steelbilly wrote:
most stock 150's have a 104 - 114 main. I agree with pghruby, 120-125 should be close with stock exhaust.


Yep, that sounds righ to me too.
Thank you Ric for posting the jet/drill bit conversion chart again. Thats a handy one to have Wink

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DRIVE IT LIKE YOU STOLE IT!!!!!!!!!
DAZON 150 SINGLE SEAT
2.5inch rear wheel spacers
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UNI, 130jet, BIGE built intake tube, custom built exhaust, HO coil, adjustable CDI, iridium plug



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Steeda
Post Thu Sep 18, 2008 11:52 pm 
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I reckon that pic of the drill chart is a sticky in the engine clinic.
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Too much power is almost enough!

Check out our video

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Click on high quality its soo much better:)



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eddieburnsii
Post Fri Sep 19, 2008 12:49 am 
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thanx for the info. i learn something new everyday. i see there are more jet sizes than drill sizes...


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Steeda
Post Fri Sep 19, 2008 12:55 am 
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You may get lucky and have the drill size be the jet size you need. But to really dial in the tune I doubt it. But atleast with a drilled one it can put you in the ballpark to know what jet you need.
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Darren,
Buggy Junkies
Too much power is almost enough!

Check out our video

http://www.youtube.com/watch?v=yWRb_UbL_F0

Click on high quality its soo much better:)



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