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Christian Garcia
Joined: 22 Apr 2012
Posts: 19
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 Posted: Wed Jun 20, 2012 2:25 pm Post subject: pwm carb jetting |
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| What's a good place to start with jetting its a pwm carb bored to a 40 mm pump around setup, 2002 Cr 250 ported, rlv pipe, will be used on Sprint tracks. |
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Mark Croslyn
Joined: 07 Dec 2001
Posts: 151
Location: United States, Georgia,
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| Posted: Wed Jun 20, 2012 4:19 pm Post subject: Main jet |
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Some of the best info I was ever told. "Its easier to change a main jet than a piston". Has echoed in my ears every time I stick a motor. You no doubt have other things that need to be considered when someone gives you a number.
Good luck |
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Ian Harrison
Joined: 23 Nov 2006
Posts: 1671
Location: United Kingdom (Great Britain), Manchester
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| Posted: Wed Jun 20, 2012 5:33 pm Post subject: |
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Otherwise . . . . .
DGH needle, clip in P3
55 pilot
205 Main
Airscrew 1.5 to 2 turns out
Oh and see Mark's comment above!!
Best Regards
Ian 
_________________
Ian Harrison
Viper Racing UK
www.viper-racinguk.co.uk
sales@viper-racinguk.co.uk
+44 7984 225 564
+44 161 343 2009
Championship winning Superkart race team 1997-2012
Last edited by Ian Harrison on Thu Jun 21, 2012 10:39 am, edited 1 time in total |
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Roger Miller
Site Admin
Joined: 19 Jul 2001
Posts: 2917
Location: United States, California, San Jose
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| Posted: Wed Jun 20, 2012 6:49 pm Post subject: |
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I would suggest a 60 on the pilot, that's just to be safe, and if you are running stock ignition, keep the revs at 10, 10.1 max
Then start looking at your plug color and EGTs and go from there. |
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Christian Garcia
Joined: 22 Apr 2012
Posts: 19
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| Posted: Fri Jun 22, 2012 8:16 am Post subject: |
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| Thanks so much again all your input is greatly appreciated. |
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