Trying to dial in jetting w/ adjustable needle....

2 replies to this topic
  • GoonSquadCRFx

Posted 04 February 2012 - 05:59 PM

#1


Jetting-
I started w/ a 152 main, stock needle, moose fuel screw (2 turns) and 42 then a 45 pilot. The bike ripped w/ these jets except there was still a bog w/ the pilot. I put a 48 pilot in and the bog was gone, perfect all the way thru!! Then I got an NCVS 7 clip adjustable needle (on the 4th position) 2 days ago and the bike seems to have a bit of a gargel now @ 1/8-1/4 throttle. I've tried adjusting the fuel screw 1-1/2 turns out to 2-1/2 turns out (and everything in between) and I can't seem to get it to run 100% or near to what it was. The bike does rip alot better off the bottom, mid and top, but theres that little in between 1/8-1/4 that seems to have a bit of a sputter or gargle.. Doesn't seem like a bog, not sure what it is as I'm learning 4 stroke jetting....Do I need to adjust the clip position or am I just off on the fuel screw or is it that the main is still to small? I can't seem to get that smooth idle that I had. When I was adjusting the fuel screw today the bike would stall when it was adjusted in (lean)..

Mods-
airbox mod
pink wire mod
removed baffle
removed screen w/ new twin air
Moose fuel screw 2 turns out

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  • papawhiskey1

Posted 05 February 2012 - 07:21 PM

#2

Sounds like it is a little rich on the needle. Try lowering needle (by raising clip position)1 to 2 positions. If it gets worse go the other way! Any accelerator pump mods yet?

  • GoonSquadCRFx

Posted 06 February 2012 - 06:11 AM

#3

It's an 07, doesn't ned it. Thx I figured it was rich



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