I am tuning my raptor right now, i have 185/180 mains... my spark plug was totally black and i could feel that it was hurting for air. the air screws are at 3 turns out. you think adjusting the airscrew would be enough??? plug wasnt wet, just all black. btw needle on 4th click from top and it

 

11:1 weisco piston 670cc, stage 2 web cam, 3000 ft, dyno jetting, modded airbox, stock filter, new valve springs, big gun pipes, it was about 70 degrees when i tested. Was just woundering if air screws make a big diference or just a minor diference.

 

Hey i just looked at the barlett racing site, what are those hub attachment things, and where can i get them!

 

Dude, you are way to high on your jets. You say your useing DynoJets. 180/185 is way way to high. Thats why your plug is black. Air screws do nothing for plug checks on the main jets. Your useing stock filter with airbox mods. 3000' elevation, I'd say 150/155 jets are all you need. Dyno Jets. springs, needles.

 

Well we were running 165/160 jets before and were lean, so we jumped up alot and figured we would work down, just wondering if airscrew would do anything

 

The mixture screws effect the entire range but have very little effect the the closer you get to wide open.

 

you are over jetted, back down a few steps and let her rip.

 

Start fat and then travel towards lean? Perfect way to go without wories. Thats a lot of jet you got now



BRAAAAP

 

i know, 185/180 will do the trick for dumont.... heading out there saterday morning [img]i/expressions/face-icon-small-smile.gif[/img] (btw i was wrong before i had 190/185) now i run a little rich here but dumont is 2500 feet lower than i am now so i think ill be ok

 

Nobody mentioned it, and I am sure you know, but I just want to make sure you konw that Dynojets are measured differerently than mikuni jets. Dyno 180 is WAY bigger than mikuni 180.

RR1