I run a 142 so does sullydirt no lid 1" off the spring 1.25 mm raised needle runs like a banshee. Try it you will like it, oh big gun race core too. At sea level in floriduhhh.

See ya got take my meds, lol

 

I think that's the key. Air lid off with Big Gun Race core will require amuch larger jetsize than what most guys are running. That was evident when Scat pulled his BGquiet core out anddid adyno run. Pretty eye opening....and he had the KDX high flow snorkel.

 

yea, i think i got my mixture just about right now..... 125 main, lid on with big snorkel, race core... runnin good now..... its too wet up here for no airbox lid.... 142 sounds like alot though...... is it a dynojet #? i think deej has his lid off and is runnin a 132? 142 sounds like a hell of alot to me....