HMF recommends 145/148 witch they sell for 5 bucks each
but she's stalling sputtering at top end before i reject down
what do you guys think about adding some more air
with holes in air box ? thanks fo any help

 

more air ..............

try proping the air box lid open ...... put the two clips on the back under the lid ..... makes about a 1/2" gap
across the back ............... if it works ..... put some holes in the lid !

 

That right. It does wonders for me at 4600ft. I just prop up on 1 clip. Makes a very small slit, but makes a huge diff for me.

 

THANKS guys i'll reply with results