Not Starting-Big Backfires

[400exrapes]

i have a 152 main and 42 pilot at about 350 feet above sea level temperatures are like 0-32 winter like 40-80 spring 75-100 summer here and yeah you can guess about the fall but i need to know what jet i need my quad will not start and has a teeny bit of white smoke need help all the jets i have are a 38,42 pilot and 128,152,165 main jets

[underpowered]

152 sounds lean to me. my guess would be about a 158-160 for the main atleast.

[NRTHBUSH]

im runing that at 1500 feet at -25 c think u should be going smaller.

[j450rking]

if it's backfireing that would be lean someone corect me if i'm wrong

[Honda#4]

yea your running lean, put in a 155 or 158 main see if that helps.