i have a 01 400 ex bored 40 over,head ported and polished a fmf slipon,and a uni filter.i was just wondering what main and what pilot i should use.and id like to get rid of the choke. it has a 55 main fmf jet in it now.any info would be nice.thank you

 

I'm guessing 155-158 main and a 42 pilot would be real close. These are Keihin numbers, of course.