ive got a raptor with a yosh titanium pipe with the graydon airbox and 250r style filter. yosh calls for 150/155 main jets no snorkle and two holes in lid.with this setup the bike was running very lean.even before i installed the airbox i knew i had to go bigger with the jetting.but now the airbox is on here's my question.im thinking of going with 165/170 on the mains as graydon called for in the dirtwheels pipe shootout, or should i go with 170/175 mains as ct racing used on there pipe in the test? and is there a big difference in those 2 sizes. any help would be great.