i got a brand new set of 28mm mikuni flatslides and im having trouble jetting them, 290 main 30 pilot 175 emulsion tube clip on the 4th from the top,bike is stock except t5's,4 degrees of timing and pods,fresh rebuild also,held 7 pounds for 35 minutes on a leakdown,my question is what needle should i be running and are the 175 emulsion tubes enough? or too big? any input helps,thanks