I have a 1980 CM400t. 120 main jets to start with. Aftermarket cone airfilters. 2 into one welded one side of crossover. Into a 20 inch aftermarket muffler that is still loud and still has good flow. What size main jet and poilet jet shoud I end up with? Any one know? Stock was 112 to 118 main jet, not running lean with out stock airbox. Help!!!!!