Reason for asking is toomey recomends their perfect jet kit wich contains 280s & needles, well i got mine from alba and im pretty sure the needles are the same but, not sure about jets. Done plug chop on low end & mid plugs look good ,topend ran about 1/2 to 3/4 of a mile, plugs porcolen was pure white like its really lean, wasnt sure if one run was enough to turn porcolen colors. missing a little down low , runs super strong midrange & top with no cuttin out or backbackfire 'pulls really hard'. Im about 850 asl K&N stock airbox 8 1 inch holes with filters boysen pro reeds needles 4 groove rich 25 pilots Toomey T5s 14&40 gears 1997 just purchased it, not sure may have adjustable timing plate.Iinstalled pipes & jetting new. Wondering if my jets are smaller than dynojets 280. Thanks for any input or recomendations.