View Full Version : main jet size

04-19-2006, 06:31 AM
i have a 1990 lt 80 it's bored one size DG pipe K&N filter head is ported and polished what would be my best bet on changing the MJ any help would be greatful

04-19-2006, 07:13 AM
With a "ported head" I'd say 87.5 or 90 main.
As allways, let the plug color guide you. :)