Thanks for telling us how you solved your mystery 2Door.
My dad got me some supersized 'ketchup packets' of Opti2 when he went to Maine a while back, but I have some Echo powerblend 50:1 I intend to use up first.
So, If I go to the 100:1 from 50:1 will have have to shrink my jet hole?
(because of the richer fuel ratio)
Oh, and this thread again that refuses to just die!