I meant King in power to weight. And I was comparing a 2 stoke with stock muffler on 5-15% to a 4 stroke on 30%.

Right now I think the Kings are:

18oz- YS63, SA82
21.5oz- SA100
27.5oz -YS110
33.5oz -YS160 and YS140, SA180
42oz -SA220

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The education you guys are giving me on O.S. is really spoiling my fun.[] I have had nothing but great running motors so far.

O.S. 25fx --only mabey 1/2 gal thru
O.S. 46fx --8 gal thru
O.S. .91FX - 7 gal thru
O.S. 108fsr - 10 gal thru
O.S. 1.6FX- 10 gal thru

If nothing else it has cemented my feeling that I did not want to pay very much for a used motor that did not come with a manufactures warranty.

I was looking at this 120 to be a replacement for my 110 thinking it would have similar power to weight.

I guess it will cost ~$250 to my door and another $100 for a Turbo Jett muffler or $350.00

Maybe I will look at the Jett 120 again for $399.00 with the turbo jett muffler. [&:] I just don't like that it is not a ring motor at this large piston size, but I guess the guys at Jett most likely know what they are doing?

Maybe I will pay the 5oz weight penalty and get a Turbo Jett for a 108FSR. I am pretty confident power will be similar.