heavy smoke

1999 440 Sport Touring. Previous owner said it smoked a lot and used more oil than usual. The oil pump is set correctly and it has good compression on both cylinders. Previous owner had a qt of Cat oil in the trunk so I swapped the oil out and let the new oil bleed through the pump to get the air out. I haven't ridden it except for just around my house a couple times (small city lot and the neighbors must've gone crazy). It still seems to smoke a good bit. Any other ideas? I did have some Seafoam in the gas during storage. I haven't known Seafoam to cause smoking in my cars unless run through the intake system. I do seem to smell the Seafoam in this machine when it's running. Is that because it's a 2-stroke?

Thanks.

heavy smoke