Hi I my cylinders were bored out 20 over. Now do I have to increase my main jet by 2 sizes?? and also when assembling the engien do I ssoak the crank in 10 30 oil and coat the rings and cylidner walls with 10 30? Thanks

You dont have to increase jet siize.You can coat lightly the piston with oil before reassemblinig,same for crank bearings.

If you use oil on the pistons, use 2-stroke oil. Otherwise that white motor rebuilding grease works xcellent. No need to soak the crank, although that wont hurt anything. Just squirt 2-stroke oil in the bearings.