use regular oil for first 600 miles , then you can use syn. oil,. the tranny can take syn. oil any time,. open her up for short runs to help set the rings ,.if you read mototune usa thats how I rode my scoot ,. he said the first 20 miles is the most important to set the rings on compression and decompression,. on decompression I used a steep hill about 1 mile long,. top of hill 60 to 70 miles a hour and close the throttle all the way down,. then a easy run to turn around and WOT up the hill,.I did that about 10 times,.