Yes if the vehicle total km is less than 80000km and is on proper service you can use engline flush. make sure that if the bike have a oil filter change that also after flushing ...
Adding an engine flush to your maintenance routine helps your motor last longer and really aids in optimizing oil consumption. This is why a quality flush, such as LIQUI MOLY's Pro-Line Engine ...
however, if your scooty has done more than 40k km, you may consider treating it with a good quality engine oil treatment like bardhal, nulon or liqui moly during the next oil change and servicing.