What happens if 20w oil is put into a Yamaha rxs100 2stroke engine?

Answer 1

you mean 20w mixed with gas for fuel? well it'll smoke a lot and not get lubricated properly, but shouldn't be fatal if caught early, i would recommend a good two cycle racing oil, yamalube or eqiv. i used to run 32:1 4oz. to a gallon but you could prob go 40:1 without hurting it. even leaner with synthetics