Yamaha rxs115 cc.two strk.speed going down.sound changed.?

Question

last 4 months i am using 4 stroke oil for engine n side oil.is that harmful to the bike?i have changed plug and oil line is clear.so what cud be the reason?thanks.

Answer 1

if i understand you correct, your using the oil you mix with the gas, as engine oil also ? i dont think that was a good idea, but im not familure with that bike

Answer 2

May need a top end rebuild (cylinder, piston & rings).

2 stroke engines require rebuilds quite often (once a year).

Get it checked.

The longer you wait, the more the repairs will cost.

Rebuild it now for $150, or rebuild it later for $600+