90:1 on a KTM 250 SX 2018
Is it ok to run 90:1 on a KTM 250 sx 2018. Running 60:1 but fouling plugs. Friend recommended me to run 90:1.
Its the jetting . Use good gas ..preferably ethanol free . Amount of oil has a small effect on jetting . Ktm recommends 60:1 . More rpm’s you generally operate at the more oil you need . So small bores need more oil , big bores less . Most all modern 2 st. oil is good , Pick an oil & a ratio , stick with it , jet your machine