logie Posted September 14, 2008 Report Share Posted September 14, 2008 hi can anyone tell me what spark plug to put in my ossa mar 250 & the petrol mix the bike hasn't been ran for 10 years and is rearing to go Quote Link to comment Share on other sites More sharing options...
djr Posted September 14, 2008 Report Share Posted September 14, 2008 spark plug - ngk b8es petrol/oil mix - 30:1 {mineral 2 stroke oil} according to my old 1970's manual , but with modern synthetic oil people mix oil/petrol anything from 50:1 to 100:1, also there could be a better spark plug you could use these days hope this helps Quote Link to comment Share on other sites More sharing options...
dond Posted September 28, 2008 Report Share Posted September 28, 2008 I use an NGK plug BPR5ES in my Ossa and Opti2 oil @ 100 to 1. No fouled plugs, revs clean and no problems. Quote Link to comment Share on other sites More sharing options...
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