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  1. Off-Road / Enduro
    I have a ktm 250 sx-f (2006)... previous owner put in 15W- 40 SEMI synthetic oil into the bike, i know for a fact it should be fully synthetic. I have some Mobil 15W-50 motorsport fully synthetic oil in the garage and was going to use that. Will that be ok or shall i keep the current oil in...
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