Hi i have a 2006 yz 85 goes very well heaps of compression still. No proof of rebuild tho al tho the guy i got it from said its been done not so long ago and the top end gasket looks new! I mixed my oil petrol the other day wen for a 20 minute burn didnt miss a beat! Went well for an 85. Got home and noticed some oil leaking from my Exaust tip not much but a bit. Mixed it 32.1 but might have bit a little extra it was mixed with 10 ltrs of fuel would that be my problem? And the bloke told me he used pretty dear 2stroke oil i used 15 dollar servo 2stroke lmfao is that my problem...any1???