Had a buddy fill my tank without him knowing that I usually run 91 (and had a half tank of 91 octane currently in it). Have a 78 peugeot and 77 puch maxi (if it makes any difference at all). Peugeot seems to be running fine, starts after first kick like usual. However the puch is making that flooded noise where it wont catch to start. Any advice or guidance is appreciated !