Yeah,Casey,50-50 mix only to the proper fill limit is okay if you only run it on the stand for 5 minutes.Don't throttle it too hard,but rev it a little for gear change if it's a 2-speed.Don't ride it while you have kerosene in it.Then drain it out and replace it.I'd also run it again with the Dexron and drain it out once more to make sure you get all that kerosene out of there.But I had forgotten that Ike has a manual you say?If he's got a manual you can try this or take it to him.A shop manual is a life-saver and a time saver.Re-read my February 3rd posting at 00:58 if you're gonna do the flush.Here's to the great Kriedler moped!Hip,Hip,Hooray!(:^)