Just installed Malossi top end on qt50. Was running an 85 jet but could tell that I needed to upjet. I put in a 90 jet and took it for a ride. In the middle of the ride at maybe 3/4 throttle, temperature starts shooting up beyond anything before - 396F. Hottest it had been with 85 jet was 381F. So I slowed and let it cool down and brought it home. this left me scratching my head, wtf, right? I'm thinking I misread the number on the jet. Did I put in a 60 jet? No. I remove the jet and it reads 90. I check it several times. Still reads 90. I take out my drill bits and try to stick an 85 drill bit in it - no go . I try an 80 bit - it goes in barely. Check the jet again, it still reads 90. Good thing I had a temp gauge. Anyone else ever run into mistakenly marked jets? I'm thinking this should be an 80 jet.