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Thanks for the info. I'm only running Av as i had it left over from a turbo sled I sold. Whenever I've ran Av gas in bikes, they seem to run a little cooler (probably due to a slower burn). This Yamaha seems quite lean and runs pretty hot.

Just purchased this bike and took a sample. It's a bit concerning. I assume Al is from the clutch. Is Titanium from the valves? Any idea where the Sodium would be from? Water and coolant didn't show up. Oil type was a guess - it's probably a 10W40. Air filter has been ordered.

First time post for me but have visited this site for over a decade. Need some input here. One sample was Yamalube around 5 rides / 250 miles in the dirt. Next/newer sample was 2 rides (4-5 hours) on Rotella used as a snow bike. I used some Av gas which i think explains the lead. I assume...