Thanks for the feed back!
Thanks for the feed back. I normally run OEM synthetic oil in my sleds. I'am a first time Yamaha snowmobile owner and as you are aware yamaha doesn't have Synthetic 2 stroke oil. The sled has 4000km on it now or 2500 miles. I haven't checked the power valves yet, but they seem to be working fine. Maybe I will just continue using the regular 2 stroke Yamaha oil. Cheap and seems to be doing the job :-)