Also engine VIN 21V-002508
Also engine VIN 21V-002508
You can look it up on my site, both your VIN and engine serial comes up as the 83 YTM200 (Model K). Interesting that the two numbers don't match on the end, not sure if that suggests the engine was swapped from another machine, or if Yamaha didn't match numbers at the factory.
http://atvmanual.com/honda/79-atc-atv-vin-decoder
Also, never had problems running 2 stroke mixed gas in 4 strokes if it's a heavy oil mix I could see it being bad for the spark plug, but 40:1 and thinner should be fine. I just ran my old gas from the chain saws (50:1) in my Honda riding mower and didn't see a difference at all except maybe a tiny bit of smoke on startup (choke + cold engine = lots of fuel being burnt). My chainsaw fuel is also E0 90 octane, not the typical 87 octane E10 that we have at the pumps around here.
Last edited by ps2fixer; 09-10-2019 at 02:04 PM.