hiya, davidsis...i see many ideas here about what a break-in should be like for onna these things, as a 1st-time owner, i'm far from expert at this.
i DO know that the 20:1 mix is very important during break-in & i'm gonna keep using it 'til i feel the power-increase that indicates a decent break-in. i do NOT know how long that'll actually be, however.
if you love your baby, you'll do the math and accurately measure that pre-mix so's you know it's right.
example: i use a set of measuring cups/spoons...
the gas-cup is 1cup/250ml
one oil-spoon is 1/2tbsp/7.5ml & the other 1tsp/5ml.
one of each gives me 250:12.5 = 20:1
Tom in WV: i've posted the tires under "buy/sell/trade"...let's take that convo over there, 'k?