people claim a lot of things
BEST can mean different things as well..
truth is: HONDA says 20:1
and what they have in mind is reliability and performance
And although the manual is from the early eighties (I think 1981/82) it's something I would follow for now.
two stroke oils improved over the years and the ratio at whcih they're mixed dropped because of that,
but I would NOT trust some unknown random guy stating 32:1 is best at all
not knowing what oil he used and what fuel he had,
it's not impossible that his engine with a 32:1 ratio lasts for 10k miles from one rebuild to the next,
wheras yours with a 20:1 ratio (using the same grade fuel and identical oil) lasts 20k miles under similar conditions.
Truth is.. with more fuel the engine will perform better, a bit more power and a snappier reaction.
But it's NOT a race kart at all
(race karts fuel up with a 40:1 or even 52:1 fuel to oil ratio at times... but they will need full maintenance every couple of racing hours)
If you find race grade two stoke oil it's save to get a hint more fuel in than what the 40 year old manaul states, I bet.
But 50% ??? IDK I wouldn't trust that unless Honda says so.
22:1 25:1 sure ... maybe.. why not..
but 32:1 is quite a big step from the suggested 20:1..
'sid