Just more evidence that you can't believe everything you read -- here or elsewhere. However those numbers are correct. I believe the 4-stroke is a 7.5 cubic inch "single cylinder" whilst the 2-stroke is a 12.5 cubic inch "two cylinder" and as such will likely eat the 4-stroke for lunch.
I'll never understand why that would "eat it for lunch" unless the horsepower rating on one of them was wrong . . . If they are both 6 bhp at rated RPM and propped accordingly the lighter combo should be doing the eating . . .
