Scrambler,
What is the exact displacement of your Honda engine?
Just a SWAG on my part:
@ 76.2 rw bhp, (from your PhotoBucket pic), guessing 780cc's (?!?) equals 97.7bhp/liter, not too shabby for air cooled at the rear wheel.
Where does the written 98 crank bhp number come from?
In my world, 76.2bhp x 15% drive train loss (at the most) = 87.6bhp or 112.3bhp/L, pretty good.
98 crank bhp requires a drive train loss % of 28.6%, seems kinda high to me.
JMHO, though. Punch in your exact displacement and re-calculate these numbers to be precise . . . . . . . .
Also: Your a/f ratio needs to be lower between 4000 & 5600 rpm to tune out that "dip" in the power curve. Unfamiliar with those carbs, but it looks like a needle change is in order . . . . . . or at least "alteration" of the existing needles . . . . . . . Are your carbs
perfectly synchronized? That can play he** with a/f.
Fordboy