I've had an '86, a '98 and a '02 street legal. This is what I have done to give them more, useable power: 1) with the head off, and the piston at TDC, measure the distance the cylinder extends above the piston's outer edge (this is a manufacturing tolerance). Turn this amount off the cylinder's BASE. This does two things--it increases the effective power stroke and raises the compression ratio. Make sure to check the squish clearance and keep 0.050" minimum and the increased compression may require more octane. 2) a RAD valve in combo with the FMF Gnarley pipe makes the "E" engines have more off idle punch like the '86 engine. 3) the PWK carbs are much more influenced by the slide cutaway than Mikunis--go two steps richer than stock (they are very lean) and not only will it pull harder on bottom, you'll notice most of the surging at constant high speeds is eliminated. Oh, and buy shirts with longer sleeves...you'll need them!
