Hi,

Here's the stats and a pic of my Homelite 30cc. It turned an APC 16 x 8 prop at 8600 with only an opened up muffler and a slightly larger carb. Then I modified it...

Homelite 30cc - older design with small transfer ports.
Weight with muffler - 2 lbs. 14 oz. (More cutting/grinding on this one than my Homey 25cc, and this is with prop adapter but without prop or spinner.)
Muffler - Stock, square, gutted, with two brass 1/2" i.d. outlets added.
Carb - 11mm Walbro, manifold ported to match, external pulse line.
Ignition - CH Ignitions electronic set at about 28 degrees presently.
Cylinder - Quench or Squish band removed, cylinder to head clearance set at .020"
Port timing - Exhaust 165 degrees, Intake 148 degrees, Transfers 120 degrees (22 degrees blowdown). All ports cleaned up and entries in crankcase smoothed.
Crankcase- stuffed to .020" crankpin/backplate clearance.
Rings - FRANK BOWMAN'S!!
RPM - APC 16 x 8 = 9400 (Possibly more with tuning and more run time. Also, with this port timing, a tuned pipe would probably give 800 more.)
Test conditions - 4200 feet altitude, temperature 78 degrees, barometric pressure 29.75"

Please also note that while I did modify the transfer port timing, I did not alter the size and I think this would also help. I'll do that on the next one for sure, or use a later model cylinder with the larger transfer ports.

I like it!
AV8TOR