It definitely needs more time to break in, but those numbers are still quite low. Have you gutted the muffler and provided larger outlets? I use two outlets of at least 1/2" i.d. tubing, preferably larger. This is on a completely gutted muffler; no baffles, etc. inside. The original mufflers cost a bunch of power....

A Homelite 30cc in good condition should turn an APC 18 x 6 at well over 7500 rpms, possibly close to 8 grand if everything is optimal. My souped up Homey 30's turn a 16 x 8 APC at 9400 rpms.

AV8TOR