G'day sparker,
That doesn't sound like over-revving to me. Governed speed no load would be around 3100-3200rpm.

The specs for a couple of real OHV Hondas;
GXV140: Idle 2100 +/- 150 Governed No Load 3100 +/- 100rpm
GXV160: Idle 1700 +/- 150 Governed No Load 3200 +/- 100rpm


Cheers,
Gadge

"ODK Mods can explain it to you, but they can't understand it for you..."

"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."