honda clone gx-200

Hey guys, I recently rebuilt my Hisun 196cc motor and when I run the engine it idles roughly. Here's some specs 18 LB valve springs PVL Aluminum flywheel with 31 degrees BTDC Billet con rod governor removal BSP-2 cam Everything else stock The engine seems to run fine at higher RPM but at idle...

well im doing a sort of restoration (makeing it look ok and run decent) and i know they used an older tecumseh flathead 3-4 horse but id like to know if a gx_200 honda clone engine would fit on it thanks