I think you have the KT17 twin confused with the K341 16 HP single. The flat twin Kohlers are smooth running. The singles, not so much.That Briggs will run a lot smoother at all speed ranges than a shake & bake KT17. I have a rebuilt 10 over Briggs L head in mine. Mounted soild just like the OEM 582 were. Nice machine Andrew. Should run you a long time.