No, there's no way to adjust the clutch engagement times to my knowledge. But you can play around with the rear sprocket to give it more pickup ( larger ) or more speed ( smaller ). Can't give you any info on Amals other than to tell you to let your plugs color determine how rich or lean to run it.
Re: 2 Speed PUCH engine
Want to post in this forum? We'd love to have you join the discussion, but first: