Did you need to retard your S Cams intake cam by a tooth to avoid contact with the piston, or not?
Did you put the silicone sealer on the manifold/head joint instead of a gasket?
Would a retarded timing impact the cold start in such a way? The Harris Scrambler was also retarded 1 tooth I believe.... Did see anything like my situ.
Thanks again Paul. Very good information... Reminds me to not over think / over engineer and focus - think basics.