Hi all, Got a Te610, 2000 model year. Left kick, no battery or starter. Thought normal engine, but when I ordered a cam chain the new one had 1/2 a link less. Shop said my motor must be a 630 stroker and very rare. Does this mean factory stroked or modified? My base gasket appears to have a spacer which also suggests it's been stroked. Mainly wondering if they came from Husk like this as an option?