i bought one with pullstart and centrifugal clutch already installed and the engine is alot wider, it has to be mounted alot higher or you would have to get a wide peddal kit or short peddal arms. Its not worth it when you can peddal the bike a few feet and it would start up plus its not much work to pull in the clutch when you stop which i do anyway.
I wished i bought a regualar skinny engine,i had so many problems with mounting this very wide engine, a regular engine would have only took me minutes to install.