You can install the new valve seal, the valve spring, and the retainer, compress the valve spring, install the valve spring keepers, disconnect the air hose and air hose adapter, remove the EN-43649-valve spring compressor and EN-43649-10-valve spring compressor adaptor set, install the spark plugs, the camshaft roller followers and the camshaft, remove the EN-43653-flywheel holding tool and install the starter.