Chain falling off of lower sprocket

[Scott_Higashi@el.nec.com]

Just my experience...

> When doing a cam change I've heard that there is not enough room below
the
> lower sprocket for the timing chain to "drop" off the sprocket completely

When I pulled the cams out to try to replace my valve guide seals, I was
able to
make the chain skip around the lower sprocket no problem.  To be absolutely
certain that it doesn't move, you really should tension it somehow...

-Scott