I've always used carpet padding cut in a single
large piece that fits from my engine compartment
to down under my rear seat.  It cuts noise
tremendously.  When you need to get to the
engine, just roll it back.  I've used this on
my 81 Westy "BaseCamp" (now sold) and on my
87 GL.  Makes things nice and quiet.

Billy Bones is going to get some carpet padding
installed this weekend.

I've also noticed that Westies have a more
"tinny" sound when you close the doors than
do the GLs.  I'm going to buy some tarpaper
felt and 3M adhesive and get busy inside those
doors.  Road noise sucks.

Cheers,

Warren
88 Westy "Billy Bones" (we've signed Articles)
87 GL "Long John"