TOPIC:

.What color was the foam inside the silencer on the 76 900. Thanks

most are deteriorated and dark orange. I found a dealer take off a few years ago in excellent condition and filter look like standard seat foam. But then again it was still 25 years old and natural aging process takes place.

UNI has a replacement
1973-75 Kawasaki Z1-900 NU-2309 $26.95
Oops never minds that's the wrong year. They do sell blocks of foam for universal applications though.