Joined: Jan 2008
Posts: 23,645
Likes: 1,109
From: Mans of NC & SW UT Desert
Bikes: 86 Katakura Silk, 87 Prologue X2, 88 Cimarron LE, 1975 Sekai 4000 Professional, 73 Paramount, plus more
IF it is a cassette, it takes two chain whips. BTW, Suntour cassettes have been out of production for decades, and use a unique spline pattern. So no Shimano cassette is going to fit. You will find NOS Suntour cassettes for sale on eBay at higher prices.
The one you have is clearly shot.