Jims Machine JM-5808 Valve Spring Compressor Adapter Tool for use on Milwaukee-Eight Touring 17-Up/Softail 18-UpDescription for JIMS Milwaukee Eight Valve Spring Collar 5808 Use on the new Milwaukee Eight series engine. The smaller multiple valves of the Milwaukee Eight engine require a different valve spring collar for disassembly and assembly. Rather than come up with an entirely new tool for the job, JIMS has developed an adapter collar that allows our existing valve spring compressor to get both jobs done. The usual advantages of lower cost and less space