Spectro Primary Oil

Picking the right primary fluid ensures the life and durability of your primary, that’s why BAKER recommends a 85W primary oil like the Spectro Heavy Duty Primary Oil. This Spectro SAE 85W viscosity helps eliminate any slipping or clutch drag. Learn more about Spectro oils here: https://spectro-oils.com Oil Capacity Detail BAKER Bully Primary Cover Fluid Capacity Dry: 38-45fl-oz BAKER Function Formed Primary Fluid Capacity Dry: 10-14fl-oz 2005-2010 Big Dog Motorcycles Primary Fluid Capacity Dry: 32 fl-oz Factory HD Primary Fluid Capacity  1 Quart* (32 fluid oz) for all Evo and Twin Cam88/103 primaries from 1980-2006 (*except 2006 Dyna) 45 fl-oz for 2006-up Dyna, 2007-up Softail & Touring if the entire primary assembly has been removed OR 38 fluid oz if you are simply draining the old fluid and adding new oil Part Number R.HDPCO Spectro Oil, Primary Chain Case and Sportster Transmission 32oz