

This can be too light for most heavy big twins despite having similar chemical qualities.

The alternative product for those who require superior performance is Shock Therapy #10 Fork Oil which can be used in place of either type oil. If using Harley brand fork oil then type “B” or “E” is recommended depending on the model. Replace the plugs and fill the forks through the top caps with an approved fork oil. The capacity varies by model but for most Softails and Dynas this amount is about 9 to 10 oz. Once completely drained, pump the forks to expel any remaining fluid. Unless you plan on rebuilding your forks and replacing seals, simply drain the fluid from the drain ports. Most recent model Harley’s have drain plugs and fill plugs to ease this operation. The oil in your forks are just as important as the other lubricants in your motorcycle, and must be changed on a regular basis to keep the seals from cracking and the fork’s shock/dampening functioning properly.Early models require disassembly of the fork sliders and you should consult your shop manual for this. Changing your bike’s fork oil is a simple task that many neglect.
