The forks on my ‘90 LeMans match the ones shown in the Harper’s parts diagram for a ‘90 LeMans. They do not, however, match the ones in the shop manual.
These forks have a sealed cartridge which bolts to the bottom of the lower tubes. This means that the oil in the fork legs doesn’t serve any damping function - all it does is lubricate the contact area between the fork tube and the fork lower. The damping function, as far as I can tell, is performed only by the cartridge.
The manual calls for 3 oz of dextron in each fork leg. This spec, though, is for the forks shown in the manual, not the ones on the bike.
So - what oil, and how much, goes in each fork leg? Any ideas?
I’ve disassembled the cartridges, replaced the bad seal, and am filling each with 7 weight fork oil.
