The OEM front suspension on the Triumph Scrambler is too weak for even mild of road work. Both springs and damping are too soft; the forks would clunk to full extension over bumps and bottom on landing. Watson Performance reworked my suspension with 10kg springs and 20wt oil up front. The measured height of the oil was 120mm without the springs and the forks collapsed.  This cured the fork problems with making the ride too harsh. Handling was much improved.