A lot of riders complain about the same "stinkbug" issue with the 09+ , the linkage should have helped and lowering the forks in the clamps any farther than they are could cause issues mainly by possibly damaging the cartridge by clamping where its not meant to be clamped , so no , i would not try to go any farther , you mentioned you had it at 115 , did you like the ride/feel ?? , though its farther than "spec" , if it feels comfortable when riding , and you do not notice any adverse handling side effects from it being that low (jumping weird ,swapping ,etc), then i do not see any issue with running up to 115 , the spec is a "recommendation , not a absolute that it has to be at that level (105 is what Honda "recommends" not absolute which is why at that spec most people complain about the stinkbug issue , and end up with linkages , etc) , i do know that linkages can sometime alter the sag settings slightly , for example a 1.75 Kouba link will alter the sag to about 80mm to feel correct and work as it should as opposed to the "recommended" Honda spec of 100mm , so there are always variables , maybe look into the specs of the linkage you have and see if it has any adjustment suggestions or specs that give you more info on what the linkage specifically alters , as not all linkages have the same specs , so depending on the linkage it may say to run 115.............Hope that helps some