I want to custom mount a weatherproof audio system onto my Hondsa ST1100 and be able to use my helmet mounted speakers and/ or headphones via a 3.5mm jack. My question is how do I go from the speaker level output on the head unit to headphone level? I have read lots in this forum about home...

I ride a motorcycle (1997 Honda ST110A) and I want to use my XM Roady 2 and headphones that are built into my full face helmet. Mounting the XM and antenna onto the bike is taken care of and I have attempted using small FM recievers using the XM FM transmitter but when that certain frequency is...