i have been fighting this issue for a week and im going crazy. Long story short, the bike sat in a shed for 5 years and has needed a good bit of work. One if the items that needed fixed was the front master cylinder. It refused the hold brake pressure and I bought a rebuild kit. To my knowledge, there was no leak before i disassembled. The rebuild went great and after bleeding the brakes, the handle feels great, the brake works great and it hasnt lost any pressure, even after sitting for days. After putting it all back together, i reused the old copper crush washer and immediately checked for a leak. No leak was detected so i rechecked for a leak about 3 hours later and noticed a very small amount of fluid on the bottom of the banjo bolt. I didnt want to overtighten it so i went a little more which didnt help. I went to the harley dealership and got two new washers but these have the rubber in the middle. I installed them and after bleeding, it still leaks. I went and bought two brand new copper crush washers and barely tightened it past finger tight. It had a bad leak and everytime I detected it leaking, i put the wrench on it and bumped it to make it tighter. Ive been doing this for days and now its on very tight and i dont want to really go anymore. The banjo bolt looks good (had some minor rust at the head and on one of the flat spots in the bolt but its all clean now). Its only leaking between the master cylinder and the washer. The master cylinder looks great and is clean. I am out of options here. What should my next step be? Thanks

Thanks for all the replies. I think i have narrowed the problem down to a leaking sight glass that was flowing down to the banjo bolt. Ill advise everyone for sure once i fix the issue.