Want to use any of the aftermarket HD handlebar/risers combos offered by aftermarket?
Change your 4" metric bars set up to accept 3.5" HD bars and riser combos. The 4" to 3.5" chromed bar mod bolt-on is hand shaped from 1/2" mild steel for strength in a "safe critical" application, then show chromed.
No drilling or tree modification required.
All hardware included.