Work well 14v. Only holes 5mm. I very happy
After one Day voltage regulator is burn. Bad quality.
Item won't fitt without drilling bigger holes. Hot when bike running. I used CPU thermal paste between rectifier and XV535 cooler. First 5km was ok. Will see in future. With headlight ON idle 13.8V. On the road 14.0-14.2V. Old OEM was 12.8V.