ElectroSport Honda Rectifier / Regulator Combo - CB350 CB400 CB500 CB550 CB750

Battery not charging or overcharging? Doing a lot of city riding on short blocks? Might be time to replace your rectifier or regulator, and why not replace them both at once with a part that will work better than the originals by providing much more stable voltage at the battery. This is an ElectroSport combination regulator/rectifier, it's meant to replace the stock regulator and rectifier, which were 2 separate parts.

Upgraded rectifier bridge components and an extra heavy duty regulator circuit. Comes with information and wiring instructions. Designed to plug into the stock wiring harness. See the instructions here online.

It has cooling fins on it, so be sure to install it somewhere that gets adequate air flow.

Replaces these Honda OEM part numbers: Rectifier: 31700-333-008 Regulator: 31400-300-035

ElectroSport Part Number - ESR240

*Note: This is not designed to work with Lithium batteries. It does work with all standard lead-acid based batteries which came stock on the models below. It also works with AGM, Gel and other sealed batteries.

Fits Honda:

CB350F - 1972-1974 
CB400F Super Sport - 1975-1977
CB500K - 1971-1973
CB550F Super Sport - 1975-1977
CB550K - 1974-1978 
CB750F Super Sport - 1975-1978
CB750K - 1969-1978

Does not fit CB750A Hondamatic.