Black or Grey 4 Wire, 2 phase full wave rectifier and 12V regulator. Suitable for most motorbikes, and quads and even complete classic bike conversions. Works with or electric start engines. If you've only got a start you can even throw out your battery and run your electrics from this combined unit. Motorcycle regulator rectifiers convert the fluctuating alternator current into 12Volts DC. Allowing you to run your electrics and charge your battery, unit! Swap out your old unit or even convert an old two-part system. With just 4 wires, you can finally your bikes electrics. Suitable for any motorcycle with two live output wires from the alternator. The integrated full wave rectifier on each AC input makes this unit Perfect for two phase and even single phase ! Simply connect up your two coil wires then connect up your battery, and you're done! Wiring your bikes charging circuit has never been so easy! The heat sink on these units is electrically isolated from the internal circuitry, making this 4 Wire regulator rectifier also Perfect for positive earth set ups. Most manufacturers have adopted variations of 's standard wiring colours from the classic motorcycles of the 1970's. Here's a quick fundamental down of the most commonly used wire colours and what they mean. Of course not all manufacturers use the same wire colours, especially in their wiring looms. So it's always to check your bikes wiring manual or talking to your local auto-electrician diving straight in. However, the majority of aftermarket wired regulator rectifiers have adopted these same wire colours. 2 Phase 4 Wire Full Wave Regulator Rectifier Specifications Type: 12V DC 4 wire Regulator Rectifier No. of AC Input Phases: 2 Rectification: Full Wave Connector Type: 4 way 6.3mm Motorcycle Connector Max watt - 110 watt Charging output current 0-4A 4 Wire Full Wave Regulator Rectifier is Suitable for... Most Motorcycles with a carburetor based fuel system. Also suitable for classic bike conversions with a 2-phase stator coil. Today motorcycle regulator rectifiers are considered plug & play devices, they are not all the same. When it comes to wiring it's that you know what each of the fitted pins or wires are for you connect anything up! Otherwise you can damage your brand new bike part you even started, let's avoid that and continue reading... Yellow, White or Pink = AC Inputs (from the stator to the regulator rectifier) Red = V+ (from the regulator rectifier to the positive battery terminal via a fuse) Green = V- (from the regulator rectifier to the negative battery terminal) colour: black Material: Plastic + metal size: Overall Length: 68mm Overall Width: 58mm Overall Height: 23mm Cable Length: 170mm () Distance Between mounting Holes: 51-55mm Mounting Hole Diameter: 6x8mm Package Contents: 1x 4 Wire Regulator Rectifier Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.