A rectifier on a Motorcycle does likewise an ordinary rectifier does:
It changes over exchanging current to Alternating current.
The explanation you need one on a bike (or a vehicle) is that the bike is furnished with an alternator, which is only a gadget that takes control (as pivot) from the motor and changes over it into Alternating current (AC).
Think about the alternator as a sort of generator.
Presently AC is a fine source of power for lights, yet you can't nourish AC into a battery or into a fuel infusion PC and anticipate that it should work.
The rectifier's responsibility is to change over this AC control into Direct Current power so it very well may be utilized to charge the bicycle's battery and generally control all the 12 volt (DC) gadgets on your bicycle (hardware, tachometer, and so on.)
It merits referencing that for the most part a rectifier is joined with a voltage controller, which ensures the alternator doesn't produce excessively (or excessively little) control/voltage.
In the event that your alternator were to produce a lot of voltage you'd hazard cheating the battery, wearing out your bicycle's hardware, and so forth. What's more, on the off chance that it created too little your battery would gradually deplete (this is the most well-known disappointment in a voltage controller)
I bring this up in light of the fact that on most bike they will in general consolidate these two capacities into a solitary rectifier/controller.
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