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Home Workshop: Hot Runner

This is quite a popular seasonal modification, the first thing to consider is the manufacturer of the grips, you get what you pay for. Cheaper grips will indeed kill off your battery if left on in a momentary lapse of concentration. Higher end grips are protected and will cut out should the supply voltage drop below 12v. So even if you do forget to switch them off they will allow you 12 volts to start the bike when you next fire it up.

If you’re going to fit them yourself, it’s worth using a 30amp relay to switch the grips on and off when the ignition is powered on. This way, when you turn off the ignition, the power supply to the grips is cut. With high amps consumption products like heated grips, I would always take my live feed direct from the battery. Taking a feed direct from the loom could end in a melted wire should you choose a circuit not up to the job.