Inspired by the heated grips thread.....

[Courier265]

Seen a few vids on youtube and many people fit grips direct to the battery.....

Personally I wire them to the ignition.......

[RhynoCZ]

I'm going to say the ignition, just to make sure the grips are off while you're not on the bike. It'd be real stupid to forget to turn the heating off and leave the bike to find it couple of hours later with drained battery. Well that, given you don't leave the keys in the ignition when you get off the bike.
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[grr666]

Voltage sensing technology in mine that switch themseves off if battery level drops. Wired direct to battery.
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Currently enjoying products from Ford, Mazda and Yamaha
Ste wrote: Avatars are fine, it's signatures that need turning off.

[Islander]

To the battery via a relay controlled from a switched live.

[ScaredyCat]

Via PDM60 ...
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Honda CBF125 ➝ NC700X
Honda CBF125 ↳ Speed Triple

[Polarbear]

However Triumph wired them I haven't bothered looking but they turn off with the ignition.
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Victory Cross Country American tractor.

[bamt]

Via the ignition - whilst they turn themselves off if the voltage drops (when the engine isn't running) I don't particularly trust it, and don't like the idea that someone could fiddle with it and repeatedly turn it on.

I actually run via an ignition switched relay that feeds a fuse box that powers all my auxiliary stuff (phone charger, heated grips & seat, lighting, radio gear etc.). That also has a rather nifty function I hacked together that gives me a hold-up switch on the handlebars. The auxiliary power works as you'd expect (on and off with the ignition) unless you switch the hold-up on.

If I switch that on whilst the ignition is on, then my auxiliary relay remains powered even if the ignition is subsequently turned off and the key removed, so I can choose to do things like have my bike-mounted radio remain connected via bike-powered bluetooth to my helmet whilst I'm fuelling up (so using the ignition key in the filler cap) or leave the radio and auxiliary lighting running if I'm a short distance from the bike without needing to leave my keys in it. Once I switch the hold-up off, it won't switch back on until the ignition is turned on again - so it can't be enabled by someone and drain my battery whilst I'm not there.

On the other bike, which has fewer electronic bits, I still wired in a relay to the ignition for grips that should turn themselves off.

[MCN]

Lazy, incompetent, or not giving a shite are the only reasons to connect directly to the battery.

😊
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.

[linuxyeti]

Why bother, for the sake of 1 or 2 weeks a year? I rarely even put the thermal lining back in the jacket ..
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Beware what photos you upload, or link to on here, especially if you have family members on them

[grr666]

[Evil Hans]

[stinkwheel]

Relay controlled auxillary circuit here.

Last chance to see Howto guide to fitting a relay before the photobucket of fail breaks it.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[fatjames]

I leave my bar muffs switched on throughout the winter. Never had a battery problem

[pompousporcup...]

depends which heated grips.

The more recent Oxford grips turn themselves off after a while. Not entirely sure how that works but it did work on my bike.. For ease sake, i fit them direct to the battery

[myvision]

Ignition on one bike.
Straight to battery on another as they turn themselves off apparently.
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VFR800FI, YZF600R Thundercat and FZS 1000

[Andy_Pagin]

[Hawkeye1250FA]

[bamt]

Noise sensing is unlikely. It's far easier just to measure its voltage. Greater than say 13v means the engine is running, less than that means it is stopped. I'd be extremely surprised if anything else is done.

[arry]

[pompousporcup...]

[stinkwheel]

[Freddyfruitba...]

[bamt]

Having checked, the manual says it does both
And yes, I am surprised.

[Fisty]

[Hawkeye1250FA]