Heated gear current draw - KawiForums - Kawasaki Motorcycle Forums
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post #1 of 11 (permalink) Old 11-11-2012, 09:41 PM Thread Starter
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Heated gear current draw

I am moving back out east and will be riding my bike from the west coast. I will continue to ride, but with heated gear. I have a 2005 zx6r and was wondering if anyone else runs heated gear on this bike. The jacket in question draws 90 watts and the gloves 15 watts each. Can the charging system handle it?
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post #2 of 11 (permalink) Old 11-11-2012, 11:50 PM
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Yea it can handle it.. Your bike is designed so that it can run it's self and allow recharging of the battery. If you crank you bike and unhook the battery it will still run but it is bad for you alternator because of the excessive charge. That excessive charge is more than enough to warm your gear. Although I wouldn't plan on being able to sit with your gear on and the bike off for very long.. that will drain the batter especially since bike batteries are so small.

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post #3 of 11 (permalink) Old 11-12-2012, 10:46 AM Thread Starter
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Does anyone know the stator output in amps for this beast? I've been hunting through my files for the service manual, but no dice so far

EDIT: Didn't know it was so easy to find a copy online. So, the 636 alternator produces 22.5 amps of current at 14v (5000 rpm). (Volts)(Amps)=Watts

So, the alternator produces 315 watts at 5000 rpm. I want to run 90W + 15W for each glove, 120W maximum. Now I have to figure out how much power the accessories draw in order to establish if I will be draining the battery if my heated gear will be drawing 120W. Will report back

Headlight draws 55W continuous. Tail 20W. Gauge cluster unknown, ECU (15A fuse) and other electronics unknown. Fuel pump 5.5 Amps (converting to watts we have (5.5A)(14V)= 77W). Battery needs at least 8A to maintain charge (8A)(14V)= 112W. Fan motor draw? Coils?

Last edited by halffast1g; 11-12-2012 at 11:13 AM.
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post #4 of 11 (permalink) Old 11-12-2012, 11:23 AM
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You're putting too much thought into this. Your gear will draw 8.5-10 amps. It'll be fine.

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post #5 of 11 (permalink) Old 11-12-2012, 11:40 AM Thread Starter
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Quote:
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You're putting too much thought into this. Your gear will draw 8.5-10 amps. It'll be fine.
That is what I am hoping, but I would love to hear back from someone who is using heated gear on their 636.
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post #6 of 11 (permalink) Old 11-17-2012, 01:47 PM
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I loved to read your calculations! Does that mean I'm a nerd! Lol

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post #7 of 11 (permalink) Old 11-17-2012, 03:41 PM
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I can't speak on the specifics of your 636, but on my 650 I used to run a pair of accessory driving lights tucked inside the fairings that drew 35 watts each. The light output would dim slightly at idle, but pick up and be fine by 3,000 rpms. That bike has a 330 watt alternator iirc, and similar electrical demands. I would surmise that your bike would be fine with the heated gear as long as you don't spend all your time at idle.


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post #8 of 11 (permalink) Old 11-17-2012, 11:47 PM Thread Starter
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Heated gear installed. At idle, the headlight dims for nearly a second, then brightens for a second. At speed, headlight is fine. Gear is extremely warm at speed and at idle. Will report back how this gear does when the mornings get into the 30s and40s.
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post #9 of 11 (permalink) Old 11-17-2012, 11:49 PM Thread Starter
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Quote:
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I loved to read your calculations! Does that mean I'm a nerd! Lol


I read on another site recently that the 636 only draws about 215 Watts, leaving 100 Watts free to use. I would be discharging the battery at full draw on my jacket/gloves, but at 10% power on each it gets REALLY hot. This jacket on full power would probably severely burn your skin and that is not a joke.
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post #10 of 11 (permalink) Old 11-18-2012, 12:41 AM
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What brand of jacket is that. The ones I was looking at earlier today only drew 75 watts.


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