I like to ride all year. "If I'm not slidin, I'm ridin" is a common phrase I can tell anyone as they pass by, astonished I'm still riding into the colder season. At 20 degrees, if there isn't ice, I can be found on my bike, starting it up to make my way into work or wherever I happen to be going.
Heated gear, even gloves, can easily go over 150.00 if you don't already have the heat controller.
Then one day, I was walking through Menards, a hardware store for those who don't know, and spotted a $15 dollar 12 volt fleece blanket that you could plug in. Little did they know, I would cut this blanket apart to get the wire out to use for something else.

This is my thermal insert, made by Tour Master. I sewed additional fleece at the ends of the sleeves, because it just wasn't made long enough for me, and the fleece fixed that part. Now that it's getting into the low teens and single digits, it's time for another weapon, something a little warmer than I can make myself.

Step 1:

This is the lot. Somewhere near 30 ft of 12 volt warmliness, just waiting to be added, strategically, to make your cold weather riding more tolerable. What you don't see is the 30 minute timing circuit that comes with it. I just cut that off and added the wires again, soldered, complete with shrink tubing. The circuit is only for shutting off the blanket after 30 minutes and you would otherwise have to press the button for another 30 minutes of heat. I just spliced in a connector that I can pull out and push in as needed, to disconnect the power. You can make an inline switch if you like, I just mounted a plug to my bike to plug it in.
Another appealing feature about the draw of this system is approximately 40 watts. That is very close to 3 amps. I have a 28 amp alternator on a 1991 ST1100, so there can't be a lot of accessories to tax the available power.
If you want it to have a greater warming affect, turn your thermal liner inside out, run the wires where you want them, add a liner to cover the wires with a dress shirt or other material, and the wires will be closer to you. You will know what works best for you with a couple of try's. <br>Quite honestly, the draw is so little, if you were to buy two of them for better coverage, it will be very close to what heated gear will draw from a retailer.
have you tried hooking a plug for a battery for a drill or something like that
I know of portable heating garments. In this situation, because of the specific parameters of a 38w draw for this specific wire. A 12 volt battery wouldn't last very long, and be kind of heavy. There is much thinner wire clothing available that uses less power. <br>In this case, I took the full advantage of a running engine to supply the needs of this project.

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