I have this heated vest setup, and it extends my comfortable range 10 degrees. The other key is a totally windproof light layer that goes over the vest and under my regular leather jacket. I route the cord between the bottom of my riding jacket zipper and the snap, so the switch is easy to find. If you get an older BMW vest like this it has the correct Hella style connector to the bike:

https://www.mercari.com/us/item/m55829733864/?gclsrc=aw.ds&&utm_source=google&utm_medium=cpc&utm_campaign=21931664282&utm_content=t0&adgroup=&network=x&device=c&merchant_id=126358573&product_id=m55829733864&product_id=&gad_source=1&gclid=CjwKCAiA6t-6BhA3EiwAltRFGCBkfknqLLy3qA88cXzV2cb8wCpksilFPPB8txii-HxKvFQbd8igmBoC0bcQAvD_BwE

 

Warm & Safe Heated Clothing the Warmest Clothing in the Universe – Warm & Safe Heated Gear

Not the cheapest, but made to last a lifetime, and owned by a great family of riders!

 

For over twenty years I have been using a heated Jacket liner. Full upper body cover, thin so it goes under your riding jacket or suit. Draws about 9 or 10 amps. It has a dial controller for changing from off to full on. I seldom need full on in the North west even when it is 40. The outer layer is satin like smooth material so your outer clothes slip on it. Mine is the original Gerbings, but there is a new outfit making them. His son started up making them again but I think he went out of business not too long ago.
Not cheap but wonderful. Extends the riding season. If it is a cold rainy day and your on the road it saves the day. Just remember to unplug it when you get off the bike.

Gerbing Motorcycle Heated Clothing 12V Jacket Liner & Glove Kit

Size: G4 Glove Size. Option: Jacket Liner Size (unisex) GERBING 12V Heated Clothing Jacket, Glove and Temperature Controller Complete Kit...

www.thewarmingstore.com

 

Ok tiny pex lines tapped into a slow feed off the water jacket
Genius

 

Warm n Safe heated gear is also sold under the FirstGear label. Both come with a lifetime warranty on the heated clothing. I’ve been riding with a FirstGear jacket liner and set of driver’s gloves for about 10 years in New England. It is an absolute game changer in late fall, and makes riding in freezing weather not only possible, but enjoyable, as long as there is no ice or snow on the road.

The gloves plug into cords that come out of each sleeve of the liner. To run gloves and the liner you’ll want a dual controller so you can set the temperatures independently. The driver gloves have no heat wires in the palms, so they are not uncomfortable holding the handlebar, and make them compatible with heated grips. The gloves heat the outside of your hand and the grips inside.

You’ll need an adapter to go from the BMW powerlet outlet to the pigtail connector of the controller. I mount my controller on the waist belt of my jacket. Then the controller plugs into the liner and gloves cables at the left bottom hem of the jacket. Once you get used to the hook-up it’s very easy to do. And if you forget and walk away from the bike the co-axial plugs disconnect with no damage.

Highly recommended.

 

I have been using Tourmaster heated jacket, pants and insoles for the last 10 years. I added a dual controller to the setup.

 

As you get older, you get more comfortable. Heated grips are great, but heated jackets are Wonderful! Try out the Gerbing gear. I thought about just getting a vest, yet I'm glad I got the full Jacket. It really makes a difference & depending on how you layer, you can ride in snow in just a heated jacket/grips.

Spend the $ on something that's fully adjustable. Gerbing has 1-10 settings & it's quite easy to twist the dial while riding. I'd suggest the plug in version instead of wireless. Mounts easy to the bike with Velcro & can take it off if you'd prefer to keep it on your persons.

Have fun & ride often. Don't let weather be a thing that stops you from riding!

 

I have their jacket liner from the 90's still works great. Some of the mid year ones has trouble with the connectors getting loose and loosing contact with the insert. Just squish them a tiny bit with some pliers.