I installed Renthal 819-50-BK Bars with Yamaha B67-H29A0-V0-00 Universal Grip warmers last week and have been fairly happy with the results The Bars are approx. 30mm lower and less swept than stock. At 78cm wide, they within a few mm of the stock width. At first I thought the bars were too wide, but I've grown to like them - they kind of have a early 80's Eddie Lawson Superbike vibe.
Avert your eyes from the left mirror as I've managed to sneak an image of my bald self taking the picture. I chose the Yamaha grips because they are OEM quality, easy to install and have no extra control box. The leads on the left grip are a bit short though, and with stock bars you might have some exposed connectors, but with the lower bars the connectors tucked in nicely behind the head light. Some have complained that these grips do not put out enough heat, but they are programmable for different current draws, so read the instructions! I didn't at first. Be aware that these grips are a little less than 120mm wide including the thickened edge for the wiring and controls - so if you have large hands this could be an issue. The grips have Yamaha branding you can see below the green indicators, thus far this has not caused my Kawasaki to have any problems. Wiring
You can buy two 2.3 mm Sumitomo male terminals and seals from these guys ( http://www.cycleterminal.com/hm-sealed-series-090.html
or ebay), crimp them on the power leads of the heated grips, and then insert them in the male connector already on the connector for the factory heated grips (under the left side cover). Now your grips will plug into a fused switched power source just like factory.
The red wires are from the Yamaha heated grips which will now easily plug into the female connector just above.Misadventures with cheap handle bars
I bought some cheap no name bars based on the following diagram:
These should have been exactly the correct size based on my interpretation of the diagram. I thought that the 210mm dimension would indicate the length of the straight section for controls, but it clearly did not. These bars only had about 185mm of straight bar at the end which is less than the approximately 200mm needed to fit all the Kawasaki controls. The quality of the bars was fine, but buying no name parts is always kind of a gamble.Throttle Tube and Grip Glue
I like to be able to return a bike to stock easily, so instead of removing the stock grips from the stock bars I bought a Motion Pro throttle tube, Part number 01 1042 which was less than $10.00, came in black and worked fine. The plastic was a little harder than stock and I did have to sand off a ridge so I could install the grip a little further on to the tube (do this before using adhesive).
My wife/daughters no longer have any hair spray which is not some sort of conditioning goop so I had to find something else to stick the grips. I was also concerned that with heated grips I should use some sort of better adhesive. I was doing this on a Sunday, no bike shops were open so I had to do a little research. Checking the SDS sheet on Motion Pro's newest grip glue indicated it was mostly tetrachloroethylene. E6000 is a readily available adhesive which is good to 180 deg. F and is also mostly tetrachloroethylene so I used that and it is working fine so far. Bar End Mirrors and Vibration
The bar end mirrors I was going to use had a 15mm diameter insert. Renthal bars have an ID of ~14mm. I could have drilled out the ends of the bars, but all I had was a 5/8" bit and it would have been a pain, so I just put some cheap Amazon mirrors on. These mirrors if installed correctly work pretty well. Vibration in the mirrors or handgrips has not been a problem even without the standard bar end weights, but people have different sensitivities to this.
One more picture from the front: