I installed a pair of KOSO Apollo heated grips onto my Gen 3 650 yesterday (after installing the same type onto my Gen 1 during the AZ winter), and have several "observations" as a result of doing it twice onto my two Vs:
1. I removed the OEM grips using compressed-air. SUPER quick and easy!...;
2. On my '08 I wondered WHY the throttle-side grip had a (1/4"???) gap between it and the switch for the starter after the INSTALL, and upon removal of the OEM grip I saw that it has a 'flange' cut to hold the OEM grip in place on the RAISED "rib" that circles the plastic throttle-sleeve, BUT the Apollo throttle grip does NOT have that 'flange', so I VERY gently removed the "rib" w/ a very sharp blade, then used sand-paper to make it even w/ the throttle-sleeve...; and
3. Knowing that, ONCE INSTALLED, the grips are quite difficult to move to a different location (EASILY possible by turning the grips to the HOTTEST setting, and once HOT, they turn easily!), so I carefully had them aligned to where I wanted them to be, put some dishwashing soap onto the sleeve (or handlebar on the left), then used a rubber mallet to "urge" them on to where I needed them.
1. On the Gen 1 I ran power from the "FUZEBLOC" I had installed years back, under my seat;
2. On the Gen 3 I utilized the wires (thoughtfully included by 'Ma Kawi' for the 'factory heated grips', found under the left mid-fairing, powered thru the factory required relay that mounts BEHIND the headlights), but as I didn't have a Kawi connector I just soldered into those wires, c/w the Apollo supplied inline fuse; and
3. On the '08 I ran the lines under the gas-tank, back to the FUZEBLOC, but for the '15 [as it's ALL happening up front] I 'nestled' them into the space between the headlights, under the front fairing (that holds both headlights).
I ran a functional test several times - FIRST to ensure that those wires were 'HOT' before I did the soldering, then AFTER - as PROOF.
I'm looking forward to trying them out!