Hi Clive, I fitted heated grips to my R1200GS just before Christmas and it is very easy. The parts cost £214 inc Vat, then the dealer needs to hook it up to their computer to 'enable' them at about an hours labour. I was quoted £300 to have them fitted however I asked the dealer nicely if they could enable the grips when the bike went in for its 'battery drain' software update (which is free) so I saved some money. Goodwill goes a long way as I have spent quite a bit at the dealers anyway.
To do the job you will need a set of small TORX screw bits plus a big TORX socket to undo your bar end weight.
Start by removing the bar end weights and the handguards. Note the bar ends are Loctited into place and take a bit of force to undo. On the back of the handlebar switchgear, remove the tiny TORX screws and remove the switch back covers. Inside you will see 2 more screws which hold the switchgear onto the grips, along with 2 locating pegs through the flat plate of the grip (see pic below, LH grip). Remove these screws. On the LH grip, pull back the rubber grip at the opposite end to the bar end weight and you will see 2 small torx screws holding the grip to the bar (one at 12 O clock and one at 6 o clock). Undo these and the LH grips can be removed. Replace with the electrically heated item, plug in the tiny multiplug to the switchgear and refit everything. No glue, no mess, no fuss, simple.
On the throttle twistgrip side, its slightly different as the grip is clamped by a shiny metal band onto the bar and also you need to undo the throttle cable. Unscrew the outer cable from the grip end (knurled elbow) then pull some slack into the twistgrip cable and pull out the bowden cable from the throttle twistgrip spindle. Unbolt the clamping bolt and remove the throttle twistgrip (having removed handguard bar end etc already). Replace the RH switchgear for the unit with the heated grip switch, fit the new heated twistgrip and clamp in to place then plug mini wiring connector in, insert the nipple of the bowden cable and then replace everything you undid.
Ride to the dealer and get them to enable the grip function.
Job done.
If you do it yourself and get stuck PM me, though it is all really easy and is self-explanatory.
Part numbers are:
Heated Grip 61 31 2 352 054
Heated Grip 61 31 7 671 605
Switch Gear 61 31 7 670 038
Pic below is of the old parts once removed, heated grips are near identical except for a small wire with a tiny multiplug on the end for each grip.
