Ok, here's the scoup! On most any motorcycle you will want some sort of a weighted end cap to help dampen any vibration that will be transmitted from the enging to the handle bars. These weighted end caps come in various sizes and weights depending if they are OEM or after market. As was stated by ionbeam, the heated grips that are offered for the Gen 1's by Yamaha are really not a Yamaha item but an after market item being sold by Yamaha and with connectors to allow connection to Gen 1 harneses. And yes, they are shorter (by approx 1/2" then the stock grips that came with the bike. Infact, most heated grips sold are indeed shorter then the stock grips. Not quite sure why they are made that way but probably most bikes have slightly shorter grips and they comprise a larger share of the market they the FJR sales do. Anyway, if you do install the heated grips (as it appears you did) on your Gen 1 you are going to want to also get the bar end weights to install, not some 'plastic' end caps. It does make a difference! Now you will also notice, as Ionbeam mentioned, that you will have a gap either at the front of the grip (where your controls are) or at the back of the grip where the bar end weight should be. From my point of view I did not like either so here is what I did. I cut 1/2" off the end of the bar, drilled the bar end with a 49/64" bit and installed new (from Yamaha) rubber mounted bar end fittings to allow attachment of the bar end weights. It makes the whole installation of heated grips look professional and does not require relocating and of the handle bar controls. I know it's a lot of work but when done it doesn't look like a cluge as I've seen on so many other heated grip installations.
I'm thinking you could just grab some bar end weights, a couple of bolts, and give 'er a different look.
