I bought a spare OEM clutch cable to carry in case I broke one far from civilization. The OEM clutch cable is massive: While the wire itself is only 2 mm, with the outer casing, it's 10mm (0.4") in diameter for almost it's entire length; it's 123 cm (48.4") from the bottom to the bend at the top and another 7 cm (2.8") after the bend; and when I tried to coil it to stow it on the bike, the smallest it wanted to coil was the size of a basketball. For me, that's too big to drag around just-in-case.
This lead me to searching for an emergency clutch repair kit. There are lots of kits out there that claim to be universal, but I wanted one that specifically said it fit a G310GS. I couldn't find one; if you know of one, please share the info and link for it.
So I collected more info from my spare OEM cable so I could judge the universal kits: The clutch hand lever fitting is 8 mm diameter and 10 mm high. The clutch engine lever fitting is 6.2 mm diameter x ~6 mm high necking down to 3.9 mm diameter x 5 mm high which then necks down conically to cable itself. Both are soldered to the wire, but an emergency repair kit typically has screw-on fittings for one or both ends. This allows you to pull the broken wire out of the casing; thread the new wire through the casing; and attach the screw-on fitting to the end you threaded through the casing. I couldn't find a single universal kit that provided enough detailed information on their fittings to assess if they would or wouldn't work for a G310GS.
During my search, I did find a kit at Wunderlich just 6 miles from me, so I stopped by with my spare cable in hand. They pulled out one of their kits, but its wires were only 1 mm and 1.5 mm, so they couldn't recommend using their kit. When I searched more, I found that a lot of kits have these smaller diameter wire sizes.
More searching turned up components I thought would work. I ordered them and compared them to my hand and engine clutch levers. Motion Pro's 2 mm wire has the correct hand lever fitting soldered to one end and the wire is certainly long enough at 165 cm (65"). Dorman's 3/32" (2.4 mm) wire cable stop should suffice as a fitting to pull on the engine lever, but, because it's not the correct shape for retention by the lever, you also need a few inches of safety wire (preferably stainless steel) to wire around the fitting on the engine lever so it won't slide off the lever.
So, my self assembled emergency clutch repair kit, which coils nicely into my Dynaplug tire repair pouch, includes:
*My spares and repairs kit includes about 100 cm (39") of Brookstone 0.032" (0.8 mm) Grade 302 Stainless Steel safety wire. I bought a 1 lbs. (0.45 kg) can of this wire a couple decades back and it's still over half full. When I search for this wire now, I don't find Brookstone, but I do find many sources for the same size and grade wire described as aviation safety wire. Here's one Amazon Prime Same-Day/Free Returns source:
https://www.amazon.com/Malin-MS20995C-Stainless-Safety-Lockwire/dp/B005VR49D6
**My tool set includes a Leatherman with needle nose pliers that have a wire cutter.
If you want to know more about the tools, spares, et al., that I carry, go to:
G310GS Ultimate Tools List