Ok, let me get this straight - you're in Holland at home, the bikes are in Nepal, and you're going to fly out and ride them to Greece?
If so, then since it does indeed sound like gearbox trouble - although how BOTH of them have the same problem I can't imagine, but ...
I'd recommend visiting a bike wreckers and buying a coule of used bottom ends, strip and rebuild the innards as needed, and take the innards with me to Nepal. Swap out the innards on the spot and you're good to go. They are very easy to work on, and you can do both in a day easy. Especially when you've had a chance to have a little practice at home beforehand and know exactly what to do.
It would be nice to just swap out the whole crankcases, but the numbers won't match so that won't work.
I'd also take a spare piston and rings set as spare, and a couple of rings sets and small end bearings and circlips to put in while it's apart. Deglaze the cylinder and you're good to go. A couple of quarts of good 20W-40 oil too.
Good luck, and keep us posted! You should do a blog on this trip, should be worth watching! See the Travellers stories link on the left.
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Grant Johnson
Seek, and ye shall find.
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One world, Two wheels.
www.HorizonsUnlimited.com
__________________
Grant Johnson
Seek, and ye shall find.
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Inspiring, Informing and Connecting travellers since 1997!
www.HorizonsUnlimited.com
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