I'm trying to picture where you would tour in Nepal. You could stick to the Terai I suppose, but that would be a bit dull. You could probably make it up to Pokhara but I couldn't imagine going too far into the Himalaya, or sharing the mountain switchbacks with Nepali buses for that matter. My last ride on a Nepali bus was far more terrifying than any roller coaster I've been on.

But if the bike breaks you can hire a porter to carry it for you.