Great advice already and so I wont add anything new at this point but just to say stuff happens as Stu points out:
Here are a few examples all on my 1974 CB750
1. Here is my CB750s with some other SOHCs on the side of I-59. I got a rear tire puncture (see wheel off the bike) within 5 miles of same spot I got a front tire puncture 2 yrs previous.
![](http://i141.photobucket.com/albums/r58/andy750/EasyRidersonI59MS.jpg)
2. Screw backed out under the shifter cover and prevented me from down or upshifting - this happened the first time in the middle of nowhere in Mexico. Took a moment to think about it, pulled the cover after it cooled down (it was a hot sunny day (100F) at the time) screwed it back in and was on my way.
3. Chain snaps on road to Georgia. Limped to the Georgia Welcome center using the masterlink to hold it tentatively together. Replacement chain found and on my way.
4. While riding some gnarly roads in the Mexican hinterlands the bike cuts out for no reason (well no obvious reason) - another hot day and stripped bike, checked connections, put everything back together and it all worked again. Never another problem after that. Stuff happens!
5. Speedo cable snaps while riding up a mountain pass.
6. Wake up one morning while camping at Devils Tower, WY and find I have a front tire puncture. Temps are at 32F brrr. No air pump with me and have to borrow one from a cyclist which gets me 10 miles down the road. Need to flag down a car to borrow an air pump to get me the final 10 miles to Sundance, WY where I can fix the puncture at a local Harley shop.
Just a few examples that stuff does indeed happen. Even if these trips had been done with a modern bike a different set of problems may have arisen such as failed rectifier (VFR), failed fuel pump (and FI bike), failed spline on a drive shaft (e.g. BMWs) etc etc...and punctures can happen to anyone.
Just go for it - every long distance road trip is an adventure.
cheers
Andy