I've got two bikes.
My favorite is my Honda Shadow that I bought new last February, and it's shaft driven. A little over 11,000 miles on it in the last 11 months.
I bought a used 1993 Honda XR600R this past fall, also. Chain-driven. It's a definite fixer-upper, but I've put about 500 miles on it despite some of its issues.
The chain was REALLY loose on it and worrying me. There was no more room on the chain tensioner device, so I ordered a new chain. I got on JCWhitney.com and entered my vehicle data, and got a set of sprockets to go with the chain. The chain they recommended via their vehicle compatibility matrix was a Renthal R4 Z-ring chain.
So, I get the old chain off, dismount the rear tire and change out its sprocket, swap the front sprocket, feed the chain and mount the new tire.
The master link is a seriously stubborn bugger on this chain. This is my first time doing work like this, so anecdotes from friends and youtube video is my only guide. Everyone seems to have an easy time feeding the side plate onto the master link pins, and the C-clip just slips on by hand or with a pair of light duty needle-nose pliers.
On this chain, I had to improvise a side plate press by grinding on a C-clamp. I clamp with murderous force on the thing and the side plate goes on slowly. I typically operate under the principle of "if it takes THAT much force, you're probably doing it wrong." However, an email I received from Renthal indicates that the side plate is indeed a biyatch to get into place and there is evidently a tool called a side plate press and I essentially improvised one already.
So, with the side plate in position, I try to insert the C-clip. Not happening with fingers. Not happening with needle-nose. I carefully align the C-clip with the retaining rings on the master link pin and tap it into place from behind with a hammer and flathead screwdriver. It slides into place, however the forward pin (on the belly of the "C" of the C-clip) seems to be bowing the C-clip open so that the open end of the clip isn't squeezing on the rear pin of the master link.
I'm very leery of riding the bike in this condition since it seems to me that the C-clip is rather precariously connected and the chain could theoretically come off (though that side plate doesn't seem to want to come off for anything short of significant leverage involving large screwdrivers or other prying apparatuses).
Can I use any 520-size master link to bind this chain? It's a heavy duty chain compatible with motorcycles up to 900cc and ATV's, intended for riding in filthy environments (deserts, sand, mud and such). Supposedly super-mega-awesome pin and roller seals. In the future when/if I wear this chain and set of sprockets out I'll go with a lighter duty chain and this is evidently a learning experience with overbuying on this chain, but I'd like to get my money's worth out of this chain, but I really don't like the amount of force necessary to reinstall the master link plate and C-clip. So many videos on youtube show field-expedient master links that don't require anything more complicated than a light duty multitool to disassemble, which can be useful on a dirtbike if you get a flat you have to repair while 20 miles from anywhere. Given the amount of cactus in AZ, that's extremely likely. I've already picked up cholla hitchhikers on the sidewalls of my tires in the few limited rides I've done so far.