I bought a Baron's Mini Tachometer from
www.PhatPerformanceParts.com and it arrived today, one day ahead of schedule.
It's a blackface 8k rpm.
http://www.phatperformanceparts.com/merchant2/merchant.mvc?Screen=PROD&Produc...Here's some pix of it on my bike on my site:
http://freepages.genealogy.rootsweb.com/~gitarzan/tach/, sorry it's kinda dark, but I took it with a flash on a dark patio.
I used a cable bracket for a mount. I went to EasyRiders here in town and got the bracket and a longer allen screw. Lowes provided me with rubber washers and some bonded bronze/rubber washers. I also grabbed an old RadioShack grommet from my junk wall in my shop.
The hardest part was rigging up a bracket and getting the tank off. The tank removal wasn't that hard but it was sticky
and I had to pull the gascock off in order to get it off. That meant I had to drain the gas first.

Finally it all was removed.
There's four wires on the tach. I had wrapped the black cable in chrome covering, (I'm a very *friendly* person for chrome) and fed it back to the Coil. One wire goes to the neg side of the coil, two wires go to the pos side of the coil and one wire gets ground. That's it.
It's steady, due to my rubber mount I came up with and the needle action is smooth. AND IT LOOKS COOL.

And I'd really rather know what my RPMs are than go by the seat of my pants and my ears. Guess what. It's lower than you might think. At least to me. I used to have a 2 stroke that revved to 7krpm like it was nothing. More on this part at a later date.
I may tweak the mounting setup at another time, but for now it's fine and it's at a real easy to read distance for me (young guys, that will become an important issue for you too when you reach about 40).
While I had the tank off, I also replaced the dead bulb in the bright light indicator and hopefully got rid of a ferocious speedo squeak. I noticed that the rubber gasket around the console was squished under and mashed and such. I carefully pulled it back to it's original position and put the speedo console back on. Hey, the squeaking stopped! I was suprised it took that little bit of fiddling with. I had visions of dumping silicone seal all over the place. That was worth the whole job. Man, that speedo squeaking and buzzing drove me nuts.

The tach isn't off center the camera is, so the flash doesn't glare out the dial...