We rode to the drag strip one Saturday, and all these older Harleys rode in right after us. It was cool, since most times it's a sea of Twin Cams ! That's dad's ol' '65FLH (nearest) running a late model CV carb and Spike timer. The last few days he's been fabricating a 42mm Mikuni flat slide. He had it running in the garage, and said, "It's definitely more responsive." The CV has a flat spot about off-idle that we just can't seem to ditch . . . it runs ok, but ok sometimes ain't good enough, (you know what I mean)
TV ads at the pump. When you pay with your credit card, the gas station sends your information to the advertising company. The station is paid by the advertising company. Now the advertising company knows... Where you live, Your address, What time you got fuel, What items you bought at the station(if you purchased food, etc.) . . . Now the advertising company can sell your information to Wendy's Hamburgers, Marlboro, Wal-Mart, whatever local business is in your area. They may call you (telemarket) for more services. I might have to start paying cash and shutting off my pump TV with my ball peen hammer? Stick a big microwave magnet on the screen. This is war now ! This is coming from a guy who usually has to buy a new television remote 'cause the MUTE button on my original remote is worn out from silencing all the commercials when I watch a program. This gas station deal is just the latest invasion of privacy - no wonder they what to do away with cash sales ! I feel sorry for you people in the big cities - now you'll have to wait to use your card until you watch the ad (ends in 5 seconds). At least small town Iowa has old gas pumps left.
I had the valve head "lip" machined off (uncut valve on the right) to aid in flow between the valve and the head. Jerry Branch found the best flow with +.120 to +.150 above the intake valves. The Eastern Part No. 18070-54N(N for Nitrite). Nitrite coatings are proven to decrease valve "stick" and add to the life of your valve and guide. Kibblewhite valves are also a good choice.
After I grind the 45 degree on the valve, I re-adjust our Kwik Way valve grinder to 15 degrees and take that small edge off at the top of the 45 . . . Our engine building friend (I'll just refer as, Radar) told me that little bevel increases port air flow and efficiency "about as good as anything." Since the air and fuel is coming in - flowing towards the bottom of the valve, we don't need that lip messin' up our path.
Bottom Valve: The bottom valve just looks better . . . There are few aftermarket products that are ready "right out of the box" . . . but these valves at least may be modified to your liking. It was easy, everybody would do it.