Maybe the quieter helmet makes you sit up more, or go a little bit faster, as the buffeting doesn't put you off as much?
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no change with todays trip.
So I guess the conclusion is I need better measurements. I think testing a bike like this is not going to work. 98miles / 1.8 gallons = 54.44mpg Seeing as how the pump only reads to a .1 increment I figure a +/- of .07 gallons would be reasonable. so that gives a range of 52.4 to 56.6 so really .5mpg means nothing other than I sometimes go a mile or so extra and get lunch so that slightly changes my numbers but there is not enough accuracy in filling up to be able to see the change. So I guess that means in order to test a bike I need a much bigger tank to minimize the errors. Either that or maybe figure out a way to weigh the gas so I can get a more accurate idea of my fills. I might try getting a pair of bathroom scales and put the bike on it before and after a fill and see if the difference in weight gives better sensitivity than the gas pump. One gallon weighs from 5.8 to 6.5 pounds, depending on the temperature when you weigh it. So I think coming up with a decent system to weigh the gas might be hard but not impossible. Getting gas in a measured container and using that to fill the tank might also be an option. Once there is an accurate way to measure the gas I might be able to redo this experiment. |
I was considering trying the trip wire on an older helmet I had as well. The classic diagram of the sphere with a trip wire has the wire ahead of the largest cross sectional area. I can't find the image right now, but I'm sure you know which one I'm taking about.
I wonder if the gains would be better having the tape across the forehead, maybe along the upper edge of the visor so it doesn't interfere with operation. I know this is an FE mod, but on mine I'd probably just gauge success by reduction of stress on my neck, and helmet noise, no? |
I can't remember where all I tried it at but where it is in the pictures is where it had less pressure on my neck. I ran it towards the front and farther to the back but for how I sit on my bike were it is at is how it worked good.
I changed helmets a bit after I tried this and the new helmet is way quieter and doesn't try and push my head back like the old one so I haven't bothered with the foam on it. I think this is one of those things that you can do for practically no cost so you might as well try it. A 25ft or so roll of that foam insulation tape is like $3 at a hardware store. You can put it on the face shield opening to help seal it and make it quieter so it is handy to have either way. |
At higher speeds at places like Daytona, we get a lot of buffeting from the air flow off the front windscreen even when you're down on the tank. Braking into the chicane and into turn one, you pop up to use your body to break the wind, get a better view, and use some leverage to turn the bike.
At the highest speeds, there's enough drag on some helmets that you get a real lift on the helmet that makes you feel that it's getting sucked off the top of your head. The manufacturer of the helmets that I use, changed the top of the helmet to change some of the ventilation and to reduce that lift. This was the original helmet shape. https://www.canellamoto.it/Suomy-Spec-1R-Hodgson-dx.jpg This is the "extreme" design shape. Notice the little rear spoiler. It's just a plastic piece glued to the top of the helmet. Thin too. I can push them in with my finger, and they flatten out, or break, depending upon the impact. https://www.kneedraggers.com/image_st...0fe4_rough.jpg I can't say that it helped our fuel economy, but at speeds probably above 100, there was a real difference in how it felt. Seems like you might be going in the right direction. |
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Can you please post more pics showing other helmet mods, esp. those making the helmet quieter? Mine are always too noisy. |
Ear plugs work the best for quiet. That's what we wear when racing. Eliminated the high frequency sound of wind, but I can hear my engine, even mechanically, and other bike's I'm racing with behind me.
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I ran with a Gibli helmit for year because it was totally smooth on the outside with a flush flip up visor. But I added a flap of soft vinyl under my chin between the helmit and my neck and taped it to the bottom leading edge and that totally quieted the helmit. Usually more padding under the ears and back of the neck to seal the helmit more is also good in cold weather.
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Easy on the Iron Butt types, people. It ain't easy riding a thousand miles in a day.
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