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Old 03-15-2009, 12:15 PM   #61 (permalink)
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Originally Posted by Centurion View Post
1982 Kawa Twin 750. 38 tooth rear sprocket - about 40mpg. I looked at changing the rear sprocket and used, "Gear Commander" to figure out that a 30 tooth rear sprocket would do the trick.

One-up driving - for a tank, my best has been 73mpg. I had one tank, that I will not comment on, it was high, really high!

Two-up with my sweetheart, I normally get 58 to 65 mpg. - Thats imperial gal. We use liters up here for fuel and I have been driving since Gas was 50 cents to fill a 1 Imp Gal Laquer thinner can to the very top.

My worst was a 1978 Suzuki GT 380, with the Secret Agent Blue smoke screen function. 5.5Gal tank and it never got more than 23mpg, and ran out of gas 5 times with it. The last time it ran out of gas, I pushed it 2 miles to a Station, filled it, drove it home, and put a "For Sale" sign on it. Nuff of that!

Cheers - I'l post a pic later - have one over at the blog. Centurion
i was thinking about re-gearing my 600F4i. has anyone else regeared a 600-750cc bike, and what kinda mpg were you getting? seems to me if you can have ~100 hp on a bike and still get 60-70mpg, that would be amazing: great acceleration and great mpg

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Old 04-04-2009, 04:35 AM   #62 (permalink)
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Pizza Geo - '92 Geo Metro
Last 3: 47.52 mpg (US)

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90 day: 108.96 mpg (US)

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90 day: 15.6 mpg (US)

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90 day: 35.65 mpg (US)

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I get around 94mpg on my Yamaha C3. Supposedly you can get around 115 if you're willing to put around at 40km/hr but I can't see myself getting away with that unless it were the middle of the night, at which rate I'd almost rather just ride a regular bike. I tend to ride it near its max of 60km/hr, though I believe that the bike is fairly heavily restricted in terms of revs. It would be really nice if there was a way to shift into neutral, but I haven't figured out any yet. (It's a CVT)

I realize things would probably go better if I did some vetter-style aeromods, but I just don't have like...ANY skill at all in that department, sadly.
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Old 04-05-2009, 11:58 AM   #63 (permalink)
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My buddy has a set of Yamaha street bikes(R1, R6 and a few 250s), but the bigger the engine displacement the maximum limit decreases. anything over 1 liter on a bike and you will struggle to punch 40 whereas I've used his 250 to get 60s riding it pretty hard(I weigh a scant 138).

Although. . .If you really wanna push it the "ugly" Cd part of a bike is higher off the ground than a car. Which is ideal for tractor trailers because at my car's nose there is not alot of shielding because its by the tires, but a bike has most of its mass behind the actual doors.

I commuted 40 miles on the highway and intentionally waited for a trailer to leave to and checked it on the other side and it was only a third of a gallon. I could have broken my headlight on his step-bar pretty easily though. Wouldn't recommend it. . .
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Old 04-05-2009, 07:35 PM   #64 (permalink)
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Originally Posted by theunchosen View Post
Although. . .If you really wanna push it the "ugly" Cd part of a bike is higher off the ground than a car. Which is ideal for tractor trailers because at my car's nose there is not alot of shielding because its by the tires, but a bike has most of its mass behind the actual doors.

I commuted 40 miles on the highway and intentionally waited for a trailer to leave to and checked it on the other side and it was only a third of a gallon. I could have broken my headlight on his step-bar pretty easily though. Wouldn't recommend it. . .
I think I just gave myself an aneurysm trying to understand this.
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Old 04-05-2009, 08:20 PM   #65 (permalink)
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lol yeah thats pretty poorly written.

I was tailgating a semi at somewhere less than ten feet. Doing it in a car works pretty well but on any form of bike its more effective because the largest vacuum is higher from the ground and closer to the middle. A car is almost as wide and my car is almost ALL below the trailer so I completely miss all the "good" vacuum. A motorcycle or bicycle on the other hand your torso could be in the middle horizontally and at least inside the actual profile of the freight container. Freight profile is about 4 feet off the ground and your torso on a motorcycle or bike is about there so its completely shielded by the trailer.

You can also stay in the center of the trailer and avoid the wake, while staying completel inside the vacuum area.
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Old 04-07-2009, 11:05 PM   #66 (permalink)
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l&s' Jag - '00 Jaguar S-Type SE
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Hi, My best tank average was around 61 mpg ( US) on my 1982 Yamaha Vision. This is a 550 cc, inline V-twin with shafy drive. It was done in hot weather and mostly freeway miles during a trip from my home in SF Bay Area to the Colorado mountains.
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Old 04-14-2009, 10:21 PM   #67 (permalink)
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Piaggio loves it's riders

Hi,

I just joined the EcoModder forum and since I am a scooterist, decided to give my 2 cents worth on MPG. I ride a 2007 Piaggio MP3 - 250cc 3-wheel scooter that has 2 front wheels and average 65mpg regardless of my riding style. My daily commute is 10 miles each way on city roads that average 35-50mph. I was getting closer to 70mpg with the factory windscreen but replaced it with a taller windscreen that protected me from biting windchill on my rides to work this winter when the temp dropped into the high 30's and low 40's.

Love this forum,
Jerry
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Old 04-16-2009, 07:09 PM   #68 (permalink)
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Last year when gas hit $4 per gallon I convinced the wife it was time for me to get a motorcycle again. I hadn't ridden for 28 years when I flew over a car. (It cut me off in the snow.)

I picked up a 1985 Suzuki GS300L for around $400 including the cost to have the carbs cleaned out. The saddlebags came from ebay, rear rack was $10 at a scrapyard, windshield was $40 on ebay.

It paid for itself last summer in gas savings versus my trucks. I normally get around 60 something. The best tankful was 67 MPG, the worst was 54 MPG.

Oh, and the bike RARELY goes beyond 40 mph since I live in the same town I work in, 4 mile round trip commute. The town speed limit is 35 unless otherwise posted.

I like the styling of the older cruiser style bikes. They don't make bikes like this anymore, a small bike with big bike style.


Last edited by stanz; 04-16-2009 at 10:35 PM..
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Old 04-22-2009, 03:04 PM   #69 (permalink)
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Saturn SL1 - '93 Saturn SL1
Last 3: 38.37 mpg (US)

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90 day: 44.63 mpg (US)

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90 day: 29.13 mpg (US)

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90 day: 14.96 mpg (US)

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The best I've seen so far is 45mpg, and that was 95%hwy and dwb through town and short shifting (around 2500.) And this is in need of carb work (coughs a bit on decel, and occasionally knocks off when I downshift.) It's a 1995 Yamaha Virago XV1100
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Old 04-23-2009, 11:20 PM   #70 (permalink)
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Georgia - '03 Chevrolet S10 Extended Cab Stepside LS
Last 3: 26.99 mpg (US)

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I have a 2007 Yamaha R6S. My best tank is 53.I don't remember commuting to work. I ride fairly conservative but always "air it out" a few times a tank. This is my first fuel injected bike, not having to use a choke is pretty damn nice.

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