LOUSY GAS MILEAGE ON 150cc

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LOUSY GAS MILEAGE ON 150cc

Postby Angiem » Tue Jun 16, 2009 12:24 pm

I keep hearing how we can get 60-85 mpg on these mopeds, scoooters, whatever you call them. I have a lance Vintage 150cc and I don't get anywhere near that. Closer to maybe 25 or so, IF I'm lucky. What am I doing wrong?
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re: LOUSY GAS MILEAGE ON 150cc

Postby JD » Tue Jun 16, 2009 8:20 pm

25 MPG??? You've got a serious problem. A Harley will do better than that. As will my Subaru.

Are the brakes stuck? Do the wheels spin freely? Do you weigh 500 lbs.? Are you leaking gas on the ground? I can't figure out how the engine could go through that much gas without fouling the spark plug in the process. How does it run?

How big is the tank, and how far can you go on it?

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re: LOUSY GAS MILEAGE ON 150cc

Postby Angiem » Tue Jun 16, 2009 8:50 pm

My tank holds 5.4 liters. How's that in gallons? It rides really well, though maybe a bit rough idling... which is normal for its size, right?
I'm serious, I do not get anywhere near what the seller told me I'd get: 75-85 mpg, not even close.
I guess the best way to check is to fill it up, note the odometer, then ride it til it's empty and note the odometer, right? Has to be a better way than to have to run out of gas to check it.
Any other ideas?
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re: LOUSY GAS MILEAGE ON 150cc

Postby John » Tue Jun 16, 2009 8:54 pm

Is the choke working?
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re: LOUSY GAS MILEAGE ON 150cc

Postby Tab » Tue Jun 16, 2009 8:55 pm

I would almost bet that your auto-choke is defective. Did you look at your plug? Is it black?

It's either that...major gas leak...or your valves are way out of spec.
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Re: re: LOUSY GAS MILEAGE ON 150cc

Postby JD » Wed Jun 17, 2009 6:59 am

Angiem wrote:My tank holds 5.4 liters. How's that in gallons?


About 1.4 gallons.

No, you don't need to run out of gas to check it, of course. Fill the tank, ride for a while, then measure how much gas it takes to refill the tank.

Divide the miles ridden by the gallons consumed and you've got miles per gallon. Not rocket science.

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re: LOUSY GAS MILEAGE ON 150cc

Postby maddog » Thu Jun 18, 2009 12:12 am

The mpg ratings pertain to 49cc 2 stroke engines which get far better mpg than a 4 stroke engine.
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Re: re: LOUSY GAS MILEAGE ON 150cc

Postby JD » Thu Jun 18, 2009 6:04 am

maddog wrote:The mpg ratings pertain to 49cc 2 stroke engines which get far better mpg than a 4 stroke engine.


Not in my world.

Two-stroke engines typically generate more horsepower than four-stroke engines of similar displacement, but the later are far more fuel efficient. because they don't have as much unburned fuel running out the tailpipe.

My 49cc two-stroke scooter goes about 60 miles on a gallon as gas. The 151cc four-stroke version of the same bike goes about 80 miles. Three times the displacement just about doubles the horsepower and improves fuel economy by one-third.

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re: LOUSY GAS MILEAGE ON 150cc

Postby Tab » Thu Jun 18, 2009 7:19 am

Yeah...4-stokes are more economical. 2-strokes are faster. That MP50-TM I had would get 100 -110mpg with a 100cc 4-stroke engine. My Puch is lucky to see 70.
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re: LOUSY GAS MILEAGE ON 150cc

Postby maddog » Thu Jun 18, 2009 9:57 pm

check out the 2 stroke fuel injected marine and snowmobile engines, close to 2 times better fuel milage of a 4 stroke- i rest my case!
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re: LOUSY GAS MILEAGE ON 150cc

Postby moebobbie » Fri Jun 19, 2009 7:49 pm

Hey Maddog,

I would certainly hope that riding a boat or snowmobile down the highway you would be getting better gas mileage out of them. What's the vehicle towing them getting???

sorry! just couldn't resist....
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re: LOUSY GAS MILEAGE ON 150cc

Postby maddog » Thu Jun 25, 2009 2:40 am

well my 49cc italjet dragster gets 85mpg at 55mph and my old hodaka combat wambat 250cc on/off road got 650 mi.to the tank with a 5 speed trans, can a 4 stroke even come close, i can't resist being right!
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re: LOUSY GAS MILEAGE ON 150cc

Postby Tab » Thu Jun 25, 2009 2:03 pm

My 250cc Honda 4-stroke used to get 200mpg at 300mph using stale unleaded gas and butterfly tears.
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re: LOUSY GAS MILEAGE ON 150cc

Postby Ray Casci » Tue Jun 30, 2009 1:55 pm

Hi,
Does the bike have a air pump? If so that mite be some of your problem. I have a new scooter and was getting crummy gas milage, I called the dealer , he told me to clog the air pump and it did help. If the 150 comes with a pump I wou
ld look there to. And all the spots the other members came up with. Ray....
Enjoy life,Treat others like family. Ray.
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