I filled my tank up right to the top when I first got the bike and then I reset the trip meter.
My flashing one bar came on at around 81miles!
Is that normal for inner city traffic usage?

I have no heavy luggage and a stock windscreen.
I'm 5'11" & 90kg so I'm not a fatty either.

Fuelly is telling me
9.5 L/100km
29.7 UK MPG
24.8 US MPG

Seems like very poor mileage to me. I can usually get nearly 100 miles before the fuel gauge hit half way in mixed city and freeway riding.

Very bad I would say.

I top up at 130 miles and have two or three bars!!!

Worth investigating!!

The question that needs to be asked is... How much fuel does it take to fill it back up? If it's only a couple of gallons or less, you likely have a bad fuel sensor or such. If it is taking 3 or more gallons, then you are getting miserable fuel milage or have a fuel leak.

We had a member with a similar problem a couple of months ago, and his turned out to be a bad fuel sensor (the bike had sat for a couple of years as I recall, and it was apparently gunked up). It would only take less than two gallons to fill it up, so his mileage was OK... his system simply would not let him use all of it. He was trying all sorts of fuel system cleaners, but I don't recall hearing if that solved his problem, or he had to replace the fuel sensor.

I filled it up 2 miles after light flashing.
My Shell receipt tells me I filled up with 12.12 litres (on centre stand)
Does that sound about right?

It is possible when I first filled up I did it on the side stand (I dunno if that matters much)

Anyway I'll monitor it closely this time round.

Approx 12 litres on flashing LCD bar is very close to my consumption,
that converts to about 230 km travelling distance. in Comparison, I get about 320km
on my 660 single MuZ for 12/14 litres with the same riding style and speeds.
The Swing sure is comfortable tho.

Wait till you ride it 2 up and use some of the power.......................Last weekend I got about 150km for 10 litres 2 up
and passing speeds up to about 145km/h cruising speeds around the 110-120 mark..................................................
make a list of possible fuelstops before you leave home.

Your original post translates to about 25mpg, which is in fact poor. Since it is a new bike for you and the maintenance history is vague or unknown I would try some gas treatment (Seafoam or other injector cleaner) and I would check the air filter and maybe change the plugs. Most of us get between low 40s to as much as high 50mpgs. Good luck and welcome!

I've lost my first 2 bars already at 35 miles.

I saw another guy in another topic saying he lost 1 bar at 55miles with his big givi screen.

The servicing is all up to scratch according to the paperwork. Cant always believe what you read.

I've ordered a can of Seafoam.
On my next day off I'll be taking a look at the spark plugs and belt.

Hi,

Checking out your spark plugs is a good idea. They sure can tell allot about the way the motor is using fuel.

One of the things that might be good to look at is your Fuel Pressure Regulator. After setting for a while, they have a tendency to start leaking fuel into their vacuum control hose, connected to them and that will cause your fuel to leach off into your air intake and makes for poor MPG's.

Item # 13

Hey Dennis.
You could be onto something here.

Would cleaning it out be enough to fix it?
Ie would Seafoam clean it? Or manually open it and clean it?

or 2) would it have to be a replacement part job?

Thanks

How fast are you going at 5000 RPM ?Cruising . Need to know to tell if it is
engine or trans problem . Do you notice any raw gas smell ?

While riding I have noticed a gas smell but that's when I duck my head down around gas cap area, but I couldnt see anything leaking around the actual gas cap. I thought it could be normal.

Also to note there is a bit of white smoke when I first start the bike to warm it up in the morning. We've had a lot of rain lately so I was wondering if that's just rain water evaporating from inside the exhaust pipe or perhaps it could be caused by extra fuel that's leaked into the airbox like Dennis described.

I will find out the 5000rpm speed when I leave work.

Thanks again.
It sounds like we're getting closer to an answer.

I get white smoke from my machine in the morning, especially after a damp night. It's just the moisture in the exhaust system evaporating. If you look at most cars they do the same this time of year.

Hey P187,

The Fuel Pressure Regulator (FPR) is a replacement part only and cannot be repaired. They are around $40.00 for the part here in the states and best you replace the seal #18 also. To gain access for the repair you will need to remove the seat and the top cover under the seat.

After you get the FPR installed and before you re-install the panel and seat, run the bike and check for fuel leaks in the FI system.

Hope this helps.

For interest's sake; I returned 45 MPG on my trip to the UK at the weekend.
I was battling the elements and trying to maintain 70 MPH for over 500 miles so the Silverwing was working very hard.
Undoubtedly the MPG suffers at speeds over 60 MPH.

Thanks again as always.

I stumbled across a very interesting internet conversation.
The guy had a Silverwing with the exact same problem as me. According to him SeaFoam fixed his problem

On the left click on "View Full Conversation"
http://www.justanswer.com/questions/3s0yk-i-have-a-2003-honda-silverwing-scooter-fsc600-when-i-fill


Also while I was looking up info on the Fuel Pressure Regulator I found this convo on Silverwing org
This guy was talking about his FPR.

Quote:

I had one go bad on my 2002. Symptoms was it began getting harder to start, then not running for very long. You could smell very rich running through the exhaust, including black smoke. It finally deteriorated to the point it wouldn't start. Mine had sat for almost 4 years however, so the diaphram inside it probably rotted. Put through a tank of seafoam and she's back to brand new status!

My Seafoam came today and I'm running my first tank of it
1 oz per 1 gallon of fuel

Will see what happens.
Cheers

Good luck!!!

I'm not a believer in "miracle-in-a-can" but I do use Sea Foam in my bikes and truck fairly regularly every six months or so. The stuff did good work on my GL1500 once when it was idling a bit rough. It isn't all that expensive and hasn't hurt anything. Sometimes the 'placebo' effect is worth it if that's all that's going on.

A picture of the spark plugs.
The plug on the left was notably more oily than the plug on the right.

Hi P187,

Both plugs look gas washed...just a little to much gas entering the combustion chamber.

If all was well wth the scooter, your sparkplug electroids, should be DRY and light tan or light brown.

The plug on the right looks like you may have cleaned it up a bit with a wire brush. Is that so?
Were you referring to the oiliness being on the threads? If so, that's very normal. I don't see any oiliness on the electrodes.

Thanks again.
No wire brushes used. This is the first time I've seen my Silverwings plugs.
I've replaced them now.

So far I've reached 89 miles and I've got 2 fuel bars left.
This is an improvement over last time.

I will fill up again and give treatment of Seafoam once I hit 1 bar.

You should have that many miles at a half tank if things were normal. You should expect at least 180 miles/tank. Give or take a few. Something does seem a little out of the ordinary for your scoot. If you have replaced the plugs, after a complete tank of fuel has been used, recheck your plugs again. They should be as Dennis states above.

Most folks seem to get more miles out of their tank than I do, but even under full load and high sustained speeds, I still would be able to get at least 105 to 115 miles before the reserve light comes on. Remember, when the last fuel bar comes on, it means you have about 1 gallon of gas remaining (I know it's supposed to be 0.9 gallons but when I've filled up right as the light came on, I actually put 1.0 gallons in exactly). When the first bar goes off, you've used up 1 gallon of gas. I've reached 90 before with 2 bars remaining, but then went up to 105 before the last bar came on, so that might not be too weird.

Talking UK measurements ie, Imperial Gallons. With 2 bars remaining I have usually 130 (ish) miles registered. I have calculated with the remaining fuel I could get 180 miles per tank.

Methinks a little more investigating may be the order of the day!!!!

Doug... sounds like the problem may not be as bad as it sounds over here. It is always good to have all the factors before making decisions.

P187... you may not have a problem after all. Good news for you.