Tue Nov 16, 2021 4:06 pm

Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
 
Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
Tue Nov 16, 2021 4:06 pm linkquote
Hi, I own a 2017 BV 350. When I turn the ignition on the fuel needle moves all the way to the right (Full) but then goes all the way to the left (empty)and remains there and the fuel light blinks continually. I know for sure there is a full tank of gas. I was wondering if anyone else had this problem and what their remedy was. Thank you
Wed Nov 17, 2021 10:54 am

Hooked
Piaggio Bevery 300 ie - 2012
Joined: 08 Aug 2021
Posts: 232
Location: Belgium
 
Hooked
Piaggio Bevery 300 ie - 2012
Joined: 08 Aug 2021
Posts: 232
Location: Belgium
Wed Nov 17, 2021 10:54 am linkquote
35Chief wrote:
Hi, I own a 2017 BV 350. When I turn the ignition on the fuel needle moves all the way to the right (Full) but then goes all the way to the left (empty)and remains there and the fuel light blinks continually. I know for sure there is a full tank of gas. I was wondering if anyone else had this problem and what their remedy was. Thank you
Did you experience gradually a problem with the fuel level? I mean after filling up not at max and then gradually after every fill up lower? Then it could be a leaky fuel tank float.
If it happened from one moment to the next then probably there is a problem with the sender.
Wed Nov 17, 2021 11:43 am

Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
 
Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
Wed Nov 17, 2021 11:43 am linkquote
Hi, Thank you for responding to my problem. It happened going from 1 fill up to the next. One day the fuel gauge worked as it should and the very next day it exhibited the problems I described. What is involved in dealing with the sender ?
Wed Nov 17, 2021 2:58 pm

Hooked
Piaggio Bevery 300 ie - 2012
Joined: 08 Aug 2021
Posts: 232
Location: Belgium
 
Hooked
Piaggio Bevery 300 ie - 2012
Joined: 08 Aug 2021
Posts: 232
Location: Belgium
Wed Nov 17, 2021 2:58 pm linkquote
35Chief wrote:
Hi, Thank you for responding to my problem. It happened going from 1 fill up to the next. One day the fuel gauge worked as it should and the very next day it exhibited the problems I described. What is involved in dealing with the sender ?
So you found the problem from one day to the very next. Not after a refill?

The sender and the fuel float are one part. It is a tube like part in front of the filler cap underneath the center body work of the BV 350. Robot from San Diego explains you how to remove the body work on a BV 350
I think it is not an easy job. You can use your trip counter as an alternative.
Wed Nov 17, 2021 10:39 pm

Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
 
Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
Wed Nov 17, 2021 10:39 pm linkquote
Hi, What happened was that after a previous days ride on the next day I just topped off the tank and when I started the bike that was when the fuel gauge problem surfaced. I have run down the tank a few times since and refilled it but that has not changed things. Thank you for the video, it does appear much more than I would want to get into trying to get at the sender.
Thu Nov 18, 2021 12:14 pm

Hooked
Piaggio Bevery 300 ie - 2012
Joined: 08 Aug 2021
Posts: 232
Location: Belgium
 
Hooked
Piaggio Bevery 300 ie - 2012
Joined: 08 Aug 2021
Posts: 232
Location: Belgium
Thu Nov 18, 2021 12:14 pm linkquote
So it was after a refill. That does not sound as a problem with the sender. Maybe the float is for some reason blocked down in the tube?

Anyway, if you want to solve it you will have to get to the fuel tank.
Which is quite a job, indeed, and also not something that I would do just like that.

Or you have it solved, or you use the trip counter.
You have quite a good idea how long you do with a full tank of fuel, I am sure.

From my tanking data I see that I fill up the tank on average every 285km. Between 270 and 310km. I fill up typically not long after the fuel warning light goes on, although the BV will easily do 350km on a full tank.
So with a broken fuel gauge I would put 300km forward as the point to refill my BV.

Your BV 350 has the same tank but will maybe consume a bit more than my BV which is a 300.
Thu Nov 18, 2021 12:46 pm

Addicted
2019 Supertech (EURO3/APAC)
Joined: 17 Nov 2020
Posts: 702
Location: Melbourne, Australia
 
Addicted
2019 Supertech (EURO3/APAC)
Joined: 17 Nov 2020
Posts: 702
Location: Melbourne, Australia
Thu Nov 18, 2021 12:46 pm linkquote
Could it be an issue with the fuel evap canister? Common issue on Vespas
Thu Nov 18, 2021 12:54 pm

Moderatus Rana
MP3 250 and 2 MP3 500s
Joined: 11 Jul 2008
Posts: 22159
Location: Nashville, Indiana
 
Moderatus Rana
MP3 250 and 2 MP3 500s
Joined: 11 Jul 2008
Posts: 22159
Location: Nashville, Indiana
Thu Nov 18, 2021 12:54 pm linkquote
steelbytes wrote:
Could it be an issue with the fuel evap canister? Common issue on Vespas
While I haven't heard of this particular problem being caused by the evap crap it is still worth removing anyway do to other problems it can create.
Thu Nov 18, 2021 2:01 pm

Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
 
Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
Thu Nov 18, 2021 2:01 pm linkquote
Hi Fellow travelers in the world of scooters. Thank you for the ideas. I think I will leave the tank well enough alone and look into the fuel evap canister idea. I will search the forum on how to tackle the removal. Would there be any negative side-effects to the bike if I do this ?
Thu Nov 18, 2021 2:44 pm

Hooked
Piaggio Bevery 300 ie - 2012
Joined: 08 Aug 2021
Posts: 232
Location: Belgium
 
Hooked
Piaggio Bevery 300 ie - 2012
Joined: 08 Aug 2021
Posts: 232
Location: Belgium
Thu Nov 18, 2021 2:44 pm linkquote
35Chief wrote:
Hi Fellow travelers in the world of scooters. Thank you for the ideas. I think I will leave the tank well enough alone and look into the fuel evap canister idea. I will search the forum on how to tackle the removal. Would there be any negative side-effects to the bike if I do this ?
The most simple way to check that is by starting your engine with the fuel tank open, so with the filling cap off. Then there cannot be an evaporation problem.

Do not drive the scooter like that, fuel will spill over, just have the engine running with the scooter on the center stand and check the gauge.

I expect it will not make a difference. But I could be wrong, off course.
Thu Nov 18, 2021 3:13 pm

Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
 
Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
Thu Nov 18, 2021 3:13 pm linkquote
Hi, I will try removing the cap and see what happens. I did do a search on Modern Vespa.com and did come up with great information and photos on how to remove the evap. canister on a BV 350
Fri Nov 19, 2021 8:52 am

Veni, Vidi, Posti
2007 LX150 2015 GTS 2013 BV 350
Joined: 13 Sep 2012
Posts: 10337
Location: Fond du Lac, Wisconsin
 
Veni, Vidi, Posti
2007 LX150 2015 GTS 2013 BV 350
Joined: 13 Sep 2012
Posts: 10337
Location: Fond du Lac, Wisconsin
Fri Nov 19, 2021 8:52 am linkquote
35Chief wrote:
Would there be any negative side-effects to the bike if I do this ?
Nope.
Fri Nov 19, 2021 10:32 am

Sponsor
Granturismo 218
Joined: 04 Feb 2013
Posts: 7074
Location: NWAOK
 
Sponsor
Granturismo 218
Joined: 04 Feb 2013
Posts: 7074
Location: NWAOK
Fri Nov 19, 2021 10:32 am linkquote
Have someone hold the bike up, pick the rear up about 8 inches to a foot and drop it. Do it a couple times. Or ride it off a couple curbs. I've seen this jar a stuck float loose.
The problem is with something that measures or shows the fuel level, and it could be as simple as an unplugged connector. Troubleshoot this circuit before you start diving down rabbit hole because that seems easier.
Fri Nov 19, 2021 11:22 am

Veni, Vidi, Posti
GTS 300ABS, Buddy 125, Buddy Kick 125
Joined: 29 Dec 2007
Posts: 12217
Location: Oregon City, OR
 
Veni, Vidi, Posti
GTS 300ABS, Buddy 125, Buddy Kick 125
Joined: 29 Dec 2007
Posts: 12217
Location: Oregon City, OR
Fri Nov 19, 2021 11:22 am linkquote
35Chief wrote:
I think I will leave the tank well enough alone and look into the fuel evap canister idea. I will search the forum on how to tackle the removal. Would there be any negative side-effects to the bike if I do this ?
Well, the largest drawback is that it is extremely unlikely that disconnecting the evap system will fix your fuel gauge. The other drawback is that you will have disabled the bike's ability to avoid venting significant amounts of fuel vapor into the air. Because of the low position of the fuel tank in the BV350, the fuel evap system on this model tends to be quite reliable. I'm guessing you are chasing the wrong horse.
Fri Nov 19, 2021 1:01 pm

Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
 
Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
Fri Nov 19, 2021 1:01 pm linkquote
Hi All, Thank you for the most recent ideas, please keep them coming. I think I will hold off on removing the evac. canister. I did remove the fuel cap and started the bike no change on the fuel gauge. I am going to try the bounce it a couple times technique tomorrow.
Fri Nov 19, 2021 1:48 pm

Hooked
Piaggio Bevery 300 ie - 2012
Joined: 08 Aug 2021
Posts: 232
Location: Belgium
 
Hooked
Piaggio Bevery 300 ie - 2012
Joined: 08 Aug 2021
Posts: 232
Location: Belgium
Fri Nov 19, 2021 1:48 pm linkquote
35Chief wrote:
Hi All, Thank you for the most recent ideas, please keep them coming. I think I will hold off on removing the evac. canister. I did remove the fuel cap and started the bike no change on the fuel gauge. I am going to try the bounce it a couple times technique tomorrow.
Bouncing it may loosen the float. But do not expect too much of it. Just by riding the scooter it gets enough bounces I expect too loosen it, unless you always drive on perfectly smoothless roads.

Also the unplugged connector you can forget. That connector will not suddenly unplug while you are filling up.
Sat Nov 20, 2021 2:22 pm

Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
 
Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
Sat Nov 20, 2021 2:22 pm linkquote
Hi, I tried bouncing the bike off a curb a few times today with no luck. I will run down the fuel tank a bit more tomorrow and try some more bouncing.
Sat Nov 20, 2021 2:33 pm

Hooked
Piaggio Bevery 300 ie - 2012
Joined: 08 Aug 2021
Posts: 232
Location: Belgium
 
Hooked
Piaggio Bevery 300 ie - 2012
Joined: 08 Aug 2021
Posts: 232
Location: Belgium
Sat Nov 20, 2021 2:33 pm linkquote
35Chief wrote:
Hi, I tried bouncing the bike off a curb a few times today with no luck. I will run down the fuel tank a bit more tomorrow and try some more bouncing.
Wish you good luck.
Sun Nov 21, 2021 11:36 am

Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
 
Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
Sun Nov 21, 2021 11:36 am linkquote
Hi, Bounced some more today, no change. Fuel gauge light still blinks and fuel needle reads empty even though there is plenty of gas in the tank. More thoughts are welcome.
Sun Nov 21, 2021 1:07 pm

Ossessionato
Black Beater SH150i(31,000)Red Devil SH150i (2000)
Joined: 27 Dec 2013
Posts: 2813
Location: Orange Park Florida
 
Ossessionato
Black Beater SH150i(31,000)Red Devil SH150i (2000)
Joined: 27 Dec 2013
Posts: 2813
Location: Orange Park Florida
Sun Nov 21, 2021 1:07 pm linkquote
Sorry I won't do the research for you. Go to the online service manual. Look up how to check the fuel sender. It will probably require a OHM meter. A winking light points me to an electrical problem, not a stuck float. That is if I understand your post, that the fuel light is not on continuously but blinking.
Sun Nov 21, 2021 1:24 pm

Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
 
Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
Sun Nov 21, 2021 1:24 pm linkquote
Hi, Yes, the yellow fuel light just blinks . I think I may just monitor gas consumption using the trip meter and get some tape and cover the blinking light and be done with it. I am used to working on motorcycles where things are much more open and accessible. I wish they had designed the removal of the body parts a lot more user friendly on the BV 350.
Sun Nov 21, 2021 3:00 pm

Ossessionato
Black Beater SH150i(31,000)Red Devil SH150i (2000)
Joined: 27 Dec 2013
Posts: 2813
Location: Orange Park Florida
 
Ossessionato
Black Beater SH150i(31,000)Red Devil SH150i (2000)
Joined: 27 Dec 2013
Posts: 2813
Location: Orange Park Florida
Sun Nov 21, 2021 3:00 pm linkquote
The body parts on the BV are soooo much easier than the body parts on my Honda SH's. The body parts on an Xmax are a nightmare.
I always remove the footrest panels first. It makes removing the other panels easier, even if you don't have to remove the footrest panel.
The only panels that suck on the BV are the headset.
Take your time, put the screws in a bag and wire tie them to the panel and you won't lose the screws.
The only thing to fear about the panels is fear itself.
Mon Nov 22, 2021 10:54 am

Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
 
Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
Mon Nov 22, 2021 10:54 am linkquote
Hi, Bw. I wish you lived a bit closer.
Mon Nov 22, 2021 11:17 am

Hooked
Piaggio Bevery 300 ie - 2012
Joined: 08 Aug 2021
Posts: 232
Location: Belgium
 
Hooked
Piaggio Bevery 300 ie - 2012
Joined: 08 Aug 2021
Posts: 232
Location: Belgium
Mon Nov 22, 2021 11:17 am linkquote
35Chief wrote:
Hi, Yes, the yellow fuel light just blinks . I think I may just monitor gas consumption using the trip meter and get some tape and cover the blinking light and be done with it. I am used to working on motorcycles where things are much more open and accessible. I wish they had designed the removal of the body parts a lot more user friendly on the BV 350.
It blinks? You did not mention that before, or I did overlook it.
When fuel is low the fuel light lights up and stays on, it does not blink. At least not in my BV 300.

I am afraid if you want the problem solved you will have to replace the float-sender unit, this thing: https://www.easyparts.be/Benzinetankzender_(Originele-onderdelen)-p33527724
And you will have to dig in the body parts.

Never done that myself but according to breaknwind it should not be too difficult.
Tue Nov 23, 2021 12:12 pm

Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
 
Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
Tue Nov 23, 2021 12:12 pm linkquote
Hi Peter and all, that does seem to be the likely problem - the float sending unit. Thank you for tracing down the part. I will have to think it over on whether I want to tackle the job myself, have a mechanic do it or just leave it alone and like you said in an earlier reply just keep track of fuel consumption using the trip meter.
Tue Nov 23, 2021 12:55 pm

Ossessionato
Black Beater SH150i(31,000)Red Devil SH150i (2000)
Joined: 27 Dec 2013
Posts: 2813
Location: Orange Park Florida
 
Ossessionato
Black Beater SH150i(31,000)Red Devil SH150i (2000)
Joined: 27 Dec 2013
Posts: 2813
Location: Orange Park Florida
Tue Nov 23, 2021 12:55 pm linkquote
Could be something as simple as a sloppy connection in the plug. I made a half assed Utube video B4 Scooter West did.

If you remove the right foot rest panel and the seat. You should be able to remove the right gas tank hump panel to gain access to the fuel tank. That's the silver panel that goes up the side of the glove box.
Replacing the seat is easier if you have someone to put the nuts on while you hold it. The hardest part of the foot rest panel is the rubber mat. After you make sure the plug retainer is in the hole and isn't folded over, you have to tuck each tab into the slot. Start from one end(front or back) and work your way across, one at a time. I think there's 4 of them.
I must have removed the panels of my 2014 8-10 times and my 2015 6-8 times. I painted one bike dark cherry and the other Hi-viz green.
Tue Nov 23, 2021 2:35 pm

Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
 
Member
BV 350
Joined: 21 Nov 2020
Posts: 18
Location: Ct.
Tue Nov 23, 2021 2:35 pm linkquote
Hi, In comparing both videos that were provided in earlier posts regarding removing the body panels would I have to remove the seat. It looks like when I remove the lower side panel on both sides above the rubber foot rest that I would have access to the 4 screws that cover the gas tank fuel cover. In removing that cover would that give me access to the float sending unit ?
Tue Nov 23, 2021 3:21 pm

Ossessionato
Black Beater SH150i(31,000)Red Devil SH150i (2000)
Joined: 27 Dec 2013
Posts: 2813
Location: Orange Park Florida
 
Ossessionato
Black Beater SH150i(31,000)Red Devil SH150i (2000)
Joined: 27 Dec 2013
Posts: 2813
Location: Orange Park Florida
Tue Nov 23, 2021 3:21 pm linkquote
I don't remember that one. I do remember that if you try to force your way into a shortcut, you'll regret it. I only broke one plastic tab in all the times I've done it.
Tue Nov 23, 2021 3:32 pm

Ossessionato
Black Beater SH150i(31,000)Red Devil SH150i (2000)
Joined: 27 Dec 2013
Posts: 2813
Location: Orange Park Florida
 
Ossessionato
Black Beater SH150i(31,000)Red Devil SH150i (2000)
Joined: 27 Dec 2013
Posts: 2813
Location: Orange Park Florida
Tue Nov 23, 2021 3:32 pm linkquote
In my Honda service manual, it has a panel flow chart. Look up a panel and it tells you what panels you have to remove to get to it.
Sorry, I'm not going to look that up for you.
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