Modern Vespa

I have a 2009 LXV150 that keeps quitting like it is not getting gas,where is the fuel filter hidden as that is one of the first things I want to check

In the tank, part of the fuel pickup. Check your vacuum line to the fuel tap to make sure it isn't cracked.

I will check that out

You need to change your fuel and vacuum lines and the fuel filter. Make sure the lines are the same length as the ones you take out.

Thanks for posting Judy, nice to know you aren't affected by the earthquakes and eruption 🌋.

PP thanks. Hopefully the fumes will steer clear of Oahu. The sulfuric acid given off isn't good for anything. No Kona winds just trades for the next few days.

were is and how do you get at the fuel tap ?

I'll bet my LX that your lines are bad not the fuel tap. My lines only last 4yrs. Stranded me once and now i make sure i replace them. The reason i said make sure you cut it the same as the one you take out is this last time i had a 12in bit of Maolossi tubing. My mechanic didn't measure it and it stranded me. The reason was it was a tad below the carb. You can get it precut or a long piece. I didn't even know i had a fuel filter. The shop got a generic one from NAPA. The lines need to be done anyway because it's not a matter of if they fail it's when.

well I changed the lines but the scooter still does it.
I also noticed that when first starting it it will run good when cold but after a minute or so once scooter is warmed up is when it quits and it quits like it was shut off
sometimes it will start right back up sometimes
you have to wait a minute or so before it will start
I can run it for quite a while on center stand with no problem but soon as try riding it it starts cutting out

What year is it? Glad you swapped out thee lines. They would of caused you problems. I have a '07 LX 150 and when my bike did the same thing( cut off when it warmed up) it turned out to be my immbolizer. You could try swapping out the fuel tap to see if that helps but IMHO that wouldn't cause the bike to quit when it warms up. I chased my tail when mine did that (immobolizer )and i had one in my LT 150 that we took and put in the LX. This was after we swapped the fuel tap, tap,relay and a few other things. My LX was 7yrs old when we did it. Scooterpartsco.com has them for about $170. Good luck

Actually you don't have a fuel tap. Instead your year has an electric fuel pump. So let's start over:

1. Pull the fuel line off the carb.
2. Turn on the ignition and verify fuel is pumped out the fuel hose. You should also hear the pump. This should stop in 10 seconds with the engine off.

You should see fuel gush out of the fuel line. If not, then you need to troubleshoot the pump and upstream electric. PM me if you want a link to my 2008 - 2009 LX150 wiring diagram and the fuel pump test procedure. It's too big to upload here.

Bill

I will do that tomorrow as I did change the vacuum line and that did help a little and I planed on changing the fuel line to as it seems to be a bit mushy.
only thing is I hate the crimped on hose clamps the factory uses as they are a pain in the ass to get off

Yes, those hose crimps are a pain. I use a small screw driver, twist the hose, and find where the crimp overlaps. Then peel the joint apart.
The OEM fuel hose to the carb is 3/16. I used a spring type hose clamp from a lawn mower shop to put it back together.

Bill

good to know what size the hose is and yes that is what I used when I replaced the vacuum line,spring clamps are much easier to work with

I'm confused. Your 4th reply (including the first one) says you changed the lines and now your saying that you only did the vacuum line. When you change out the fuel line and it still won't start when it's warm, check your CDI. That's a symptom of a bad CDI. '09 is the year that they made the LX FI. The first half of '09 were carbed and the second half were FI. Jus to confuse people more they came out in 10" with a pink scooter that was carbed.

Hi Judy,
Let's let him check his fuel pump. His LX is different than yours.

Bill

Will do. Confusing or maybe it's me.

I pulled the fuel line off the carb and checked and gas just barely dripped out,I put a new fuel on and now gas comes out like a garden hose.
with my LXV there is only gas flow when engine is cranked or running with key on but not running there is no gas flow
so it seems no fuel pump just gravity feed to the carb
and yes mine is a carb and not FI
scooter is running much better now

There is no "gravity feed". When the pump is off, the red check valve assures no feed for crash safety reasons. There should be a several seconds of fuel flow with key on / engine off. I attached the troubleshooting page from the 2008/ 2009 LX workshop manual. If you start having problems again with stalling, you can start by following the sheet. My problem was intermittent pumping and burned points in the fuel pump.

Bill

As I recall, there were some LX's built with carbs and fuel pumps, prior to the EFI bikes.

'09 was the year they switched over. It was the latter half. First half was still carbed. Then to totally confuse people, they did a run of pink carbed LX 150's in 2010.

yes mine is carbed and there is only fuel flow when engine is cranked or running,with key on only and engine not running there is no fuel flow

here is what it looks like were the fuel and vacuum lines connect to the gas tank on my LXV 150 [/img] and the engine bay

Ok, so that's not an electric fuel pump. Maybe you don't have a 2009 year?

Bill

title says 2009 but who knows when it was actually built,
it could be a early 2009 or ??

C like i said '09 was a year that they had both. First half was a carb and the second half was FI. There was a guy here who had a '09 carbed LX. If yours is FI then it was from the second half of "09.OLD you have a '09. The lines won't necessarily look bad but it's a good idea to swap them out before they strand you.

yes I did swap them out and now scooter runs much better
also here is another question,in the owners book it says to use 92 or higher octane gas but it is getting very hard to find 92 octane it is getting were about the only thing you can find is 89 octane and most of that has ethanol added witch I know you should not use so what do you do if the proper gas is no longer available ?

Awesome. I use ethanol free gas and it's only 89 octane. I have over 48,000 miles on my LX and haven't run into any problems. Before that i didn't always use 92. So i really don't think it makes much of a difference. When you find some (higher octane) put it in but i wouldn't worry about it.

Ok,so not to picky,at least I can still get 91 octane ethanol free gas but what if you are traveling and you need gas but the only thing you can get is 79 octane with ethanol gas ?

I'd use the 91. 79? Did you mean 89?

no I did mean 79 as there are places that only have one gas pump and that is all they have in there one pump.
I do use the 91 but if you were someplace were the 79 was the only thing ?

That can't be right. No vehicle today can run on 79 octane. 87 is the bottom. Look up 79 octane on the web and you will not get a hit.

https://search.aol.com/aol/image;_ylt=A2KIbNDI0PNaLEcAdxtpCWVH;_ylu=X3oDMTEyc2VxaWNzBGNvbG8DYmYxBHBvcwMxBHZ0aWQDQjU4MzNfMQRzZWMDc2M-?q=lowest+octane+gasoline+in+the+US&v_t=nscp-isp

Ok,it is possible too that I might have misread the sticker on an old gas pump,just seen it did not have to get gas at the time

It's probably 89. My bike runs fine on 89 ethanol free.

my 2009 LX 150 was sputtering and dying at idle, came across this thread in my search to resolve it. everything here was super helpful but I thought I'd post my fix in case anyone has the same issue in the future.

in my case the spark plug had sheared inside the cap. and eventually broke off when I removed it. I guess it was getting some spark but obviously not enough.

based the earlier posts, I'm thinking of replacing all my lines before they become a problem.