Vespa ET2 Problem
Post Reply    Forum -> General Discussion
Author Message
Member
ET2
Joined: 12 May 2019
Posts: 10
Location: U.S.A New Jersey
Sun May 12, 2019 8:21 am quote
I have a 2001 Vespa ET2. It starts fine and I am able to ride it for about one or two miles before it acts like it is running out of gas then it stalls. I am able to restart it after it sits for about two minutes then the process repeats itself by riding for another two miles before it acts like it is running out of gas and stalls.
I took the carburetor apart, cleaned it and installed a new air filter and it did not fix the problem. I was thinking the fuel tap might not be working correctly. Thank you for your help.
Ossessionato
Joined: 22 Oct 2011
Posts: 3847
Location: Tega Cay, SC
Sun May 12, 2019 11:02 am quote
Did you change out your fuel and vacuum lines?
Veni, Vidi, Posti
63 GS160 / GT60 (X2)/ ET4 (X2)/ ET2/ 78 P200/ 67 Sprint/ 09 GTS/ 03 Ruckus/ 13 946/ 16 Prima 70/ 15 Sprint
Joined: 07 Oct 2006
Posts: 6313
Location: Sherman Oaks
Sun May 12, 2019 12:11 pm quote
Tierney wrote:
Did you change out your fuel and vacuum lines?
This

Carb overhaul must be perfect
Fuel lines
Vacuum lines
Fuel tap replace
Intake boot check for cracks
Fresh gas

Have fun!

SDG
Hooked
GTS 250ie Super, Italjet Velocifero, Scarabeo 150, S50,ET4
Joined: 22 Nov 2016
Posts: 373
Location: Winston-Salem, NC
Sun May 12, 2019 8:55 pm quote
If you open the gas cap immediately does it start? Could be tank venting issue as well.
Member
ET2
Joined: 12 May 2019
Posts: 10
Location: U.S.A New Jersey
Thu May 23, 2019 8:56 am quote
Tierney wrote:
Did you change out your fuel and vacuum lines?
I did not change out the fuel and vacuum lines. They looked good to me but I will change them out. Thank you.
Member
ET2
Joined: 12 May 2019
Posts: 10
Location: U.S.A New Jersey
Thu May 23, 2019 9:03 am quote
SDG wrote:
Tierney wrote:
Did you change out your fuel and vacuum lines?
This

Carb overhaul must be perfect
Fuel lines
Vacuum lines
Fuel tap replace
Intake boot check for cracks
Fresh gas

Have fun!

SDG
Any suggestions on a carb overhaul? I just took the carb apart removed the jets and cleaned everything with carb cleaner.
I am the owner of the scooter since 2001 and I change the fuel tap once because it was staying open. I will install a new one to see if that fixes the problem. Boot looked good but will check again.
Member
ET2
Joined: 12 May 2019
Posts: 10
Location: U.S.A New Jersey
Thu May 23, 2019 9:10 am quote
Pinkscooter wrote:
If you open the gas cap immediately does it start? Could be tank venting issue as well.
When the scooter stalls I will open the gas cap immediately and see if it starts. In my shop manual under trouble shoot for a problem like this it says there could be a problem with the two way value. I don't know what the two way value is. Thank you.
Hooked
2003 Vespa ET2
Joined: 05 Apr 2019
Posts: 115
Location: Cambridge, MA
Thu May 23, 2019 9:18 am quote
1 - carb cleaning..take the jets out and be sure if you hold them up to the light that you can see thru them
2 - airbox connection - be sure this is on there good...you might have a crack thats letting air in...also take a look at your intake (connects the carb to the motor)...this is rubber..mine cracked at some point
3 - spark plug....pull it out and take a look..i wonder if its fouling...trying a new plug can help...be sure the connection from the plug wire is solid

also pay special attention to the electric choke on the carb when cleaning/dissembling ...perhaps its sticking

i would take it easy when it comes to replacing parts..you have had it running well for a long time so i bet its a very simple fix
Hooked
GTS 250ie Super, Italjet Velocifero, Scarabeo 150, S50,ET4
Joined: 22 Nov 2016
Posts: 373
Location: Winston-Salem, NC
Thu May 23, 2019 9:59 am quote
It sounds like the carb bowl is slow filling. Either hoses, petcock or sticky float. I wouldn't suspect an air leak the scooter runs fine for 1-2 miles and is good after a the 2 minutes it takes for the bowl to fill. What was the result of opening the fuel cap?
Member
ET2
Joined: 12 May 2019
Posts: 10
Location: U.S.A New Jersey
Sat Jun 15, 2019 11:06 am quote
When I cleaned the carb I pulled the jets out and I could see light thru the holes. I also removed the old gas and put in new gas and spark plug. I also tried opening the gas cap after it stalled to see if it would start. No luck. I did think that maybe the carb float is sticking. There are no carb parts for this model / carb any more. Would have to tried to find a new carb. In my shop manual under trouble shooting for this problem it says "Two way vent valve blocked" and it should be replaced. I don't know what a two way vent value is. I am going to order a new fuel tap and see if that works. Thank you.
Hooked
GTS 250ie Super, Italjet Velocifero, Scarabeo 150, S50,ET4
Joined: 22 Nov 2016
Posts: 373
Location: Winston-Salem, NC
Sat Jun 15, 2019 11:32 am quote
Did you block off the bowl vent by accident? Make sure thatís clear.
Addicted
lx 50
Joined: 09 Oct 2017
Posts: 924
Location: Brighton
Sat Jun 15, 2019 11:33 am quote
Could it be choke related, just with timing of it, 2 mins, warmed up........
Member
ET2
Joined: 12 May 2019
Posts: 10
Location: U.S.A New Jersey
Sat Jun 15, 2019 11:47 am quote
I don't know what the bowl vent is. The choke is always on at first then when it heats up the choke is suppose to shut off and remain off until cold.
Addicted
et 2 50cc
Joined: 15 Aug 2014
Posts: 804
Location: Hungary
Sat Jun 15, 2019 12:59 pm quote
Is it a Dellorto carb?
Member
ET2
Joined: 12 May 2019
Posts: 10
Location: U.S.A New Jersey
Sat Jun 15, 2019 1:12 pm quote
It is a Weber carb.
Addicted
et 2 50cc
Joined: 15 Aug 2014
Posts: 804
Location: Hungary
Sat Jun 15, 2019 1:14 pm quote
In my ET2 there is Dellorto phva carb. There are repair kits for it. I don't know the Weber.
Member
ET2
Joined: 12 May 2019
Posts: 10
Location: U.S.A New Jersey
Sat Jun 15, 2019 4:21 pm quote
The Weber was the stock carb for the 2000 ET2 maybe just in the U.S.A.
The Weber is no longer manufactured and I can not find parts for it. I think I could replace it with a Dellorto card.
Addicted
et 2 50cc
Joined: 15 Aug 2014
Posts: 804
Location: Hungary
Sat Jun 15, 2019 10:53 pm quote
Good idea, but be careful.
2003 ET2 Carb swap: Weber to Dellorto. DOESN'T FIT
Hooked
GTS 250ie Super, Italjet Velocifero, Scarabeo 150, S50,ET4
Joined: 22 Nov 2016
Posts: 373
Location: Winston-Salem, NC
Sun Jun 16, 2019 7:53 am quote
JDC wrote:
I don't know what the bowl vent is. The choke is always on at first then when it heats up the choke is suppose to shut off and remain off until cold.
All carbs have a vent to that when the bowl fills the air has someplace to go. It's why when you remove the carb and tip it a little fuel will pour out. Some carbs have a hose attached to them that vents to the air and some don't. People will sometimes make the mistake of sealing them off thinking they need to be or attach the wrong hose to it. They like anything can get junked up. Pictures of the carb will help I denitrify it.
Member
ET2
Joined: 12 May 2019
Posts: 10
Location: U.S.A New Jersey
Tue Jun 18, 2019 6:54 am quote
I enclosed a photo of the carb from the shop manual and the actual carb. All I could see is a oil line intake, gas line intake, fuel tap vacuum intake and a bowel drain. Maybe if I pull out the carb and turn it on it's side I will see gas coming out from somewhere.

Weber Carb.jpg

Weber Carb Pic .jpg

Hooked
GTS 250ie Super, Italjet Velocifero, Scarabeo 150, S50,ET4
Joined: 22 Nov 2016
Posts: 373
Location: Winston-Salem, NC
Tue Jun 18, 2019 10:17 am quote
I'm not seeing one in that picture. Maybe I'll stop by my storage today and took at my ET 2 carb and find it for you.
Hooked
GTS 250ie Super, Italjet Velocifero, Scarabeo 150, S50,ET4
Joined: 22 Nov 2016
Posts: 373
Location: Winston-Salem, NC
Tue Jun 18, 2019 3:19 pm quote
I stopped by and climbed back to look at it. It's the Dellorto carb. I saw no obvious vent but its pretty dirty. Though this sounds like a fuel problem it could also be electric. A part heats up and then fails, cools and works. These 2 strokes are pretty simple so it has to be a simple gremlin.
Molto Verboso
63 GL 150, 05 Typhoon, 09 Beo 200
Joined: 20 Jan 2007
Posts: 1715
Location: Grand Pothole Rapids, Michigan
Tue Jun 18, 2019 4:52 pm quote
I would bet on the petcock, the alcohol in our fuel tends to eat them up, so replace it, you are going to have to do it sooner or later......
Member
1972 Vespa Rally 180, Piaggio LT 150
Joined: 28 Mar 2012
Posts: 49
Location: Austin, TX
Wed Jun 19, 2019 9:20 am quote
You can check the fuel tap by disconnecting the fuel line from the carb and disconnecting the vacuum line from the engine. Apply suction to the vacuum line and fuel should flow out fo the fuel line. If not, or barely a trickle comes out, the diaphragm in the tap is likely damaged and it will need to be replaced. If the fuel seems to flow freely then look elsewhere for the issue.
Sponsor
Granturismo 218
Joined: 04 Feb 2013
Posts: 5333
Location: South Carolina
Wed Jun 19, 2019 7:54 pm quote
greg531 wrote:
I would bet on the petcock, the alcohol in our fuel tends to eat them up, so replace it, you are going to have to do it sooner or later......
This may come as a surprise to many people, but before there was alcohol in the fuel, they sold a lot of replacement petcocks and carburetors. It's not the alcohol, this stuff just wears out.
If the replacement carburetor for a 2001 ET2 was $500, it would still be a bargain compared to the hours wasted trying to get something that is broken to work. It's not only time you won't get back, it's time you could be riding.
Hooked
GTS 250ie Super, Italjet Velocifero, Scarabeo 150, S50,ET4
Joined: 22 Nov 2016
Posts: 373
Location: Winston-Salem, NC
Thu Jun 20, 2019 6:59 am quote
When I opened the carb on my Italjet Velo it was obvious it was not coming back to life, the corrosion was in every hole and surface. A new carb from Scooterpartsco and it was happily back on the road.
Member
ET2
Joined: 12 May 2019
Posts: 10
Location: U.S.A New Jersey
Wed Aug 07, 2019 4:39 am quote
I have bought a new fuel tap / petcock. I will install it and if that does not correct the problem I will get a new carburetor. I been looking in to that and I found a replacement for my Weber but there might be a throttle cable issue where it is not compatible with the old cable. This would mean removing a lot of body parts to access the cable. Thanks for all your help.
Veni, Vidi, Posti
2008 MP3 500, 2013 BV350
Joined: 13 Oct 2012
Posts: 7085
Location: Ashburn, Va. Home to the Internet
Wed Aug 07, 2019 5:19 am quote
JDC wrote:
When I cleaned the carb I pulled the jets out and I could see light thru the holes. I also removed the old gas and put in new gas and spark plug. I also tried opening the gas cap after it stalled to see if it would start. No luck. I did think that maybe the carb float is sticking. There are no carb parts for this model / carb any more. Would have to tried to find a new carb. In my shop manual under trouble shooting for this problem it says "Two way vent valve blocked" and it should be replaced. I don't know what a two way vent value is. I am going to order a new fuel tap and see if that works. Thank you.
Did you blow the ports out with compressed air? If the port is clogged, jet isn't going to get any fuel.
Scooting the Ozarks is a scooter rally held in Eureka Springs, Arkansas offering riders scenic twisty rides, poker run, and more.   vespa scooterwest scooter west Motorsport Scooters   Yelcome Leather Top Cases and Roll Bags for Piaggio Vespa PX LX LXV GTS GTV
Post Reply    Forum -> General Discussion
[ Time: 0.2992s ][ Queries: 25 (0.0732s) ][ Debug on ]