Vespa LX Carburetor Jets Cleaned
Post Reply    Forum -> Project Reports 12Next
Author Message
Hooked
1948 Knucklehead Bobber, 1964 Triumph Chop, 2007 Vespa GTS, 1974 Primavera 200cc
Joined: 25 Nov 2008
Posts: 163
Location: Long Beach, CA
Thu May 26, 2011 2:11 pm quote
Heres a really quick way to clean your jets in the carb if you are having trouble. Know that if your scoot has been sitting for awhile ( 4 months or more) you will need fresh gas. Dont be intimidated. Here ya go!

DSC_0906.JPG

DSC_0907.JPG

DSC_0908.JPG

DSC_0909.JPG

DSC_0910.JPG

DSC_0911.JPG

DSC_0912.JPG

DSC_0913.JPG

DSC_0915.JPG

DSC_0914.JPG

DSC_0919.JPG

DSC_0920.JPG

DSC_0923.JPG

DSC_0924.JPG

DSC_0925.JPG

DSC_0926.JPG

DSC_0927.JPG

DSC_0928.JPG

Ossessionato
GT200L Alabaster 2004 "Lady"
Joined: 17 Feb 2011
Posts: 2162
Location: Ishioka, Ibaragi Pref., Japan and Khun Han, Isaan, Thailand
Thu May 26, 2011 9:41 pm quote
Thanks for that, I suppose it is very similar to my GT200 carburettor ?
Veni, Vidi, Posti
2007 Vespa LX 190, 2011 LXV150ie
Joined: 26 Oct 2008
Posts: 8583
Location: Annapolis, MD, USA
Fri May 27, 2011 7:49 am quote
JackR wrote:
Thanks for that, I suppose it is very similar to my GT200 carburettor ?
I'm assuming that's an LX50, as the chassis is the same as my LX150, but the carb and engine are a bit different. The basic procedure would be the same for all the Keihin and Walbro carbs up through the 200. The designs are pretty similar.
Enthusiast
Vespa S 50 2T
Joined: 09 Apr 2011
Posts: 61
Location: West Yorkshire
Fri Jun 03, 2011 10:43 am quote
Hi, i have a S50, and am i right in thinking that the LX & S are basically the same? If so, does this mean i should be able to follow these steps?
Veni, Vidi, Posti
2007 Vespa LX 190, 2011 LXV150ie
Joined: 26 Oct 2008
Posts: 8583
Location: Annapolis, MD, USA
Fri Jun 03, 2011 11:14 am quote
Taky34 wrote:
Hi, i have a S50, and am i right in thinking that the LX & S are basically the same? If so, does this mean i should be able to follow these steps?
Yes.

Be aware that you will spill some gas when you remove the float bowl unless you put a rag under the carb to soak it up.
Enthusiast
Vespa S 50 2T
Joined: 09 Apr 2011
Posts: 61
Location: West Yorkshire
Fri Jun 03, 2011 1:48 pm quote
great thanks! i'll let you know how it goes
Member
2007 GT200
Joined: 24 May 2011
Posts: 30
Location: Newbury Park, California
Mon Jun 13, 2011 12:18 am quote
Jets
When screwing the jets back in, should they just be snug or really tight? Also, do any gaskets need to be replaced? Should battery be disconnected?
Thanks!
Hooked
1948 Knucklehead Bobber, 1964 Triumph Chop, 2007 Vespa GTS, 1974 Primavera 200cc
Joined: 25 Nov 2008
Posts: 163
Location: Long Beach, CA
Mon Jun 13, 2011 12:29 am quote
When you are screwing the jets back in and it stops, just give it a secondary "make sure its tight" check. Dont try to put the gorilla paw on the jet, as it will strip. You dont need to disconect the battery and the float bowl gasket doesnt need to be replaced as long as it is not damaged.
Member
2007 GT200
Joined: 24 May 2011
Posts: 30
Location: Newbury Park, California
Mon Jun 13, 2011 8:09 pm quote
Good info
Thanks! My ET4 sat for a few years before I bought it from its then owner. It runs good but will sometimes idle high at stops. Not sure if this may be a jet issue, but it's good to see documented processes like the one above.
Thanks again!
Enthusiast
2001 Vespa ET4 150
Joined: 23 May 2011
Posts: 99
Location: Italian living in Belgium
Tue Jun 14, 2011 2:49 am quote
Re: Good info
PuttNugly wrote:
Thanks! My ET4 sat for a few years before I bought it from its then owner. It runs good but will sometimes idle high at stops. Not sure if this may be a jet issue, but it's good to see documented processes like the one above.
Thanks again!
I did the same few weeks ago, and before I was looking for exactly something like that in order not to mess up anything
Anyway everything went pretty much Ok and I can tell the procedure for the ET4 is exactly the same.
A note: I found more comfy to disconnect the throttle cable, the harnesses and so on, bring my carb (it was way much filthy than this one) under the light on the table with a white cloth below and patiently dismantle it and cleaning it all: much better for your back!
Moderator
2006 LX150 "Amadora"
Joined: 01 Feb 2006
Posts: 7129

Wed Jun 15, 2011 3:44 pm quote
On the LX150 there is also a very tiny black tube that runs off of the bottom of the carb which will come off as you lift the carb. It can be hard to see if you don't have direct light into the engine area. If you don't reattach this tube, you can expect a small puddle of gas under the carb.
Member
Et4
Joined: 19 Jun 2011
Posts: 6
Location: Cheshire , UK
Mon Jun 20, 2011 4:52 am quote
brilliant post
Brilliant, this is exactly want i have been looking for, great instruction and clear photos.

Will try tonight and if i mess up, will be back saying how rubbish the instructions were!!! haha

No seriously many thanks

Tim
Member
et4 150 Porco Rosso
Joined: 28 Jun 2011
Posts: 17
Location: kck
Wed Jun 29, 2011 10:48 am quote
other end of the hose??
cleaned the jets on my et4, went well. Boy were they dirty. The bowl gasket was stuck to the carb body and I had to ease it off with my finger nail tool. Wound up stretched and wouldn't fit back in the groves on the bowl side. just kept working in and holding and compressing and it finally stayed long enough to index it back to the carb body.

In the process the hose on the bottom of the bowl came off, at the other end, and I can't find out where it goes. There is a nipple some where that needs a hose that I can't see.

No real help in any of the drawings in any manual I have.


Help.
Member
2007 GT200
Joined: 24 May 2011
Posts: 30
Location: Newbury Park, California
Wed Jun 29, 2011 3:21 pm quote
other end of the hose??
Is it an orange hose? If so, it mine runs down the side of my engine case and is not attached to anything.
I'll take a picture and post.
Member
2007 GT200
Joined: 24 May 2011
Posts: 30
Location: Newbury Park, California
Wed Jun 29, 2011 3:41 pm quote
other end of the hose??
There is another Post that addresses that hose, it's a vent/overflow hose, explained in this Post...

What is this hose? (LX150)

Hope this is what you needed.
Member
et4 150 Porco Rosso
Joined: 28 Jun 2011
Posts: 17
Location: kck
Wed Jun 29, 2011 9:41 pm quote
Re: other end of the hose??
PuttNugly wrote:
There is another Post that addresses that hose, it's a vent/overflow hose, explained in this Post...

What is this hose? (LX150)

Hope this is what you needed.
I think so. The end does not look like it has been on a nipple and no clamp mark. fits real nice along side the head and down to ground.

I think this is solved.

Many thanks.
Veni, Vidi, Posti
946
Joined: 18 Jun 2007
Posts: 5792
Location: Acworth, GA
Thu Jun 30, 2011 2:10 pm quote
Re: other end of the hose??
vetus wrote:
PuttNugly wrote:
There is another Post that addresses that hose, it's a vent/overflow hose, explained in this Post...

What is this hose? (LX150)

Hope this is what you needed.
I think so. The end does not look like it has been on a nipple and no clamp mark. fits real nice along side the head and down to ground.

I think this is solved.

Many thanks.
Correct.
Member
2009 Vespa S 150
Joined: 27 Jul 2011
Posts: 10
Location: Memphis, TN
Tue Aug 02, 2011 9:01 am quote
So what happens if you strip the screw heads in step 6?

And how can I fix it?

T_T
Molto Verboso
2007 LX150 Dragon Red & 2009 H-D FLHRC
Joined: 05 Dec 2007
Posts: 1773
Location: Tampa Bay, FL
Mon Aug 08, 2011 6:31 pm quote
Very cool. Thanks for posting with such detailed pictures.
Member
Vespa Touring LX50 4T 4V 2011
Joined: 06 Jun 2011
Posts: 15
Location: The Netherlands De Meern
Wed Aug 10, 2011 9:31 pm quote
plemieux wrote:
So what happens if you strip the screw heads in step 6?

And how can I fix it?

T_T
Use pliers to turn the broken screws out. After that buy new screws and install them.
Scooter Pimp
------Piaggio Zip 100------
Joined: 22 Sep 2010
Posts: 3073
Location: England
Thu Aug 25, 2011 11:40 am quote
.

Hi Longbeach


I've only just seen this thread on carb jet cleaning - you've made an excellent job of explaining it.

Have you thought about turning this into a MV Wiki article - I think it would be very useful for many a MVer to refer to.

Well done you !!!


Fabio

.
Hooked
1948 Knucklehead Bobber, 1964 Triumph Chop, 2007 Vespa GTS, 1974 Primavera 200cc
Joined: 25 Nov 2008
Posts: 163
Location: Long Beach, CA
Mon Aug 29, 2011 10:48 am quote
Thanks Fabio! How do I go about doing that? I actually had alot fun doing this. I have been thinking about more. Anyone have anything they need a pictorial done on?
Scooter Pimp
------Piaggio Zip 100------
Joined: 22 Sep 2010
Posts: 3073
Location: England
Mon Aug 29, 2011 11:11 am quote
.

Hi LB...

Have a look at this thread (towards the bottom of the page).... How To Use This Wiki


Fabio

.
Lurker
Vespa LX50
Joined: 27 Mar 2012
Posts: 1
Location: North Andover, Mass, USA
Tue Mar 27, 2012 4:06 am quote
Carb Cleaning
Excellent description. Gives me the confidence to give this a shot. I'll let you know how it goes.

Graham

The results were great. I had a little difficulty clearing the jet. I ended up using a thin wire from a jewelry kit. Once it was back together the scooter works great.

Graham
Lurker
Lx50
Joined: 01 Apr 2012
Posts: 1
Location: NY
Fri Apr 06, 2012 3:23 pm quote
This was awesome. My 2006 LX50 would start but would die if I revved the engine above idling. I followed your instructions and I'm back to 100%. Thanks!!!!!
Enthusiast
LX 150
Joined: 03 Mar 2012
Posts: 78
Location: Gatesville, Texas
Sat Apr 07, 2012 4:21 am quote
Great job on the post! Thanks!
Lurker
Joined: 13 May 2012
Posts: 3

Sun May 13, 2012 11:13 am quote
Help Please
This instruction was great thanks! So i cleared the hole in the jet (can see through it now!) and reassembled everything. Now, I can't get the engine to start. It is like the battery is dead but it is not. I have it fully charge, light works, horn, etc.

What in the word could be going on?

Before I removed the carb and cleaned the jet, I had removed the Evap hose (I think that's what it is) and so this hose is not connected. Surely this is not the problem.

Suggestions appreciated!
Lurker
Joined: 13 May 2012
Posts: 3

Sun May 13, 2012 11:18 am quote
Piaggo Code
Actually, I just looked at my speedometer and the Piaggo Code light is flashing red. Wondering if I am being punished for fixing the jet??? Thoughts anyone? Many thanks
Lurker
Joined: 13 May 2012
Posts: 3

Sun May 13, 2012 1:05 pm quote
Ok, All is fine
Sorry, the red button was switched off so dummy me did not realize it. All is well. the Jet clean worked!! Thanks again
Molto Verboso
Joined: 05 Apr 2010
Posts: 1917

Mon May 14, 2012 8:12 am quote
Good tutorial
Enthusiast
2008 LX 50
Joined: 06 Jul 2011
Posts: 76
Location: Arlington, VA
Thu Oct 25, 2012 6:16 am quote
Great tutorial. I was able to clean my jets last night in about 20 minutes.

However, now I come to a stall when idling. Did I miss a jet in the Carb? (I cleaned the slow jet and the larger one)

LX 50 hear.

I'm thinking I need to adjust the idle screw like this picture?

GT 200: Adjusting the Idle

Or is there an idle jet in the carb that I missed? (I noticed another jet in the carb that was off to the side...)

Edit: I think I've found the answer. I'll tinker with the idle screw later. Thanks
Lurker
LX 150
Joined: 19 Nov 2012
Posts: 1
Location: Palmyra, Va
Mon Nov 19, 2012 12:27 pm quote
Awesome tutorial! My wife has a LX 150 which had been sitting in the garage for at least 18 months. I got it to start but it would stall repeatedly. After a couple of rounds with Sea Foam, it would still not run. I came across this tutorial and followed it exactly. The hardest part was getting the jet clean which took repeated cycles of carb cleaner and canned air. Finally, it came clean, reinstalled everything and the LX 150 is running great! Thanks for the great info. I was done in about 40 minutes.
BTW, the 2006 LX 150 has 4 screws holding the float bowl, otherwise, instructions matched up perfectly! Thanks.
Member
vespa gt 200
Joined: 26 May 2012
Posts: 11
Location: orange n.s.w australia
Thu Dec 20, 2012 7:04 pm quote
great instructions, well documented and clear pics...and finger tattoos cool too
Enthusiast
2006 LX 150
Joined: 04 Nov 2006
Posts: 51
Location: Margate, NJ
Sat Dec 29, 2012 12:42 pm quote
Great Stuff Thank you.

Here's my challenge. Sandy decided to give my LX150 a bath. Drained and changed all the oils, changed all the filters. New plug. Draind the gas, new gas. ANd yes, I cleaned out the carb and ALL the jets.

It turns over but does not start. ALL the electronics seem to work...any suggestions? Did I miss something simple?? Should I do something over?

Please help, I don't want to trash the 2006 LX150 with less than 2K miles.

Regards,

Ray

PS: Happy New Year
Member
LX150
Joined: 08 May 2012
Posts: 42
Location: Mass
Sat Dec 29, 2012 2:53 pm quote
If it was just rain that got the scoot thereís hope, if it was bathed in saltwater you could have some significant problems.

First thing to find out is if itís an electrical or fuel related issue. Have you checked to see if you have spark (pull the plug and hold against the engine while trying to start it)?
Lurker
LX-150
Joined: 18 May 2013
Posts: 1
Location: Edmonton, Alberta Canada
Sat May 18, 2013 7:45 pm quote
Thank you!
This was excellent.. Performed this on my 2007 LX -150 and saved myself almost $300.00 - which is what i paid to have a shop do the same thing to my wife's about 2 years ago.
My scooter was sputtering and stalling after being stored for the winter despite fuel stabilizer, and now she purrs like a kitten!

Thanks again!!

Duff
Member
Vespa LX50
Joined: 21 Apr 2013
Posts: 19
Location: Montreal
Thu May 23, 2013 3:19 am quote
Hey LongBeach...

I just wanted to say THANK YOU!!!, this post has helped me sooooooooo many times.

Peace
Enzo
Member
1999 px125
Joined: 11 Nov 2013
Posts: 6
Location: Herefordshire
Mon Nov 11, 2013 12:12 am quote
I'm stuck, I can't get the rear boot off the carb. I have undone the clips but it just won't shift, any suggestions please.
Thanks.
Member
2007 LX 150 (RIP); 2007 GTS 250
Joined: 12 Jul 2011
Posts: 29
Location: Charleston, SC
Mon Jun 23, 2014 10:58 am quote
I know what I'm doing tonight!
Hopefully I can fix the wife's 2007 LX 50 today & be the hero. Darn thing won't start, having been totally reliable up to the point of leaving me stranded on the roadside last week. I've been doing a whole lot of Vespa wrenching lately (for me.) Just tackled full service (belt, rollers, oil/filter, air filter, spark plug) for the first time on my GTS 250. A lot of work, but I'm glad I tackled it.

I have the LX cracked open at home right now in an attempt to pin down the problem that caused me to get stranded in the heat last week and what's keeping it from starting. I've cleaned the bendix as well as I could--I think a bodybuilder torqued the variator nut down last time because I couldn't get it off with my 18v impact wrench or with a torque wrench & a towel (I don't have the variator tool for the LX50, so I used the rolled-up towel trick...which totally worked on the GTS, but did nothing but shred the towel on the LX's razor-toothed gears. I had been hoping that it was just the bendix and was not to be thwarted, I covered the belt with the towel & sprayed the gear assembly with WD-40 and then wiped it down the best I could. I then placed the cover back over the transmission housing & tested the ignition. The bendix engaged & turned over the engine, which was an improvement. Repeated attempts yielded no ignition. I removed the spark plug lead and reconnected it (after was unable to get in to remove the spark plug. I picked up a double-drive extenable ratchet set on clearance at Lowe's...looks like it make getting at the spark plug a bit more manageable.

I even removed the top casing of the carb and cleaned it out as best as I could...but I didn't know how to proceed further with it, so I put it back together. I went to bed, got 1 hour of almost sleep and went to work. I'm about to get off, go home, take a nap and then we're gonna clean that carb out. Here's hoping this takes care of the non-starting problem! Time to go...exhausted. Glad work is only 2.5 miles from home.
Enthusiast
LX50 2T, PK80/135
Joined: 16 Mar 2012
Posts: 63
Location: London
Sun Jun 29, 2014 12:33 pm quote
Hi,

Not sure if anyone has any advice but have tried to take off my carb to clean and failed at the first steps.

With some difficulty I managed to remove the rear boot. However, I can't get the carb of the other boot (front facing one). And now I can't get the rear boot back on!

Help!

Thanks!
Missouri Loves Company Rally   Vespa Wasp Pin Badges   Scooter Parts Company
Post Reply    Forum -> Project Reports 12Next
[ Time: 0.3476s ][ Queries: 25 (0.0419s) ][ Debug on ]