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@scooterace avatar
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'05 PX 150 (sold) Kaw Z 750, '09 GTS 250ie
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Location: Florida Panhandle
 
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@scooterace avatar
'05 PX 150 (sold) Kaw Z 750, '09 GTS 250ie
Joined: UTC
Posts: 36
Location: Florida Panhandle
UTC quote
Greetings from the Florida Panhandle. Let me introduce myself as scooterace ? and thank you for allowing me to join the forum. After owning many bikes. I decided to dip into the Vespa experience ( after about 20 years since my last one). I recently acquired a 2005 px150 with only 500 miles on it; showroom condition. Starts and runs strong with the exception of that pesky problem of failing to return to idle ( high revving ) after a few minutes at WOT. The previous owner had installed a Sito pipe which I removed and replaced the original one. It also had a 95 main jet. Seems like should have been a larger one. I have tightened the carb base bolts and ordered new jets (100 size, maybe should go larger ). I welcome any suggestions and will let you know my outcome. Thanks again for the info on this great forum.
UTC

Hooked
Vespa T5 - GTS250 - HEAT
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Location: Britain
 
Hooked
Vespa T5 - GTS250 - HEAT
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Location: Britain
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Scoot
Welcome! Have you checked your carb slide isn't sticking or cable problem?
@astromags avatar
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Veni, Vidi, Posti
'80 P200E, '76 Primavera 125 ET3. '59 Vespa 150
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Veni, Vidi, Posti
@astromags avatar
'80 P200E, '76 Primavera 125 ET3. '59 Vespa 150
Joined: UTC
Posts: 6897
Location: GT, Texas
UTC quote
What size carburetor is in that scooter? SI 20/20?
If so, a 95 is definitely too small for a Sito+
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@scooterace avatar
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'05 PX 150 (sold) Kaw Z 750, '09 GTS 250ie
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Posts: 36
Location: Florida Panhandle
 
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@scooterace avatar
'05 PX 150 (sold) Kaw Z 750, '09 GTS 250ie
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Posts: 36
Location: Florida Panhandle
UTC quote
Thanx guys for quick response. For the record it is a si 20/20. Wil check the slide shortly after try larger jets when they arrive.
@subetherbass avatar
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Ossessionato
1997 Italjet Formula 125, 2 matching N.Z. '69 VBC Super, 177cc Racer, VespaCross Bodge, Puch SRA150, Piaggio Zip 100! & others
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Location: Australa, Mate
 
Ossessionato
@subetherbass avatar
1997 Italjet Formula 125, 2 matching N.Z. '69 VBC Super, 177cc Racer, VespaCross Bodge, Puch SRA150, Piaggio Zip 100! & others
Joined: UTC
Posts: 4720
Location: Australa, Mate
UTC quote
You need a bigger jet before it seizes
@mbnz77 avatar
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PX 225, SS 180, 90SS
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Location: New Zealand
 
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@mbnz77 avatar
PX 225, SS 180, 90SS
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Posts: 173
Location: New Zealand
UTC quote
Welcome Scooterace

As mentioned above it sounds like your PX is running lean... I would get that 100 main jet installed and see if that improves things. I think 95 is small even on a bog standard 150.
@subetherbass avatar
UTC

Ossessionato
1997 Italjet Formula 125, 2 matching N.Z. '69 VBC Super, 177cc Racer, VespaCross Bodge, Puch SRA150, Piaggio Zip 100! & others
Joined: UTC
Posts: 4720
Location: Australa, Mate
 
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@subetherbass avatar
1997 Italjet Formula 125, 2 matching N.Z. '69 VBC Super, 177cc Racer, VespaCross Bodge, Puch SRA150, Piaggio Zip 100! & others
Joined: UTC
Posts: 4720
Location: Australa, Mate
UTC quote
mbnz77 wrote:
Welcome Scooterace

As mentioned above it sounds like your PX is running lean... I would get that 100 main jet installed and see if that improves things. I think 95 is small even on a bog standard 150.
Is that you Matt?
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'05 PX 150 (sold) Kaw Z 750, '09 GTS 250ie
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Posts: 36
Location: Florida Panhandle
 
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@scooterace avatar
'05 PX 150 (sold) Kaw Z 750, '09 GTS 250ie
Joined: UTC
Posts: 36
Location: Florida Panhandle
UTC quote
Can't wait for new jets to arrive. Will definitely update . Happy 4th to all.
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Enthusiast
lml star 125 2t
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Location: Leeds U.K
 
Enthusiast
lml star 125 2t
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UTC quote
Ey up lad, new here myself but have to say the lads on here are very helpful....welcome
@mbnz77 avatar
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Hooked
PX 225, SS 180, 90SS
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Posts: 173
Location: New Zealand
 
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@mbnz77 avatar
PX 225, SS 180, 90SS
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Location: New Zealand
UTC quote
SubEtherBASS wrote:
mbnz77 wrote:
Welcome Scooterace

As mentioned above it sounds like your PX is running lean... I would get that 100 main jet installed and see if that improves things. I think 95 is small even on a bog standard 150.
Is that you Matt?
No, Michael here.
OP
@scooterace avatar
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Member
'05 PX 150 (sold) Kaw Z 750, '09 GTS 250ie
Joined: UTC
Posts: 36
Location: Florida Panhandle
 
Member
@scooterace avatar
'05 PX 150 (sold) Kaw Z 750, '09 GTS 250ie
Joined: UTC
Posts: 36
Location: Florida Panhandle
UTC quote
OK. Ive got to ask. How do you guys get those sweet
pics by your name ??? Logos. etc. ??
@astromags avatar
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Veni, Vidi, Posti
'80 P200E, '76 Primavera 125 ET3. '59 Vespa 150
Joined: UTC
Posts: 6897
Location: GT, Texas
 
Veni, Vidi, Posti
@astromags avatar
'80 P200E, '76 Primavera 125 ET3. '59 Vespa 150
Joined: UTC
Posts: 6897
Location: GT, Texas
UTC quote
scooterace wrote:
OK. Ive got to ask. How do you guys get those sweet
pics by your name ??? Logos. etc. ??
Go to "profile" at the top. Scroll down to the bottom of the "profile" page and you'll see the "avatar control panel". Upload your image there.
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@scooterace avatar
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Member
'05 PX 150 (sold) Kaw Z 750, '09 GTS 250ie
Joined: UTC
Posts: 36
Location: Florida Panhandle
 
Member
@scooterace avatar
'05 PX 150 (sold) Kaw Z 750, '09 GTS 250ie
Joined: UTC
Posts: 36
Location: Florida Panhandle
UTC quote
I took the leap and pulled the carb off of my '05 PX-150 after my experiences with the fail to return to idle and starting problems. I replaced the gaskets and installed new jets; bumping the main jet to #100. Also replaced the float and needle jet. Once everything was back in place, it started promptly and revved quickly; then stalled and wouldn't start. I noticed shortly thereafter that gas was running through the carb onto the floor. I pulled the top off the float chamber which of course was full of gas and replaced the new, ill-fitting black washer (gasket) with the old one and let the gas drain with the pet cock off; after a while it then started promptly. After a couple of short rides it seems to start and perform well, as long as I shut off the petcock after every run; haven't tried WOT yet. I believe the #100 will be better ; its got me thinking of the #107 or #110. I believe, for whatever the reason, that the new float and needle jet are prone to sticking.
Today I did a couple of runs close to WOT and again everything seems to work fine. Apparently the key is : when the key turns off also the petcock. Thanks guys for help and archival info from the forum.
@sconner60123 avatar
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Hooked
1962 VBB, 2005 PX150, Yamaha Vino 125's (3)
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Posts: 196
Location: Phoenix AZ
 
Hooked
@sconner60123 avatar
1962 VBB, 2005 PX150, Yamaha Vino 125's (3)
Joined: UTC
Posts: 196
Location: Phoenix AZ
UTC quote
Welcome Scooterace! I bought a 2005 PX150 myself...just a couple weeks ago.

The PX150 is my favorite bike. I owned one a few years back and never forgot the PX "Magic".

Hope you enjoy it. This is an amazing forum with VERY generous members...always willing to lend a hand.
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@scooterace avatar
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Member
'05 PX 150 (sold) Kaw Z 750, '09 GTS 250ie
Joined: UTC
Posts: 36
Location: Florida Panhandle
 
Member
@scooterace avatar
'05 PX 150 (sold) Kaw Z 750, '09 GTS 250ie
Joined: UTC
Posts: 36
Location: Florida Panhandle
UTC quote
Thx for the reply sconner. Just curious...... have you experienced any sticking float symptoms ? How many miles on your scoot ??
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