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@wolfgang avatar
UTC

Member
Vespa LX 125 (2005)
Joined: UTC
Posts: 11
Location: UK
 
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@wolfgang avatar
Vespa LX 125 (2005)
Joined: UTC
Posts: 11
Location: UK
UTC quote
On a recent trip my Vespa LX 125 (2005) started coughing and spluttering. When stopped it was very difficult to start again and would barely run only on full throttle. I put this down to having filled with old fuel. I also had issues with a petrol strimmer that used the same. The strimmer is working fine again having drained the fuel, cleaned the carb and used new fuel.

On the Vespa I have also drained the fuel, changed the fuel tap and filter and refilled with new fuel but still runs rough. What else can I do? Clean the carb, replace parts in the carb? Is there a carb repair kit available? Grateful for any suggestions.
@abner_bjorn avatar
UTC

Molto Verboso
2007 GT200, 2008 Yamaha C3, 2009 BV250
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Posts: 1148
Location: Denver
 
Molto Verboso
@abner_bjorn avatar
2007 GT200, 2008 Yamaha C3, 2009 BV250
Joined: UTC
Posts: 1148
Location: Denver
UTC quote
Your scooter is 19 years old. Check for air leaks. Replace all the fuel and vacuum lines if they are original. Be sure you don't have a crack in the intake manifold. Do this and see how it runs before you yank the carb.
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@wolfgang avatar
UTC

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Vespa LX 125 (2005)
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Posts: 11
Location: UK
 
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@wolfgang avatar
Vespa LX 125 (2005)
Joined: UTC
Posts: 11
Location: UK
UTC quote
Thanks.OK will do. Just seems strange that other engines using same fuel had issues. Is there a problem with dismantling carb?
@znomit avatar
UTC

Veni, Vidi, Posti
LX190 Friday afternoon special, [s]Primavera[/s], S50, too many pushbikes
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Posts: 10356
Location: Hermit Kingdom
 
Veni, Vidi, Posti
@znomit avatar
LX190 Friday afternoon special, [s]Primavera[/s], S50, too many pushbikes
Joined: UTC
Posts: 10356
Location: Hermit Kingdom
UTC quote
Wolfgang wrote:
Is there a problem with dismantling carb?
No.
It's the reassembly that causes problems.
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@wolfgang avatar
UTC

Member
Vespa LX 125 (2005)
Joined: UTC
Posts: 11
Location: UK
 
Member
@wolfgang avatar
Vespa LX 125 (2005)
Joined: UTC
Posts: 11
Location: UK
UTC quote
OK thanks - can you point me to any guides, videos that would help in case I have to do it. Might try adjusting mixture before that. Will check everything else first.
@tripo avatar
UTC

Addicted
2016 GTS 300 Settantesimo Grigio Pulsar
Joined: UTC
Posts: 537
Location: San Antonio, Texas
 
Addicted
@tripo avatar
2016 GTS 300 Settantesimo Grigio Pulsar
Joined: UTC
Posts: 537
Location: San Antonio, Texas
UTC quote
znomit wrote:
No.
It's the reassembly that causes problems.
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