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Lurker
Vespa Sprint 125cc
Joined: UTC
Posts: 2
Location: Phnom Penh
 
Lurker
Vespa Sprint 125cc
Joined: UTC
Posts: 2
Location: Phnom Penh
UTC quote
Hello there,

I have a Vespa Sprint 125cc. For some reason, I was riding and break on the red light, the oil pressure went blink and disappear right away. It just gave 1 blink when I break. Then I continue to ride, there wasn't any sign.

In this case, Are there wrong or Is it something related with the engine oil?
@jkj-fz6 avatar
UTC

Ossessionato
BV400, Primavera 150, Yamaha Zuma 125
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Location: Twin Cities, Minnesota
 
Ossessionato
@jkj-fz6 avatar
BV400, Primavera 150, Yamaha Zuma 125
Joined: UTC
Posts: 4279
Location: Twin Cities, Minnesota
UTC quote
Have you checked the oil level?
@mopedlar avatar
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Addicted
2001 GTS Super (white), 2021 GTS Super (yellow), 1976 Bianchi Snark moped, 1980 General 5 Star moped
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Posts: 754
Location: Powhatan, Virginia
 
Addicted
@mopedlar avatar
2001 GTS Super (white), 2021 GTS Super (yellow), 1976 Bianchi Snark moped, 1980 General 5 Star moped
Joined: UTC
Posts: 754
Location: Powhatan, Virginia
UTC quote
Pull the dipstick and check your oil level!
UTC

Enthusiast
Vespas GTS 300 2017
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Posts: 57
Location: Bretagne en France
 
Enthusiast
Vespas GTS 300 2017
Joined: UTC
Posts: 57
Location: Bretagne en France
UTC quote
I trust the oil gauge more than a light
@jimc avatar
UTC

Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
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Location: Pleasant Hill, CA
 
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@jimc avatar
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: UTC
Posts: 43890
Location: Pleasant Hill, CA
UTC quote
The light is for low oil pressure (not for oil level!) which can happen when you brake and the oil pump misses a gulp of oil because the level is low.

So this is most probably, as above, low oil level. Luckily it's giving you a chance to top up before detonation.
OP
UTC

Lurker
Vespa Sprint 125cc
Joined: UTC
Posts: 2
Location: Phnom Penh
 
Lurker
Vespa Sprint 125cc
Joined: UTC
Posts: 2
Location: Phnom Penh
UTC quote
To Jimc, Viso, Mopedlar,JKJ-FZ6,

I have checked the oil dipstick, the oil was normal. It really not often happen, the light just show up for 3-4 second than it will disappear.
@touring300 avatar
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GTS 300ie Touring 2013 - Signora D'argento
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Location: Lancaster, U.K.
 
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@touring300 avatar
GTS 300ie Touring 2013 - Signora D'argento
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Posts: 2092
Location: Lancaster, U.K.
UTC quote
It sounds like a wiring issue. Check all the connections and ground wire.
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Ossessionato
2018 GTS Super
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Posts: 2123
Location: Googleville
 
Ossessionato
2018 GTS Super
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Posts: 2123
Location: Googleville
UTC quote
If oil level is fine another thing that can cause this is oil that's too thin. Does owners manual list more than one recommended viscosity? I'm assuming it's hot all the time where you live, try troubleshooting by going to thicker oil.

If problem persists these switches do go bad, cheap and relatively easy fix if necessary.
@jimc avatar
UTC

Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
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Posts: 43890
Location: Pleasant Hill, CA
 
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@jimc avatar
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: UTC
Posts: 43890
Location: Pleasant Hill, CA
UTC quote
Kimpheng wrote:
To Jimc, Viso, Mopedlar,JKJ-FZ6,

I have checked the oil dipstick, the oil was normal. It really not often happen, the light just show up for 3-4 second than it will disappear.
Not just a blink then. Look for chafed wiring.
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