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NGK B8ES or B9ES for vespa LX 50
OP
njackste
UTC
Hooked
Vespa LX50 2T 2005
Joined: UTC
Posts: 137
Location: Ireland
 
njackste
Hooked
Vespa LX50 2T 2005
Joined: UTC
Posts: 137
Location: Ireland
UTC quote
Hi, I have a vespa lx50 2 stroke, when my mechanic did a service on it last year he told me to make sure it had a number 9 spark plug in it because the cylinder would get too hot and wear out.
I recently had trouble with it bogging down at full throttle after replacing the air filter to a malossi double red sponge (even though you don't need to change gets for that one according to them, also has a silent pro exhaust and is derestricted), he upjetted from a 52 to a 63 and it runs great now.
I check the plug and it is a number 8 now.

Is this ok or should I change for a 9?

Thanks
@steelbytes avatar
SteelBytes
UTC
Veni, Vidi, Posti
2019 GTS 300 HPE SuperTech 73,000km
Joined: UTC
Posts: 7516
Location: Batmania aka Melbourne, Aus
 
SteelBytes
Veni, Vidi, Posti
@steelbytes avatar
2019 GTS 300 HPE SuperTech 73,000km
Joined: UTC
Posts: 7516
Location: Batmania aka Melbourne, Aus
UTC quote
what does the user manual say?
OP
njackste
UTC
Hooked
Vespa LX50 2T 2005
Joined: UTC
Posts: 137
Location: Ireland
 
njackste
Hooked
Vespa LX50 2T 2005
Joined: UTC
Posts: 137
Location: Ireland
UTC quote
User manual is a champion plug
@steelbytes avatar
SteelBytes
UTC
Veni, Vidi, Posti
2019 GTS 300 HPE SuperTech 73,000km
Joined: UTC
Posts: 7516
Location: Batmania aka Melbourne, Aus
 
SteelBytes
Veni, Vidi, Posti
@steelbytes avatar
2019 GTS 300 HPE SuperTech 73,000km
Joined: UTC
Posts: 7516
Location: Batmania aka Melbourne, Aus
UTC quote
I reread your post and saw the bit about up jetting ... I'll walk away now as my comments are now not so relevant
OP
njackste
UTC
Hooked
Vespa LX50 2T 2005
Joined: UTC
Posts: 137
Location: Ireland
 
njackste
Hooked
Vespa LX50 2T 2005
Joined: UTC
Posts: 137
Location: Ireland
UTC quote
Ok but thanks anyway.

My mechanic says the 9 was too cool so he swapped it for the 8 so it's fine
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