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Member
1966 Vespa 180 Super Sport
Joined: UTC
Posts: 34
Location: The Netherlands
 
Member
1966 Vespa 180 Super Sport
Joined: UTC
Posts: 34
Location: The Netherlands
UTC quote
SoCalGuy wrote:
Quote:
... it sure is clean and original looking, and already cost me a fortune 😂...
Oh my. That is an outstanding Grimstead repro.
The guy who built it even collaborated with Eddy Grimstead on this bike before he sadly passed away. Got the approval nod though
@moto64 avatar
UTC

Molto Verboso
'64 Motovespa 150S (177) , '65 VBB, '66 Allstate SF, '66 180SS
Joined: UTC
Posts: 1883
Location: S.Salem, NY
 
Molto Verboso
@moto64 avatar
'64 Motovespa 150S (177) , '65 VBB, '66 Allstate SF, '66 180SS
Joined: UTC
Posts: 1883
Location: S.Salem, NY
UTC quote
It's gorgeous !
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UTC

Member
1966 Vespa 180 Super Sport
Joined: UTC
Posts: 34
Location: The Netherlands
 
Member
1966 Vespa 180 Super Sport
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Posts: 34
Location: The Netherlands
UTC quote
A standard exhaust i put on is in the little movie clip, a weld broke on the original exhaust, so I had to fix that first. And indeed an oldie
@socalguy avatar
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bodgemaster
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
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Posts: 7155
Location: So Cal
 
bodgemaster
@socalguy avatar
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: UTC
Posts: 7155
Location: So Cal
UTC quote
Well I guess the question is what exactly is "standard" in this case? From your description it doesn't sounds like your engine is very standard ... a third over P200 piston that's been welded and put in a piston-ported cylinder bored out to 227? Holy cow.
UTC

Jet Eye Master
PX221 MHR, O tuned PX200, PX125 and some motorbikes
Joined: UTC
Posts: 4598
Location: London UK
 
Jet Eye Master
PX221 MHR, O tuned PX200, PX125 and some motorbikes
Joined: UTC
Posts: 4598
Location: London UK
UTC quote
hibbert wrote:
Great info Jack do you think the 135 main jet might be contributing to the wet plug?
I think the 135 main jet is covering for the pilot failure. Obviously way too big but we'll come to that later.
OP
UTC

Member
1966 Vespa 180 Super Sport
Joined: UTC
Posts: 34
Location: The Netherlands
 
Member
1966 Vespa 180 Super Sport
Joined: UTC
Posts: 34
Location: The Netherlands
UTC quote
SoCalGuy wrote:
Well I guess the question is what exactly is "standard" in this case? From your description it doesn't sounds like your engine is very standard ... a third over P200 piston that's been welded and put in a piston-ported cylinder bored out to 227? Holy cow.
Haha yes, not exactly the easiest place to start like this, but I'm sure we will get this sorted at some point, with all the advise and expertise here!
Just for clarity - I took the sports exhaust off to get welded, and put on a standard exhaust like this one and then filmed the stuttering.

The one that should be on there is an origingal (40-50 year old) Ken Cobbing sport exhaust, very much like this one
UTC

Ossessionato
Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E
Joined: UTC
Posts: 2537
Location: Siam
 
Ossessionato
Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E
Joined: UTC
Posts: 2537
Location: Siam
UTC quote
Moto64 wrote:
It's gorgeous !
I wanna see the whole bike. Did I miss something?
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UTC

Member
1966 Vespa 180 Super Sport
Joined: UTC
Posts: 34
Location: The Netherlands
 
Member
1966 Vespa 180 Super Sport
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Posts: 34
Location: The Netherlands
UTC quote
I put a couple of pictures in the scooter gallery section
All iphone, I have not taken the time to make some proper pictures...
UTC

Ossessionato
Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E
Joined: UTC
Posts: 2537
Location: Siam
 
Ossessionato
Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E
Joined: UTC
Posts: 2537
Location: Siam
UTC quote
cloudyroads wrote:
I put a couple of pictures in the scooter gallery section
All iphone, I have not taken the time to make some proper pictures...
Thanks. It's great looking! Does it have that cool looking unique speedometer?
OP
UTC

Member
1966 Vespa 180 Super Sport
Joined: UTC
Posts: 34
Location: The Netherlands
 
Member
1966 Vespa 180 Super Sport
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Posts: 34
Location: The Netherlands
UTC quote
It does!
Another thing that doesn't work properly yet, so that has to be looked at as well...
Forum member supplied image with no explanatory text
UTC

Ossessionato
Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E
Joined: UTC
Posts: 2537
Location: Siam
 
Ossessionato
Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E
Joined: UTC
Posts: 2537
Location: Siam
UTC quote
cloudyroads wrote:
It does!
Another thing that doesn't work properly yet, so that has to be looked at as well...
I love how it says 100 mph!👍
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UTC

Member
1966 Vespa 180 Super Sport
Joined: UTC
Posts: 34
Location: The Netherlands
 
Member
1966 Vespa 180 Super Sport
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Posts: 34
Location: The Netherlands
UTC quote
Update: I have cleaned the carburetor over the weekend, put all new jets in, and put the welded sports exhaust back on.
It's (she's?) running at least 75% better and not stuttering as violent anymore, but it's not completely gone. Thanks so much again for all the tips, we are getting there!
The 135 main seemed a bit too big, you think? I guess now it comes down to more finetuning to make it perfect.
@moto64 avatar
UTC

Molto Verboso
'64 Motovespa 150S (177) , '65 VBB, '66 Allstate SF, '66 180SS
Joined: UTC
Posts: 1883
Location: S.Salem, NY
 
Molto Verboso
@moto64 avatar
'64 Motovespa 150S (177) , '65 VBB, '66 Allstate SF, '66 180SS
Joined: UTC
Posts: 1883
Location: S.Salem, NY
UTC quote
The stock main for the SS is 120. I don't know what the bigger cylinder would need, but 15 over that seems pretty fat. Have you tried walking the main down ?
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UTC

Member
1966 Vespa 180 Super Sport
Joined: UTC
Posts: 34
Location: The Netherlands
 
Member
1966 Vespa 180 Super Sport
Joined: UTC
Posts: 34
Location: The Netherlands
UTC quote
Moto64 wrote:
The stock main for the SS is 120. I don't know what the bigger cylinder would need, but 15 over that seems pretty fat. Have you tried walking the main down ?
Sorry, I don't understand what "walking the main down" means - assuming trying smaller jets? I have to order a pack of those to try probably?
@swiss1939 avatar
UTC

Ossessionato
P208, Stella VMC Stelvio 187, Stella 150, VNX1T, V9A1T, V9B1T, 02 Sportster XLH1208
Joined: UTC
Posts: 4110
Location: Staten Island, NY
 
Ossessionato
@swiss1939 avatar
P208, Stella VMC Stelvio 187, Stella 150, VNX1T, V9A1T, V9B1T, 02 Sportster XLH1208
Joined: UTC
Posts: 4110
Location: Staten Island, NY
UTC quote
your assumption is correct. walking down.. 1 size at a time.. to find the correct jet.
OP
UTC

Member
1966 Vespa 180 Super Sport
Joined: UTC
Posts: 34
Location: The Netherlands
 
Member
1966 Vespa 180 Super Sport
Joined: UTC
Posts: 34
Location: The Netherlands
UTC quote
I'll go try that! Found some info on the site in the meantime as well
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