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@brentscheffler avatar
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'78, '80 P125X, '80 100 Sport, '74 150 Super
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@brentscheffler avatar
'78, '80 P125X, '80 100 Sport, '74 150 Super
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Location: Seattle
UTC quote
My current setup on my temp motor until my main project is finished:

Pinasco 177, port matched
Piston ported by Hot Rod Al
Cut/flowed/rebuilt crank by Hot Rod Al
DRT reed block with SI (Spaco) 24/24 carb
SIP Road Pipe 2.0 (ditched the Boomstick for a more smooth/even-torqued ride)
Vespatronic
P200 gear stack with 21/68 primary gearing
160/BE3/122 main stack
55/160 idle jet

The thing rides nice and smooth throughout the middle and upper rev range. I might swap in a 22 tooth clutch gear for a bit more top-speed, but like I said, it's a temp setup until I can get my 210 project on the road. I just wanted something to ride while the weather is nice up here in Seattle.

Now here's the problem: With the 55/160 idle jet (2.90 ratio), it's just a tad too rich. I have the air/fuel mix screw at about 1/4 turn out and it's still too rich giving a slight boggy experience in the lower throttle range. I want to try the 48/140 (2.92 ratio) which is one size leaner than the 55/160 but am having a hell of time sourcing one. I ordered a pretty big set of idle jets from SIP (including the 48/140) but they subbed it out for something else that has a different ratio (3.0). I tried that jet and it's too lean even at 4 turns out.

Anyone know where I can get this elusive jet from? I've tried all the usual state-side sources, but have come up empty-handed.

On a side note, I found another Spaco mixture screw in my parts/bits bin that has, for lack of a better word, a "fatter" more "blunt" tip than the one I am running now. Not sure where that needle came from. Maybe from a T5 carb? Would that be of any use to me?

Any input greatly appreciated.

Thanks.
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Veni, Vidi, Posti
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Location: Tega Cay, SC
 
Veni, Vidi, Posti
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UTC quote
Just looked through all of mine, don't have it. Sorry
@vader19 avatar
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Mr. Clean
P,SUPER,V90, 50 Special
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@vader19 avatar
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@nebulae avatar
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Vespa Rally 210
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Location: uk
 
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@nebulae avatar
Vespa Rally 210
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Location: uk
UTC quote
I'm curious about that DRT reed block you speak of and the fact you're using it with an SI carb.
Is this an LML engine you're talking about?
@ginch avatar
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Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
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Posts: 8888
Location: Victoria, Australia
 
Veni, Vidi, Posti
@ginch avatar
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8888
Location: Victoria, Australia
UTC quote
nebulae wrote:
I'm curious about that DRT reed block you speak of and the fact you're using it with an SI carb.
Is this an LML engine you're talking about?
http://www.sip-scootershop.com/en/products/intake+manifold+drt+_40311600

External inline image provided by member with no explanatory text

This the one?
@nebulae avatar
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Vespa Rally 210
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@nebulae avatar
Vespa Rally 210
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UTC quote
That's expensive at £122
The reed I use with my SI cost only £40 odd.
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@brentscheffler avatar
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'78, '80 P125X, '80 100 Sport, '74 150 Super
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Location: Seattle
 
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@brentscheffler avatar
'78, '80 P125X, '80 100 Sport, '74 150 Super
Joined: UTC
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Location: Seattle
UTC quote
Ginch wrote:
nebulae wrote:
I'm curious about that DRT reed block you speak of and the fact you're using it with an SI carb.
Is this an LML engine you're talking about?
http://www.sip-scootershop.com/en/products/intake+manifold+drt+_40311600

External inline image provided by member with no explanatory text

This the one?
Yup, that's the one.
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@brentscheffler avatar
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Addicted
'78, '80 P125X, '80 100 Sport, '74 150 Super
Joined: UTC
Posts: 717
Location: Seattle
 
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@brentscheffler avatar
'78, '80 P125X, '80 100 Sport, '74 150 Super
Joined: UTC
Posts: 717
Location: Seattle
UTC quote
nebulae wrote:
Is this an LML engine you're talking about?
Nope. P125X block. I f*cked up the rotary pad when opening up the intake a bit. Someone local had the DRT (used of course) so I bought it and matched the intake to that.

But I agree, it's damn expensive for such a simple design.
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UTC quote
have you drilled those 2 small holes in the stock air filter...??
doing that and using a richer idle would balance each other out
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@brentscheffler avatar
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'78, '80 P125X, '80 100 Sport, '74 150 Super
Joined: UTC
Posts: 717
Location: Seattle
 
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@brentscheffler avatar
'78, '80 P125X, '80 100 Sport, '74 150 Super
Joined: UTC
Posts: 717
Location: Seattle
UTC quote
spiderwebb wrote:
have you drilled those 2 small holes in the stock air filter...??
doing that and using a richer idle would balance each other out
Sorry, forgot to mention I have the Polini vortex venturi deally on it - so no stock air filter.

I just need to source that 48/140 idle jet I think.
@vader19 avatar
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Mr. Clean
P,SUPER,V90, 50 Special
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Mr. Clean
@vader19 avatar
P,SUPER,V90, 50 Special
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Posts: 10205
Location: This is't my locker!
UTC quote
[quote="brentscheffler"]
spiderwebb wrote:
I just need to source that 48/140 idle jet I think.
What am I invisible? none of those links suit you? You can just order it from Mark at Scooter-Speed and the shipping will be from LA to you.
@socalguy avatar
UTC

bodgemaster
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: UTC
Posts: 7223
Location: So Cal
 
bodgemaster
@socalguy avatar
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: UTC
Posts: 7223
Location: So Cal
UTC quote
Anyone heard from Vader lately?
@vader19 avatar
UTC

Mr. Clean
P,SUPER,V90, 50 Special
Joined: UTC
Posts: 10205
Location: This is't my locker!
 
Mr. Clean
@vader19 avatar
P,SUPER,V90, 50 Special
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Posts: 10205
Location: This is't my locker!
UTC quote
SoCalGuy wrote:
Anyone heard from Vader lately?
Exactly! Sheeesh!
@ginch avatar
UTC

Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8888
Location: Victoria, Australia
 
Veni, Vidi, Posti
@ginch avatar
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8888
Location: Victoria, Australia
UTC quote
brentscheffler wrote:
I just need to source that 48/140 idle jet I think.
How many more sources do you need?
@spiderwebb avatar
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UTC quote
[quote="Vader19"]
brentscheffler wrote:
spiderwebb wrote:
I just need to source that 48/140 idle jet I think.
I did not write that Vader
mis quote
OP
@brentscheffler avatar
UTC

Addicted
'78, '80 P125X, '80 100 Sport, '74 150 Super
Joined: UTC
Posts: 717
Location: Seattle
 
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@brentscheffler avatar
'78, '80 P125X, '80 100 Sport, '74 150 Super
Joined: UTC
Posts: 717
Location: Seattle
UTC quote
Ginch wrote:
How many more sources do you need?
One more.


Kidding aside, what I should have said is "I just need to source it from one of the places suggested."
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