Autolube question on P125x
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Enthusiast
Vespa 125 VMA, Vespa SS 180
Joined: 14 Feb 2018
Posts: 75
Location: Minneapolis, MN
Fri Apr 09, 2021 5:13 am quote
I just finished this P125x and have a question on plug color and autolube. When I first put the motor back in, I was premixing. The autolube had been disconnected when I bought it, so I wanted to get things running before connecting and checking the autolube. It's now hooked up and autolube is working. I had about 1/2 tank of premix left in the tank, which I topped off with gas. It's clearly running rich, as it smokes a little. My plug looks lean - does this sound right? Should I worry about it? Or just run it and check the plug on the next tank?





Molto Verboso
One or two fun scoots....nothing too precious
Joined: 17 Jul 2013
Posts: 1677
Location: UK (South East)
Fri Apr 09, 2021 5:17 am quote
Hello, out of interest, which colour code is that? Is it a Piaggio colour? I just had my PX200E painted in PIA 2/5 (original colour) and it looks identical. Yours looks great.

Cheers
bodgemaster
63 GL, 76 Super (x 2), 74 Primavera (x 2), 06 Fly 150
Joined: 26 Sep 2013
Posts: 5815
Location: So Cal
Fri Apr 09, 2021 5:42 am quote
Quote:
It's clearly running rich, as it smokes a little. My plug looks lean - does this sound right?
Not exactly. The smoke is the extra oil burning. It’s not a sign of “richness”.

Your plug looks lean because the extra oil from the pre-mix is displacing fuel and leaning the mix - it’s not making it richer.

If the autolube’s working, drain what’s left of the pre-mix and go with fuel only, or upjet. Otherwise you risk heat-seizing.
Enthusiast
Vespa 125 VMA, Vespa SS 180
Joined: 14 Feb 2018
Posts: 75
Location: Minneapolis, MN
Fri Apr 09, 2021 6:27 am quote
Thanks SoCal, that's what I needed to know.
Quote:
Your plug looks lean because the extra oil from the pre-mix is displacing fuel and leaning the mix
Probably just drain it to be on the safe side.
Enthusiast
Vespa 125 VMA, Vespa SS 180
Joined: 14 Feb 2018
Posts: 75
Location: Minneapolis, MN
Fri Apr 09, 2021 6:35 am quote
Quote:
Hello, out of interest, which colour code is that? Is it a Piaggio colour? I just had my PX200E painted in PIA 2/5 (original colour) and it looks identical. Yours looks great.
Couldn't tell you. That's the way I got it. Original color was silver. The red does look good. How about a picture of your PX200?
bodgemaster
63 GL, 76 Super (x 2), 74 Primavera (x 2), 06 Fly 150
Joined: 26 Sep 2013
Posts: 5815
Location: So Cal
Fri Apr 09, 2021 6:58 am quote
Cheers Langolson. That is a nice red. Whoever painted it liked it so much they sprayed the trim piece on the mudguard.
Enthusiast
Vespa 125 VMA, Vespa SS 180
Joined: 14 Feb 2018
Posts: 75
Location: Minneapolis, MN
Fri Apr 09, 2021 8:45 am quote
Quote:
Whoever painted it liked it so much they sprayed the trim piece on the mudguard.
Yep. The legshield trim, the speedo trim and a few other things, too. The good/bad is that they used a quality paint - it doesn’t come off with acetone or other solvents...
Hooked
PX
Joined: 28 May 2020
Posts: 128
Location: Bognor Regis
Fri Apr 09, 2021 9:40 am quote
It looks great. Any reason the it has that style of rear light on a stem? I've seen this type of stem on the us rally. What year was this px made.?
.lovely scooter , congrats
Molto Verboso
2007 Stella 225
Joined: 02 Nov 2019
Posts: 1673
Location: Rochester, Minnesota
Fri Apr 09, 2021 10:07 am quote
Could be some warped eclectic individual like myself who likes the tractor and tuna fish can lights. Thinking about putting one of them on Stella, if I can figure out how to cover up the extra holes.

If you just fill it up, that should get the premix diluted to 100:1, should help the lean issue if that is the cause.

Post up any modifications you've made such as exhaust and air filter. Along with your current jetting and someone with a similar setup can help with jetting if needed.
Enthusiast
Vespa 125 VMA, Vespa SS 180
Joined: 14 Feb 2018
Posts: 75
Location: Minneapolis, MN
Fri Apr 09, 2021 12:51 pm quote
Quote:
Any reason the it has that style of rear light on a stem?
I think this tail light was on all of the US P series Vespas. At least the ones I've seen.
Quote:
What year was this px made.?
It's a 1980.
Enthusiast
Vespa 125 VMA, Vespa SS 180
Joined: 14 Feb 2018
Posts: 75
Location: Minneapolis, MN
Fri Apr 09, 2021 1:16 pm quote
Quote:
Post up any modifications you've made such as exhaust and air filter. Along with your current jetting and someone with a similar setup can help with jetting if needed.
Christopher, I replaced all seals, bearings, o rings, clutch plates, cruciform, put a Polini 177 kit on it (thanks Scoot.net), no matching/porting was done, 22 tooth clutch, stock gears, drilled heart air filter, ScooterMercato economy P125/150 exhaust, stock 20/20 carb, jets right now are 40-120 idle jet, 160 air, BE3, 114 main. Timing is at 19 degrees. I had a 110 main jet in it before the autolube got hooked up and it seemed just about perfect. Think I'm in the ballpark?
Hooked
PX
Joined: 28 May 2020
Posts: 128
Location: Bognor Regis
Fri Apr 09, 2021 1:24 pm quote
Whats the impact of that 22 tooth cog on top end? How many extra mph?
Enthusiast
Vespa 125 VMA, Vespa SS 180
Joined: 14 Feb 2018
Posts: 75
Location: Minneapolis, MN
Fri Apr 09, 2021 1:58 pm quote
Quote:
Whats the impact of that 22 tooth cog on top end? How many extra mph?
Scooterhelp's gearing calculator said 55mph at 6000rpms. I've had it up to 46mph but didn't want to push it until I was sure all the kinks were worked out (and it wasn't going to seize). Also all the roads nearby are 30mph speed limit...



Molto Verboso
2007 Stella 225
Joined: 02 Nov 2019
Posts: 1673
Location: Rochester, Minnesota
Fri Apr 09, 2021 3:39 pm quote
Langolson wrote:
Quote:
Post up any modifications you've made such as exhaust and air filter. Along with your current jetting and someone with a similar setup can help with jetting if needed.
Christopher, I replaced all seals, bearings, o rings, clutch plates, cruciform, put a Polini 177 kit on it (thanks Scoot.net), no matching/porting was done, 22 tooth clutch, stock gears, drilled heart air filter, ScooterMercato economy P125/150 exhaust, stock 20/20 carb, jets right now are 40-120 idle jet, 160 air, BE3, 114 main. Timing is at 19 degrees. I had a 110 main jet in it before the autolube got hooked up and it seemed just about perfect. Think I'm in the ballpark?
I'm not familiar with a Polini 177, or the exhaust pipe, hopefully someone else will come along that is. Rich shouldn't hurt anything, lean can leave you walking home with a seized cylinder.

Do you have a cylinder head temperature gauge? Nice to see how hot your running, another tool to see if your close.

Polini 177 kit, no matching/porting was done,
Drilled heart air filter
ScooterMercato economy P125/150 exhaust
stock 20/20 carb, jets right now are 40-120 idle jet, 160 air, BE3, 114 main.I had a 110 main jet in it before the autolube got hooked up and it seemed just about perfect. Think I'm in the ballpark?

Timing is at 19 degrees.

22 tooth clutch, stock gears,
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