Rebuilding a Spermy Vespa
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Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
Joined: 14 Jun 2017
Posts: 2134
Location: London UK
Tue Jun 09, 2020 12:04 pm quote
New piston alone won't fix that. Can get some really cheap kits, which is better than messing about with rebores. New stock complete is 195 euros.
Someone here might have a cylinder and piston they don't want. Sure there are many easy options.
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2:6
Joined: 11 Jan 2007
Posts: 7566
Location: San Francisco
Tue Jun 09, 2020 12:21 pm quote
new cylinder with Grand-Sport piston would be my go to. When I got the Rally I ordered one just to have on the shelf in case I ever needed it.

Stock but with a better quality piston.

https://www.sip-scootershop.com/en/products/cylinder+kit+serie+pro+200+cc+_41470700
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P125X, P200E
Joined: 02 Apr 2011
Posts: 686
Location: Fresno, CA
Tue Jun 09, 2020 9:57 pm quote
Crap... it looks like I'm going to be shopping for a new (or used) top end! Damn!
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P125X, P200E
Joined: 02 Apr 2011
Posts: 686
Location: Fresno, CA
Sat Jun 13, 2020 9:08 am quote
Someplace I saw a post on the default mixture screw settings for a 24/24 carb but I can't find it. As I recall, if the screw has coarse threads the default setting was one thing (1.5 turns?) but if the screw has fine threads the default setting was something else (2.5 turns?)

Can someone clarify this for me please?
Molto Verboso
Honda elite
Joined: 19 Jun 2007
Posts: 1036
Location: California
Sat Jun 13, 2020 10:12 am quote
Fatbear5 wrote:
Someplace I saw a post on the default mixture screw settings for a 24/24 carb but I can't find it. As I recall, if the screw has coarse threads the default setting was one thing (1.5 turns?) but if the screw has fine threads the default setting was something else (2.5 turns?)

Can someone clarify this for me please?
this is my understanding as well
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P125X, P200E
Joined: 02 Apr 2011
Posts: 686
Location: Fresno, CA
Sun Jun 28, 2020 12:30 pm quote
Is the area of the the case where the crankshaft turns supposed to be smooth? I've just noticed that that track is pitted on Spermy. Is that going to be a problem?

IMG_6472.jpg

IMG_6471.jpg

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P125X, P200E
Joined: 02 Apr 2011
Posts: 686
Location: Fresno, CA
Sun Jun 28, 2020 12:48 pm quote
Has the rubber for the P200 cowls changed over the years? I think I read someplace that the new cowl rubber that is being sold is different from the original and that it doesn't fit as well.

I just ordered new cowl rubber for and it looks quite a bit different from the original although I don't know if that is because the original has been stretched out of shape over the last 40 years or not.

In each pic, the original cowl rubber is on the left and the replacement is on the right. Any comments?

IMG_6470.jpg

IMG_6466.jpg

IMG_6469.jpg

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2:6
Joined: 11 Jan 2007
Posts: 7566
Location: San Francisco
Sun Jun 28, 2020 1:40 pm quote
the cowls for the P have a bit of a lip to help hold the rubber on. the earlier cowls did not. the replacement rubber you got if for the pre-P

The casting around the crank is fine. it's just the as cast surface.
Molto Verboso
Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E
Joined: 16 Apr 2011
Posts: 1436
Location: Siam
Thu Jul 02, 2020 3:22 am quote
Fatbear5 wrote:
Has the rubber for the P200 cowls changed over the years? I think I read someplace that the new cowl rubber that is being sold is different from the original and that it doesn't fit as well.

I just ordered new cowl rubber for and it looks quite a bit different from the original although I don't know if that is because the original has been stretched out of shape over the last 40 years or not.

In each pic, the original cowl rubber is on the left and the replacement is on the right. Any comments?
I went through this nonsense and just decided to keep the original, old, cracked rubber strips. A little Krazy glue and it's all sorted.
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P125X, P200E
Joined: 02 Apr 2011
Posts: 686
Location: Fresno, CA
Thu Jul 02, 2020 12:29 pm quote
Yes nomad, that's what I wound up doing. I washed the old rubber and treated it with Armorall and bolted it on to the cowl using a couple of screw posts. Looks fine.

IMG_6483.jpg

IMG_6484.jpg

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