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Thu, 27 Oct 2022 14:33:49 +0000

Enthusiast
'79 P200e
Joined: Sun, 05 Jun 2022 15:04:55 +0000
Posts: 94
Location: SC
 
Enthusiast
'79 P200e
Joined: Sun, 05 Jun 2022 15:04:55 +0000
Posts: 94
Location: SC
Thu, 27 Oct 2022 14:33:49 +0000 linkquote
So I swapped the carb on my p200 recently to have the stock 2424 on it, definitely no issues with fuel, jetting, gunk etc.

Ride for approx 15 minutes then park it not running for five. Will not fire back up unless it sits for about half an hour or so. I took the plug out and noticed it is kinda oily and also noticed a small amount of oil coming 'up' from the exhaust flange towards the cylinder when running. See video below on that. Could this be too much blowby fouling the plug with oil due to wrong sizes ring gap or possibly oil pump sending too much?

https://youtube.com/shorts/UmZTZD5fuxY?feature=share
Fri, 28 Oct 2022 01:23:47 +0000

Molto Verboso
px200
Joined: Tue, 13 Apr 2010 09:09:46 +0000
Posts: 1269
Location: london
 
Molto Verboso
px200
Joined: Tue, 13 Apr 2010 09:09:46 +0000
Posts: 1269
Location: london
Fri, 28 Oct 2022 01:23:47 +0000 linkquote
Check the fuel tank air vent.

Grumpy
Fri, 28 Oct 2022 10:50:02 +0000

Enthusiast
'79 P200e
Joined: Sun, 05 Jun 2022 15:04:55 +0000
Posts: 94
Location: SC
 
Enthusiast
'79 P200e
Joined: Sun, 05 Jun 2022 15:04:55 +0000
Posts: 94
Location: SC
Fri, 28 Oct 2022 10:50:02 +0000 linkquote
Grumpy wrote:
Check the fuel tank air vent.

Grumpy
I'll check that too thanks. Tank is new so it should be good but I'll take a look.
Mon, 31 Oct 2022 00:49:09 +0000

Enthusiast
'79 P200e
Joined: Sun, 05 Jun 2022 15:04:55 +0000
Posts: 94
Location: SC
 
Enthusiast
'79 P200e
Joined: Sun, 05 Jun 2022 15:04:55 +0000
Posts: 94
Location: SC
Mon, 31 Oct 2022 00:49:09 +0000 linkquote
So I was reading an article and looking for feedback on the air/fuel mixture screw. I'm used to air/fuel screws (on other types of bikes) being adjusted to the point of highest revs, anything more outward will stutter and anything more inward will do same.

This article says 'tightening the screw will reduce the mix, and loosening it will increase the mix.' Should I not be adjusting for highest revs on the vespa? Instead adjusting inward more until its not sending too much oil through?
Mon, 31 Oct 2022 01:01:33 +0000

Molto Verboso
Joined: Fri, 14 Oct 2016 21:32:14 +0000
Posts: 1317
Location: northern New York
 
Molto Verboso
Joined: Fri, 14 Oct 2016 21:32:14 +0000
Posts: 1317
Location: northern New York
Mon, 31 Oct 2022 01:01:33 +0000 linkquote
Give this a read:

Wiki [D] Guide: SI Jetting Chart + How to Tune an SI Carb
Mon, 31 Oct 2022 02:08:31 +0000

Enthusiast
'79 P200e
Joined: Sun, 05 Jun 2022 15:04:55 +0000
Posts: 94
Location: SC
 
Enthusiast
'79 P200e
Joined: Sun, 05 Jun 2022 15:04:55 +0000
Posts: 94
Location: SC
Mon, 31 Oct 2022 02:08:31 +0000 linkquote
Thanks yeah sounds like I could lean it out some but I'll start from stock setting and go from there. Problem I have is running it hard for 15 minutes or so makes it almost impossible to restart most times and that's when the engine is warm and time is right actually adjust it.
   

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