Vespa Geek

Veeeery interesting. I remembered the other day when I adjusted the points gap and checked the timing that I replaced the spark plug on the VBB at the same time that I made the gap adjustment. The gap was off, by the way. I think it was well over .050mm, and should be (according to the Haynes manual) about .035-.040mm. I set it to .040.

I’m now wondering if these issues are not timing-related at all, and are in fact, caused by a rich condition. When I pulled the plug yesterday, I noticed that it’s fairly well oil-fouled. There’s oily residue on the electrode and on the threads of the plug itself.

I’m going to stop by Pep Boys on the way home and pick up a couple of plugs and see if I can’t get it to run for a bit on the new plug. If it does and then fouls, I think maybe I have a rich running condition on my hands, and not the ignition issue I first thought.

Who knows… I’ll change the plug and report back.

This entry was posted on Wednesday, September 3rd, 2008 at 5:02 pm and is filed under Vespa Maintenance. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.