Re: 77 Vespa Bravo Hard to Start wont stay running.

Ike Pipe /
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5mm is not a lot of gap. You want to be closer to a full cm. I'm still thinking that a new HT coil is in order.

Assuming your spark is fine, the only other reason for a wet plug with no firing is flooding, like you said. However, the carb is designed to overflow out of the top of the carb, and it would be hard to flood the cylinder even if you had a bad float needle. So too large a jet would explain that, but it seems to me to be an unlikely scenario.

The fact that the bike runs and dies also points to a bad HT coil. When the coil warms up it performs worse, classic HT coil issue.

New one on Amazon is 15 bucks. Emgo universal coil is a perfect fit.

You might consider making some videos of your symptoms. Show us the spark. Show us how it runs and then dies. Pics of your parts also. That would make it easier to help you.

This single post is part of a larger thread. Start from the top or view this post in context.
Subject Written By Posted
  77 Vespa Bravo Hard to Start wont stay running.Topic by: Kenny Shinneman Kenny Shinneman 09/10/19 09:06PM
  Re: 77 Vespa Bravo Hard to Start wont stay running.Re: P D P D 09/11/19 08:10AM
  Re: 77 Vespa Bravo Hard to Start wont stay running.Re: Kenny Shinneman Kenny Shinneman 09/11/19 10:33AM
  Re: 77 Vespa Bravo Hard to Start wont stay running.Re: Bad Cadillac™ Bad Cadillac™ 09/11/19 10:22AM
  Re: 77 Vespa Bravo Hard to Start wont stay running.Re: Kenny Shinneman Kenny Shinneman 09/11/19 10:38AM
  Re: 77 Vespa Bravo Hard to Start wont stay running.Re: alex . alex . 09/11/19 03:47PM
  Re: 77 Vespa Bravo Hard to Start wont stay running.Re: Kenny Shinneman Kenny Shinneman 09/11/19 04:20PM
  Re: 77 Vespa Bravo Hard to Start wont stay running.Re: Bad Cadillac™ Bad Cadillac™ 09/11/19 04:45PM
  Re: 77 Vespa Bravo Hard to Start wont stay running.Re: Bad Cadillac™ Bad Cadillac™ 09/11/19 05:45PM
  Re: 77 Vespa Bravo Hard to Start wont stay running.Re: pat splat pat splat 09/12/19 06:47AM
  Re: 77 Vespa Bravo Hard to Start wont stay running.Re: Ike Pipe Ike Pipe 09/17/19 11:58PM
  Re: 77 Vespa Bravo Hard to Start wont stay running.Re: Kenny Shinneman Kenny Shinneman 09/27/19 08:26AM
  Re: 77 Vespa Bravo Hard to Start wont stay running.Re: Ike Pipe Ike Pipe 09/28/19 12:14AM
  Re: 77 Vespa Bravo Hard to Start wont stay running.Re: pat splat pat splat 09/28/19 09:17AM
  Re: 77 Vespa Bravo Hard to Start wont stay running.Re: Richard Eberline Richard Eberline 09/28/19 10:38AM

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