Vespa 90 ignition conversion
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Enthusiast
'81 Vespa P200e, '85 Vespa PX125e, '70 Vespa 90 basketcase
Joined: 11 Jun 2020
Posts: 79
Location: St. Catharines, Ontario
Tue Apr 06, 2021 4:56 pm quote
Hey all,

Just rebuilding a V90 with a 1964 engine. Performance wise this stock engine will always be a 90cc engine....I already know this. The engine is built to stock. Now working on the whole chassis from the ground up.

I have been chatting with folks who state that converting the points system to electronic ignition (including the wiring loom to accommodate that) and a ET3 exhaust will give this stock engine a bit more punch.

My question is---how much punch? Sure the bike will run a bit more reliably...but how much more can I get out of it with these mods? will the increase in performance be significantly noticeable?

Any experience? Any objective accounts?

Let me know folks.
Thank you!
bodgemaster
63 GL, 76 Super (x 2), 74 Primavera (x 2), 06 Fly 150
Joined: 26 Sep 2013
Posts: 5809
Location: So Cal
Tue Apr 06, 2021 5:51 pm quote
You wont experience any reliability gain with an electronic ignition, and any performance gain with a stock motor will be negligible.

The points systems on these scoots are simple and dependable. Id bet solid state electronics have higher failure rates. They definitely cost more to replace when they fail.

A better exhaust, on the other hand, will give you a noticeable increase in power and would be a nice upgrade.
Addicted
Old douglas ..smallie with polini 115..super with nasco 177
Joined: 07 Nov 2013
Posts: 639
Location: New Zealand
Tue Apr 06, 2021 6:03 pm quote
first bit of bolt on power i ever got was putting a leo vice pipe on a 90 and up jetting two points.Instant noticeable acceleration and about 10km more top end

then comes bigger top ends, bigger carbs, cut cranks,gear ratio changes.

leo vince was the cheapie at the time ( 20 years now).. but it gave the easy .bolt on. no mod power i was after

Id go Polini banana these days

agree with So cal .." lecky nish" wont give noticeable power..a pipe WILL
Enthusiast
'81 Vespa P200e, '85 Vespa PX125e, '70 Vespa 90 basketcase
Joined: 11 Jun 2020
Posts: 79
Location: St. Catharines, Ontario
Tue Apr 06, 2021 6:23 pm quote
Bluecati wrote:
first bit of bolt on power i ever got was putting a leo vice pipe on a 90 and up jetting two points.Instant noticeable acceleration and about 10km more top end

then comes bigger top ends, bigger carbs, cut cranks,gear ratio changes.

leo vince was the cheapie at the time ( 20 years now).. but it gave the easy .bolt on. no mod power i was after

Id go Polini banana these days

agree with So cal .." lecky nish" wont give noticeable power..a pipe WILL
So based on what you gentlemen are saying is that ---I can simply add on an aftermarket exhaust with a carb upjet onto the stock 6V point system and gain some noticeable power?
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