newbie with a 50cc 4stroke scooter

[Baliguy]

Hi all,

I've been reading so much, but am still a little lost. I'd like to get fuel injection on a 50cc scooter. It is a single cylinder 4-stroke, so some things are simpler. It is challenging to find any information on the smallest of injectors. If I have to, I can make a throttle in the 20mm to 25mm. range. I am a little concerned about room in the exhaust pipe for a O-sensor, but maybe a bulge in the pipe can be added with the senor bung. I'm not sure what kind of air flow/mass sensor will be best with this tiny engine. I was thinking about adding a venturi and reading a vacuum signal there, but wonder why no one else does. Timing wheel? Where can I squeeze that in?

I would like maximum power as well as economy. So that means using ignition control, more sensors, maybe V3 board. Ok, I'm back to reading.

Baliguy - Steve

[Matt Cramer]

Welcome! There's some interesting write ups of small engines here that may be of help:

http://www.msruns.com/viewforum.php?f=97