So since breaking my knee on my hobbit a month ago I've sat and researched a million things. One was how to dial in a carb with exhaust readings. I've had 4 cars dyno tuned and thought hey I could do that with my peds. So I spent 180$ on the AEM wideband. Had a short 6x1 inch pipe with bung welded for sensor. Installed a lawn mower battery to the back and ta da it works. Ghetto zip tied and taped everything cause I'm removing after the tune.
Idles between 14.5 - 15.5
1/4 throttle 14.0 - 13.7
1/2 throttle 13.5 - 13.0
3/4 throttle 13.5 - 13.0
Full blast 13.5 to 12.5
I increased by increments of 2 while upjetting. So 54,56,58,60,62,64
Once I dialed it in to what I believe is good this is what I've noticed.
The less load on the engine the more rich you will run,
So if I'm going 37 mph on flat the guage reads 13.4.... Now when I was going down a steep hill at 37 it read 12.8-12.9... And at max speed so far 42 mph it read 12.5 "" four stroking hit here" (12.5) air fuel ratio
Ok I also noticed the opposite going up hill. When the load is increased the fuel leans out. If I floor it from a stop when I reach 20 mph it reads around 13.7. Now when I hit a hill and slow down to 20 mph due to the incline the airfuel ratio will lean out to 15.6-16.0.. I'm not to worried as there isn't anything you can do. There's no way to program a single jet carb for load differences.
So over all I'm quite happy with the money spent as it was fun and it works great. I read so many negative things about doing this but I had great success.
We also tuned my friend puch e50. It would only go around 44 when we bought it.. I'm not great at reading plug chops. Plus this was my first time tuning a 24mm carb with idle jets and needle jets blah blah. So with the wide band it was easy to see what needed to be changed at different throttle percentages. Now that it's dialed in he has seen 57 mph at a full throttle ratio of 12.8 on flats. Not bad. I'm stoked. Next bike will be my hobbit that I crashed and need to repair.
I hope people get a kick outa this article and maybe this helped someone in some sort of way. Happy blasting people!!!