The Ongoing Search for Maximum Power... except its a 48cc

I mentioned my project bike in another thread and some people showed interest in an update as I make slow but steady progress on modifications such as porting, planeing, jetting etc. (maybe Sturmey Archer trans upgrade?). This thread is where I will make those updates.

Little background: bought a 50cc kit off amazon for about $120. Replaced all the hardware with good stuff from the hardware store. Upgraded to a CNS carb and a little banana expansion chamber with a muffler, as well as a 50 tooth. There is more on the bike itself if your interested in this thread Off Road Bike Builds. Been a good little motor for me but the lack of displacement is leaving more to be desired. And the reason I don't just buy a Zeda or PK80, I guess enjoy the thought of squeezing as much power out of this thing as possible.

So, if no one really cares let me know and I won't bother to update, but I'd be happy to keep this thread alive if you guys want to see what I'm working on.

Thanks
 
I completely disassembled it. I went for a ride today with my friend and the bike ran great (including idling) so I don't know what changed but if it happens again ill have to do a deeper dive.

As far as an air leak on the carb, if your referring to the bronze tubes sticking out of the bowl and on the top by the filter I have those capped off.
That's kind of wild ,eh? You serviced it, it didn't like it for a day or so, but then came back.
 
Could have been any number of odd little issues. I've had a no start where my bullet connectors on the cdi had worked just a tiny bit loose over time, but it was enough to affect the continuity of the circuit and cause a weak spark. All I had to do was pinch the female connector closed again with a pair of needle nose and it fired right up.
 
Could have been any number of odd little issues. I've had a no start where my bullet connectors on the cdi had worked just a tiny bit loose over time, but it was enough to affect the continuity of the circuit and cause a weak spark. All I had to do was pinch the female connector closed again with a pair of needle nose and it fired right up.
Did your wife turn turn the sprinkler on it too? That's what I get for parking on the patio.
 
Who needs compression anyways...
IMG_8326.jpg
 
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