So a guy a friend who was staying with me for a while left his dead puch maxi behind, and since winter I've been tinkering with it here and there trying to get it running. Motor was seized solid before but I got that loosened up and here's what I've done since.
New (china clone) bing 15mm carb
Running on 60 jet (as per treatland's guesstimation/suggestion. Also ran it on 82 jet that came with carb, didn't run that differently surprisingly.
disassembled and cleaned piston/cyl/rings etc and all new gaskets
Took apart muffler and cleaned/derestricted, reassembled (baffle still there).
Symptoms: Starts and runs fine, but full throttle immediately causes motor to die. Sweet spot seems to be about 1/4 throttle, it can get my 200 lb ass up to 25ish on my short street. 3/4 throttle on is no good.
I'm hoping my jetting is the problem. I've tried all pin positions and shortest pin seems best. Does anyone have any suggestions? Eventually I wanna do a 70cc kit and pipe but I kind of wanted to get it running properly and make sure I can register it without any problems before I dump any more cash than I have to.
If it sounds like a clear-cut jet problem let me know what you think is a good guess and I'll buy a few in that range.