Long time lurker, first time poster! I'm having a little trouble with my 2006 LX150 project and have hit a wall on where to go next. I've restored quite a few neglected LX50's over the years but this is my first 150. I'm having an issue with getting my LX150 to start when cold or after sitting for a short period of time. It seems as if the bike does not want to start when the auto choke is engaged but once it disengages, the bike runs flawlessly. Here are the things I have done up to this point to help with the starting issue:
-New NGK spark plug
-New fuel and vacuum lines
-New Piaggio fuel valve
-New #38 pilot jet and New OEM Piaggio Main jet
-Adjusted mixture screw to a variety of different settings
-New Malossi Red air filter
I've also done other things unrelated to the engine such as belt, rollers etc. When the bike is warmed up, it runs and rides perfectly with no hesitations. It will restart and idle flawlessly if the bike has been running. To get the bike started for the first time of the day it seems like priming the accelerator pump several times will help get it started initially but the bike does not fast idle like other LX's I've had. I will need to hold the throttle slightly open to keep it idling fast enough to stay running.
One thing to note is that the previous owner of this bike took it to a motorcycle shop for repairs. It appears the carburetor had been opened at one point before my ownership as the float bowl screws were replaced with allen head bolts. I'm not entirely sure what they were doing in there. The bike was 100% stock when I purchased it and it has 2600 miles currently. Any tips would be greatly appreciated!