I am new to the forum but have been lurking about for a couple of months. You guys are great and there is vast knowledge base here!
I am in the process of completely redoing my 1980 P125X American Spec. At the time of this post the scooter is completely torn down and almost ready for sandblasting and powder coating and paint.
History of the scooter: I purchased it in Sept 2021 with 5,400 Miles on it. It ran decent and started within 1 or 2 kicks. The engine was pretty grimmey with caked on oil on the outside and caked on oil found behind the flywheel. So it was in need of shaft seals. The scooter would top out at 45MPH (GPS Verified). The speedo is reading about 8-10 MPH low. The ride is very good with no rattles or shakes or weird vibrations. I don't care for the blue color so that will be changed! It has the BBQ rack with the "Vespa" embossed rear seatback pad. That will come in handy for two up riding.
Plans for the Scooter:
Body: I have already welded up the mounting holes in the frame for the US Spec Taillight and have pre fitted a Piaggio European taillight I have also welded up the mounting holes for the side reflectors on the fender (mudguard).
New Color Scheme: I think I will go with an "Italian Flag Color Scheme" Green, White and Red on the leg shield with Red and Green Cowls . The frame and horn cover will be white.
Speedo: I have a new SIP 2.0 digital speedo to replace the original. I will also be installing a new SIP Fast Flow fuel tap to compliment the speedo which will give me a warning of low fuel displayed on the Speedo. In addition I will be utilizing the SIP cylinder head temperature sensor as well. Since the SIP 2.0 Speedo does not have a "Neutral" indicator light, I have installed and pre fitted a small green LED just below the high beam indicator light on the steering top panel.
Suspension: New front and rear shocks and rubber bushings will be installed, new wheel and fork bearing/bearing races will be installed. New brake shoes will be installed.
Electrical: The original wiring harness is excellent shape. The only wires that needed replacing are the stator wires and the 6" green kill wire at the engine. The green wire in the harness and in the handlebar housing is in mint condition! All turn signals will be replaced with the chrome bodied clear lens units.
Controls: New SIP teflon lined cables will be installed.
Engine: Here's where I need some guidance. I will be replacing all seals, bearings etc. The gears look good. I will be replacing the shifting cross and the kick start gear. I will be replacing the gear shim with a 2.5mm one. New clutch plates will be installed too.
I have a Mazzuchelli flowed - stroked crank. I also have a P150X Cylinder that's been bored to second oversize 58.2MM. I have a new Piston/Rings and head to match the cylinder. I also have a new SI 24 Carb and air filter to replace the SI 20. I believe it has a 115 main jet in it. I have a SIP Road 2.0 Exhaust with the twin pipes for it too. Will this set up work? I would like the scooter to cruise along between 55-60 MPH. Most of the time will be riding around at speed less that 40 MPH but If I venture into town I will need to take a highway for about 10 miles. That's why I would like a bit more speed.
Sorry for the long post! Any help is greatly appreciated!
Here are some pics of the project!
Last edited by Hec In Omaha on Mon, 27 Feb 2023 03:36:36 +0000; edited 6 times