This may turn out to be quite a long thread so I might as well get started.
We had plans to go to Amerivespa in Chattanooga. Three weeks before I put my VBB and my Buddy 125 (ok..it is now my wife's Buddy!) in the shop for routine maintenance. I would have done all that myself but I was on the road for work and had zero time. Anyway..they buggered up my VBB and it wasn't going to be ready.
I searched all the forums, craiglists and ran across a candidate. Here is the listing
This scooter was complete frame off rebuild in 2001. Very nice scooter, cost over $5000 to rebuild. The body was striped, sandblasted and painted the front suspension was powered coated. The engine was rebuilt and all parts replaced. The Odometer is rebuilt but is in need of a new cable. This is a very fast scooter, the 150cc engine has been bored out to 187 and it has a performance exhaust. All work was done by Boris at 200cc.
I checked here and on Stella Speed before buying and got positive feed back. regarding Boris's work. Picked it up on the way and it ran OK. Gas was a little stale, rear tire was flat...but it ran and the price was right...and I REALLY NEEDED a sccot for Amerivespa. My alternative was to pick up a new Stella...and...well...it just didn't excite me.
So after getting it home, doing some research and some explanations from a gearhead here is what I think I know.
motor 1979 p125X (VNL3M checked motor No. on Scooter help)
Polini 177cc top end
Dellorto SI 20/20
Main Jet 96 Mixer tube BE5 Air corrector 140 Idle 140 45
Auto lube (Boris added a reservoir)
Speedo shows 4900 miles but the cable is broken so...who knows?
It has an autolube but the previous owner said he had been premixing. I don't know if the autolube works so I have been premixing 2% Klotz.
It was running ok for awhile but after warming up would loose power in 4th under load. I would pull over work the throttle a bit and it would seem to recover.
I knew the gas was old when I picked it up and I figured a carb cleaning couldn't hurt. I rebuilt the carb (it was pretty gunky)
It runs great for a while. Until it gets nice and warm. Then I start getting high revs with the clutch pulled in and then no power under load in 4th. Pull in the clutch and and it will rev fine without a load. Seemed like it might have been falling out of second a bit also.
There is a fair amount of oil on the bottom near the selector box.
After reading... searching...getting a few answers limited to "use search" I'm thinking that an oil seal may be gone, cruiciform may also be worn.
Could premixing instead of autolube have something to do with it? All I have been able to find is that they rarley breaki...and check it by adding oil to the resevoir.
I'm planning on picking up a compression tester later this week. I'm also planning on draining the gear oil (I already changed it once) and checking for gas.
If I have to tear it apart..well that's OK with me! I'm finishing up the Man Cave (insulated shed with A/C and cable) soon so I'll have a perfect work area. I'm mechanically inclined.various auto repairs including timing chains, exhaust manifolds water pumps etc. so I'm not afraid of diving in...actually kinda looking for an excuse. I mean...it's almost NASCAR season. What could be better than putting on the race and tearing a motor apart?
I also restore antique clocks so I'm good with things that have lots of gears and springs and small parts. I do find MV to be a much friendlier place than BBS or even SS.
So my question is
Am I on the right track? Should I try retorquing case bolts?
Thanks in advance for your help! I'll keep you updated and document all progress! iI really like this scoot and wouldnt mind putting sometime and money into it!