This Piece of crap (stella build?)
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Member
Joined: 23 Oct 2018
Posts: 8
Location: STL
Thu Oct 25, 2018 10:10 am quote
Long time lurker, first time poster.

TLDR version: bought a stella, down on power, rough shape...rebuild? Why not

Long version
Having been a long time motorcyclist, Racing motocross, some road racing, 'adventure' riding etc. I decided to come out of the closet about my interest in scooters. It started with a 2003 green stella 2T kind-of-sort-of-but-not really purchased for my wife. Rode it for a few months and loved it. Then came the tinkering...jetting, pipe, etc. Long/short the green one is going to stay stock so I began the search for an affordable Stella to mess with. Found an 'atomic Fireball' for sale. It was rough. Just sitting in the backyard of a college students yard falling apart. Test rode it and it was certainly low on power, meh. He took $700 for it so off we were. Got home and did what I should have done before buying it....took the cowl off and ran it. sounds like someone banging cast iron skillets together. Compression so low I could kick start it barefoot. Sh*t. So begins my first scooter tear down.

stella trailer.jpg
Coming home. Looks good from a distance.

stella garage.jpg
getting undressed

stella engine out.jpg
Lets just get right to it shall we?

Member
Joined: 23 Oct 2018
Posts: 8
Location: STL
Thu Oct 25, 2018 10:16 am quote
Are my pictures visible? not working on the PC but showing on the phone. Need to learn to upload here
Addicted
2014 GTV 300ie
Joined: 05 Mar 2016
Posts: 667
Location: Charleston SC
Thu Oct 25, 2018 11:58 am quote
I can see 'em fine. Looks like an interesting project...
Member
Joined: 23 Oct 2018
Posts: 8
Location: STL
Thu Oct 25, 2018 12:34 pm quote
Going downhill fast...

Got the jug off for a quick inspection

Piston is scored, rings are free

Cylinder is scored pretty bad, looks stock but ports may have been chamfered by a 6 year old with a grinder

Two base gaskets and two headgaskets

Cylinder head nuts were shanking out on the studs even with two washers, probably the reason for the low compression

Bronze flakes from the selector box

back together for a cleaning

stella scored piston.jpg
Scored piston.

stella cylinder head stud.jpg
shanked stud

stella cylinder head.jpg
Cylinder head.

stella cylinder head gasket.jpg
head gaskets...two

Member
Joined: 23 Oct 2018
Posts: 8
Location: STL
Thu Oct 25, 2018 12:35 pm quote
More pics

stella diry engine.jpg
shes dirty.

stella finger full of bronze shavings.jpg
Bronze flakes from selector box

Member
Joined: 23 Oct 2018
Posts: 8
Location: STL
Thu Oct 25, 2018 12:52 pm quote
Forgot to post the cylinder

stella scored cylinder.jpg

Ossessionato
2 X 74 Rallys, 66 Bluebadge, 76 ET3, 80 P200, 65 Li225 Silver Special, 86 Elite 80, 2015 HD Road Glide Special, 2011 Ural Tourist
Joined: 18 Jan 2012
Posts: 2968
Location: Oceanside/ SF
Thu Oct 25, 2018 1:38 pm quote
Fun project! Check out the disassembly instructions on here http://vespamaintenance.com. A lot of it should transfer over.
Member
Joined: 23 Oct 2018
Posts: 8
Location: STL
Thu Oct 25, 2018 8:05 pm quote
MJRally wrote:
Fun project! Check out the disassembly instructions on here http://vespamaintenance.com. A lot of it should transfer over.
Thanks! Iíll give that a look. The info is out there but itís scattered.
Ossessionato
LXV 150 Midnight Blue
Joined: 06 Dec 2010
Posts: 2124
Location: Karawang
Fri Oct 26, 2018 12:24 am quote
Should have pressure washed it before disassembly?

Get the cylinder honed new piston and rings . Good to go.
Molto Verboso
1979 P150X, 1983 P200E, 1996 PX200E, 2011 Yamaha Fazer 600 S2
Joined: 02 Aug 2015
Posts: 1182
Location: Veria, Greece
Fri Oct 26, 2018 1:28 am quote
Studs are probably upside-down. Threads should be longer in one side...
Ossessionato
Joined: 22 Oct 2011
Posts: 3734
Location: Tega Cay, SC
Sun Oct 28, 2018 4:49 am quote
Get the cylinder honed new piston and rings . Good to go.[/quote]
For the top end, maybe. But the flakes in there point to something worse. The crank is probably toasted. Anyway, time for a full tear down and rebuild. You are not alone, many of us have gone through this - especially with Stellas.
Member
Joined: 23 Oct 2018
Posts: 8
Location: STL
Sun Oct 28, 2018 3:15 pm quote
Well, Iím not pulling the plug entirely but I am going to cut my losses. Picked up a stock cylinder and piston. Going to do a good visual of everything and put it back together until baby #2 is here and things calm down (wife is literally due any day) comparison of Malossi piston vs stock. The PO obviously had a close relationship with his grinder

A6D14388-A45C-46C5-8939-9B4420EFBCF3.jpeg

Member
Joined: 23 Oct 2018
Posts: 8
Location: STL
Sun Oct 28, 2018 6:08 pm quote
SaFiS wrote:
Studs are probably upside-down. Threads should be longer in one side...
They are indeed.
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