Modern Vespa

John, there's one more Super G available from the team order we did when they came out. They came with the improved pistons and the center plug CNC head. If Terry's still in Greece and can bring it to the US when he gets back, I can ship it to him...

i’m totally lost on what a super g is ….🤣

Here you go...

https://modernvespa.com/forum/post2303596#2303596

It won't take 40 pages to jet in a Malossi 166 with a 20.20. Just start with Malossi's recommended jetting, see what you get, and fine tune accordingly. I'll bet you can do it in one page max.

Super G is VMC's name for its cast iron 177 kit. I believe the "G" refers to "ghisa," which is the Italian word for cast iron.

Clean cases mmmmm

yesss very interesting I was eyeing that kit

time to watch Sausage rebuild an engine again....

That clutch seal looks wrong to me. Newer cases usually had the metal one. I assume you'll be replacing the seals so check if there's a groove or not on the seal's seat...

If there's a groove you go with a rubber one, if not you need a metal one. Metal one needs a 0,5mm shave cause if you install it flush it will rub on the bearing's center race and pop out...

If you’re planning to build this engine, run it for a little while in the 10” PX, then swap it over to the 8” VBB, I’d focus on the gearing. Just sayin.

Thanks SaFis - I will report back. I've just ordered a standard Stella rebuild kit from Scooter Mercato so I hope the seal I get matches the cases I have . I didn't pop any bearings out yet as you see. I like to have clean cases to work - so much nicer.

Seal and case sneak peek

My guess here was that I could build the engine, sort the jetting, putt around, and then figure out what primaries could keep me at the same RPM's with 8". That means a full tear apart to swap the primaries when it's time to go in the vbb, but with the engine having been freshly built it should be an easy in/out.

One more

clean and tidy! I'm into it!

no more copper spray

Rubber seal it is...

so gearing...

looks like 21-68 primaries

tree ratios 12-13-17-21 (standard)

loose gears 57-42-38-35 (4th gear like P200 instead of P125)

I hate the 35t 4th, that will need to change to 36t. That sucked for hills on a 200, it will suck again here. The primaries are OK if I use the P150 top end, but 22 tooth clutch will be better for anything kitted. Seems like at least a T5 4th should be ordered.

If you go to 8", you need primaries to cut the revs, looks like 23-65 like a P200 pretty much matches the RPM for MPH. Can you run P200 primaries in the small case? I think so. It already seems to have a 7 spring clutch. That will be the plan for later.

comparison illustrated, with 36 tooth used

Anyone have a trick for getting these off without ruining them? 2nd one I’ve tried and broke both…

Try Jonathan Gick for a VMC kit. I think it gickspeed on here.

Replace with this…

https://www.sip-scootershop.com/en/product/emblem-piaggio-horncover_57646400

it's a sticker??

Badge. Clips in place. It’s the same shape from behind…

One of the great things about having parted out that Stella is I have doubles on most stuff, so the fear factor on trying stuff goes down. The glove box on the px didn’t want to close right, and I had to remove it to do a bit of rust management before fitting a rubber leg shield bead anyway. So I decided to make it fit by selectively bending in appropriate places. Fits much better now! The leg shield I just sanded and put a bit of primer on the open rust before putting on the rubber. Looks much better.

Of course one glove box screw/nut was rusted into place and required Dremel work - doh! 5 minute job becomes 1 hour job...

Glove box before…

Px engine exploration …

Stator wiring looks fresh, flywheel has good magnetism, cdi looks a bit worse for wear.

Bore looks clean but looking down the intake you can see why the crank won’t move….

Looks like a great project..are you going with a barn find (survivor) look finish when your finished...or are you going for a pebble beach refurbish/restored look...?

The look we are going for here is worn in former scooter boy bike. I will have to do a paint job on a fender and the cowls, thinking burgundy as the red on the Stella cowls actually looks decent. Chrome crash bars will appear later. There’s too much work to go full on restore. Body is decent but not immaculate. It should be a solid runabout.

I’m thinking stickers on the bondo cracks 🤣🤣

You might be able to squeeze a few stickers in between the bondo cracks as well!

I’ve always wanted to sticker up a bike and I think this is the one!

So tell me, are there big differences in 2 port vs 3 port cases? This vnx engine looks hard (crusty!) and I have a 2 port motor also that could be build number 2 after the Stella engine…

feeler gauge! that's my go to, anyway.

I'm gonna try that next time. I've got 2 more of them in my cart at mercato for the next order

I know your pain... I usually break them on the modern bikes!

but that or a teeny-tiny screwdriver is usually the jam.

I suppose some RTV would work...

Double sided tape.

Raid the war department’s craft bins!

So how is it that one side of the reed block isn’t machined smooth?

I had all the P series stuff from scooterhelp, but found these yesterday. Very useful for my stella engine and stash of stella parts, and for the unique aspects of the arcobaleno - mine is 125, but this parts book should cover most differences from the regular P series book I have.

https://powersportsoutlet.com/image/catalog/pdf/STELLA-CATALOG.pdf

https://scooterworks.com/assets/PDF/PMVLX%20Vespa%20Service%20Manual.pdf

I'm definitely a parts book guy, I want them printed and at hand in the shop.