Modern Vespa

Starting a new thread for my clutch...

I've got a Cosa clutch coming in the mail tomorrow or the day after. Rover Eric says there's some other part besides the pressure plate that I'll need.

Does this ring a bell with anyone?

Anyone got some institutional wisdom on installing the Cosa clutch that they'd like to share with the class?

You ordered the Cosa nut right?

Andrea

No, but I guess I had better do that if I want to ride this weekend. I've got a spare nut for a stock clutch, but I guess that one won't work. The gap inside the Cosa looks too big.

Come to think of it, if the pressure plate is there for contact with the brass pushpin and actuator, will a stock pressure plate work on a Cosa clutch?

check the hight of the basket turrets..... they should be 21-22mm in depth.

iv just had to filke down two clutches that had been machined to 19mm.

I've been reading about people filing down the clutch cover and filing down the engine case. I'm not so eager to put a drimel to my engine case.

I'm also reading that you can get a thinner washer for the clutch, or file down a thicker washer; to be sure that the clutch is tightened down sufficiently; that the woodruff key is the right size.

Sounds like a lot of variables. My clutch is due to arrive today. I'll start tinkering and measuring this afternoon.

Any word on the pressure plate? Will the stock pressure plate work?

Jeez, you'd think when you buy a "complete clutch" that it would really be complete and ready to install.

in that last thread regarding cosa clutches, i told someone to remove the thrust washer behind the clutch and he said it seemed to work fine after that.

So, ..that's an option.

What is a Cosa anyway? I always see parts for Cosa listed with the P/PX/T5 scoots, but I have never seen a Cosa. I always figured it was a PX

Cosa

It was basically the last, most "modern" iteration of the P-series. It only was made for a few years, and only sold in Europe. It, and the "Sfera" are the two obvious "pre-modern" piaggio bikes. The ones you can clearly see the transition from the P-series to the ET2/ET4. Maybe less-so with the sfera.

And a picture of the Sfera...



Not to be confused with....


Or

Sfera looks like a typhoon precursor

Excellent finally a definition for the Cosa Bombed out for the vintage rallys
Bombed out for the classic rallys
Bombed out for the modern rallys

If theres a rally for the pre-modern iteration of the P-series.

I´m going, will there be free cupcake and punch?

Yes but only if you bring it, the other guy with the Cosa is sick of providing refreshments.

I don't mind the cosa, interesting bike. Never seen one in person. Can we get some pictures of yours louispain?

You already have a P200, so you shouldn't have to grind on anything. The grinding is for folks who put a Cosa clutch (or larger P2 clutch) into 125/150 cases. In that case you have to grind down the oil catching ridge on the case and cover. Yours should fit fine.

Everything else should fit OK, use the same washer or metering gear behind the clutch (between clutch and seal) you already have on there and use the new Cosa nut and wavy washer to tighten it on. Never hurts to use a new woodruff key, although the size is the same. The old pressure plate from a P200 clutch should fit into the new clutch in your application (125/150 use a different design).

If the new clutch is a quality unit then everything should work out fine. There was an issue with tolerances on some of the pattern Cosa baskets which can cause no end of grief and frustration... pajd refers to this above.

If you get everything back together and you have issues with clutch drag or creep, that's when you have to start pulling things out, measuring, and trying to compensate with different size washers or filing down the basket.

Sin problema

1990 Late Mk1 Cosa. pre-modern iteration of the P-series
Pros - Useful daily ride with plenty of storage space.

Bagel here on MV put a Cosa clutch in our p200e and didn't have any trouble at all..Just took him a little bit of time..Not sure if he had any extra parts or not, but it appeared to be installed without any glitches or drilling.

That's what I like to hear. I'll just have to wait a few hours and see if the complete clutch I ordered will come with the Cosa nut and washer. Thanks, hp.

I said "pre-modern" to differentiate it from the MODERN vespas, beginning with the ET2/4

If you were looking at it from an architectural point of view, it would be classified "post-modern" i think, because it's a classical style ( the original vespa ) .... but with a modern twist and modern use of materials ( the ET-style glovebox, lots of plastic parts on it, etc ). I think that's pretty much the definition of "post-modernism" by architectural standards.

So, it's post-modern rendition - a precursor to the current "modern" vespa lineup.


Oh, and congratulations. I just blessed you with my 5000th post Hopefully that works like a lucky rabbit's foot on your cosa clutch installation.

Nice! Congrats on slacking more at work than I do even!

The only online catalog I've found that has the Cosa clutch nut is SPD, but I don't see a Cosa clutch nut washer.

Eric, thanks for the 5000th post. I hope this thread is worth it.

nope. Totally wasted.

I was going to use it to start a "[NSR] What's the best floormop for a scooterist?" thread in the modern section.

Or i could have used it to bump one of my old NSR's.

like this gem.

https://modernvespa.com/forum/topic19969

Save that one for post 10,000.

Just use the phone for this one. I know it's retro, but most shops don't list every stock item on their site.

This could be good... Put in a call to Scooter Works' technician. He did a little digging around and called back to say that on a P200E the stock nut with no washer should hold a Cosa clutch as long as it's torqued down well.

I remember when putting on the clutch after my last rebuild that I put a finger dab of white bearing grease on the brass push pin. Is this necessary?

I also found out that my engine is actually a Rally 200 (VSE) on a VSX frame. I new the engine wasn't the same year as the frame. Hope this isn't going to make any big differences in the parts and work I do on it.

I'm PRETTY sure the P200 engine shares the Rally 200 vin VSE1M in a VSX1T frame.

It's kinda like how my Jet200 still starts with the SX200 VIN number, even though it's not really an SX.

That's what Ryan (?) at Scooter Works said. When Vespa discontinued the Rally and introduced the P200 they still had a lot of Rally engines left over and just kept putting them on the new P frames.

I guess I still need to oil the cork plates on a Cosa clutch, so I won't be riding tonight.

This sounds like a bad idea to me, especially if you are relying on someone who had to dig around to come up with this. If you must use the stock nut, at least use the tab washer that goes with it. Best idea is to use the nut and washer designed for the clutch.

I think you're right, hp--looks like a bad idea.

I'm going to order the Cosa nut and just deal with the buses for a couple more days.

Oh, but I do have a question. How the hell do you get the circlip into the pressure plate? This is killing me!

dumb question - do you need to pull the clutch to replace the clutch-side seal? Or can you get to it from the other side?

The only seal I can think of is the one around the clutch cover, in which case you could leave the clutch on.

You would have to take the clutch off to get to the other side of the engine anyway, right?

You don't have to pull the clutch to split the cases, if that is what you mean.

Hmm. Someone more experienced will have to field that one.

You wouldn't happen to know how to fit that circlip into the pressure plate, would you?

Alas, no. I know pretty much nothing save what I've read hear and on Vespamaintenance.com

I Hulked out on it and got it in, but I think I might have put the ends in the wrong holes. Closed end in the small hole, open end in the big one.