Mon Nov 22, 2021 2:10 pm

Ossessionato
VSX, Stella 177, Stella 150, VNX1T, V9B1T
Joined: 20 Jul 2018
Posts: 3476
Location: Staten Island, NY
 
Ossessionato
VSX, Stella 177, Stella 150, VNX1T, V9B1T
Joined: 20 Jul 2018
Posts: 3476
Location: Staten Island, NY
Mon Nov 22, 2021 2:10 pm linkquote
If you are really worried about any pitting try using a sanding wheel with the Dremel and just give it a light cleanup. But it doesn't look bad. Mine is also worse.
Mon Nov 22, 2021 2:19 pm

Not So Moderator
VNB VSC VBC VSX*2
Joined: 28 May 2008
Posts: 5439
Location: Hustletown, TX
 
Not So Moderator
VNB VSC VBC VSX*2
Joined: 28 May 2008
Posts: 5439
Location: Hustletown, TX
Mon Nov 22, 2021 2:19 pm linkquote
Seen worse and ran worse.

Agree with Chandlerman. Lap and go.
Mon Nov 22, 2021 3:27 pm

Hooked
Joined: 14 Oct 2016
Posts: 149
Location: northern New York
 
Hooked
Joined: 14 Oct 2016
Posts: 149
Location: northern New York
Mon Nov 22, 2021 3:27 pm linkquote
The rust doesn't look bad at all, especially as you were able to get it down to bright metal. It's not unusual to find light rust between overlapping spot welded assemblies. You would find that even in sound parts of the metal. It looks like you stopped in a good place. Knowing where to stop is a really good thing.
Mon Nov 22, 2021 9:49 pm

Addicted
Scattered remnants of 1974 Rally
Joined: 30 Jul 2009
Posts: 837
Location: San Francisco, CA
 
Addicted
Scattered remnants of 1974 Rally
Joined: 30 Jul 2009
Posts: 837
Location: San Francisco, CA
Mon Nov 22, 2021 9:49 pm linkquote
Thanks for the responses!

To lap the cylinder head – I would turn it? Maybe on a flat surface on 600 (or higher?) grit sandpaper? Like lapping valves?

The metal looks not bad! There is some surface rust between the sheets of metal going back further, but it's very light. I was thinking I would just remove the areas where the rust was expanding between the metal.

The bike was outside for decades, and the seat wore away. I think the areas with the worst rust was from water getting in to the air intake under the seat, and seeping down. And worst where it was more horizontal. Just the areas I cut out.

If I leave the areas that haven't expanded, are they pretty safe from continuing to rust?


the plastic cover was in there, so the water drained out along the seam of the frame channel.

Mon Nov 22, 2021 9:51 pm

Addicted
Scattered remnants of 1974 Rally
Joined: 30 Jul 2009
Posts: 837
Location: San Francisco, CA
 
Addicted
Scattered remnants of 1974 Rally
Joined: 30 Jul 2009
Posts: 837
Location: San Francisco, CA
Mon Nov 22, 2021 9:51 pm linkquote
One more.

Is this a decent cylinder kit?

I had wanted to use an original Piaggio 200 one, but they're out of stock at Scooterwest. But this one is available.



Wed Nov 24, 2021 10:57 pm

Addicted
Scattered remnants of 1974 Rally
Joined: 30 Jul 2009
Posts: 837
Location: San Francisco, CA
 
Addicted
Scattered remnants of 1974 Rally
Joined: 30 Jul 2009
Posts: 837
Location: San Francisco, CA
Wed Nov 24, 2021 10:57 pm linkquote
Coming along. Slowly.


Tape. I might go slightly higher than this.




This worked. I gouged the frame a bit. :(


Other side. This took hours!!


Bye floorboard.


Cutting this out to make the spot welds easier to remove.


It's not SO bad. But the area where the floorboard meets the frame is gross. I hope it's ok underneath.




These spot welds take forever to remove.


This piece looks like it will work! The seam is a bit wider. I don't know how I'll blend those.


I can go a bit higher. This piece isn't exactly like the original frame, but it's still saving a frame that would probably have been trash. And will be all repaired soundly.


Almost ready to blast.

Wed Nov 24, 2021 11:10 pm

Addicted
Scattered remnants of 1974 Rally
Joined: 30 Jul 2009
Posts: 837
Location: San Francisco, CA
 
Addicted
Scattered remnants of 1974 Rally
Joined: 30 Jul 2009
Posts: 837
Location: San Francisco, CA
Wed Nov 24, 2021 11:10 pm linkquote
Still thinking about color.


This is what it looked like new. And I'm keeping it all original, with the American pieces.


This is what most Rallys in California looked like. I guess common, but I haven't seen one like this in good shape in ages.


This green is so pretty. It wasn't a Rally color. But I think it's the same green that Primaveras had in 1974. 305 Verde Ascot (Ascot Green). I love this color.

Wed Dec 01, 2021 11:13 pm

Addicted
Scattered remnants of 1974 Rally
Joined: 30 Jul 2009
Posts: 837
Location: San Francisco, CA
 
Addicted
Scattered remnants of 1974 Rally
Joined: 30 Jul 2009
Posts: 837
Location: San Francisco, CA
Wed Dec 01, 2021 11:13 pm linkquote
The floorboard.

The scale goes up far. But the rust isn't that bad. There's a lot of volume, but it hasn't eaten away so much of the frame.

Almost ready to blast. And I think I might take to a welding shop. I got a recommendation.

Welding sounds fun, but I'm not confident I'd do a good job my first time.


Today's focus.


Drilled out the spot welds, but then the flap disc was really the hero here.


scaliness. Everywhere.




:(


The lower part of the reinforcement place is really bad.


And ... gone! I'm not sure if I should go higher.


After some clean up.


There are a couple of spots where the frame is rotted, but this is the worst.


Should I go higher? These spot welds are puffy, but not really bad.


The floorboard has space.



Thu Dec 02, 2021 6:39 am

Not So Moderator
VNB VSC VBC VSX*2
Joined: 28 May 2008
Posts: 5439
Location: Hustletown, TX
 
Not So Moderator
VNB VSC VBC VSX*2
Joined: 28 May 2008
Posts: 5439
Location: Hustletown, TX
Thu Dec 02, 2021 6:39 am linkquote
I cant comment to on going higher... would be good to treat as much of that rust as you can, but I'd be worried about running out of real estate.

Your documenting of this has been super impressive! Keep it up and thanks.
Thu Dec 02, 2021 6:44 am

Molto Verboso
Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E
Joined: 16 Apr 2011
Posts: 1921
Location: Siam
 
Molto Verboso
Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E
Joined: 16 Apr 2011
Posts: 1921
Location: Siam
Thu Dec 02, 2021 6:44 am linkquote
It looks fine. Keep going. Hiring a person to weld is cool. I even have a welder, and I'm too damn lazy to get everything out to do stuff.

The Apocalypse is upon us, so get it going and cruise it down the highway as long as you can. I'm riding all my bikes much more. I think they love me much more now too, gash darn it.
Thu Dec 02, 2021 11:13 am

Addicted
Scattered remnants of 1974 Rally
Joined: 30 Jul 2009
Posts: 837
Location: San Francisco, CA
 
Addicted
Scattered remnants of 1974 Rally
Joined: 30 Jul 2009
Posts: 837
Location: San Francisco, CA
Thu Dec 02, 2021 11:13 am linkquote
Birdsnest wrote:
I cant comment to on going higher... would be good to treat as much of that rust as you can, but I'd be worried about running out of real estate.

Your documenting of this has been super impressive! Keep it up and thanks.
Thanks!

I'm regretting not getting the Grabor one. Considering it, but it takes weeks to arrive. I chose this shorter one, bc it was smaller to ship, and had the struts.

But it's the whole thing, so can go higher.

The bike must have been submerged in water a some point? How does that rust form?




This seemed ok in the higher part, but there was bondo over the sport welds higher.


This seems like it would be complicated, bc there's a backing plate, and this is where the metal attaches


This too. bc it can't cut out the whole backing plate. It goes all the way up.


This part was definitely worse.


There is some here. But it's not pushing out so much. I wonder if it will her worse over time.

Thu Dec 02, 2021 10:55 pm

Addicted
Scattered remnants of 1974 Rally
Joined: 30 Jul 2009
Posts: 837
Location: San Francisco, CA
 
Addicted
Scattered remnants of 1974 Rally
Joined: 30 Jul 2009
Posts: 837
Location: San Francisco, CA
Thu Dec 02, 2021 10:55 pm linkquote
Welding. Hard.

I got the materials to weld, and did a test with stitch and plug welds.

It's really hard! I didn't take enough photos.

I think I'll take to a welder, but I hope they do an ok job. I can drill all the holes for the plug welds.


Test subjects.




Oh no! I didn't get one of the welds. But they were pretty rough. This is after grinding.


Front.


Back.

The butt weld did not seal up. You can see the sheets are still separate.

Sat Dec 04, 2021 1:35 pm

Addicted
Scattered remnants of 1974 Rally
Joined: 30 Jul 2009
Posts: 837
Location: San Francisco, CA
 
Addicted
Scattered remnants of 1974 Rally
Joined: 30 Jul 2009
Posts: 837
Location: San Francisco, CA
Sat Dec 04, 2021 1:35 pm linkquote
Learn something new each day.

I guess I need these for the seam. If the metal is too close, it expands and warps, and you need a bit of space to fill in with the weld.

Still on the fence about trying this. I will practice a day or two more.

This project is taking forever.



Sat Dec 04, 2021 2:03 pm

Hooked
1959 Allstate w PX Engine
Joined: 29 Nov 2020
Posts: 382
Location: Los Angeles
 
Hooked
1959 Allstate w PX Engine
Joined: 29 Nov 2020
Posts: 382
Location: Los Angeles
Sat Dec 04, 2021 2:03 pm linkquote
You're going at 'em too hard. Just do little baby tacks here and there until it's filled up.

I posted this video on another thread. If you have 40 min to kill you'll get a lot better idea of what that thin sheet metal takes:

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