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Restoration of a GS 150

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puchfinnland Mike H
Deale, Maryland, USA   USA
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Greeting from Maryland

20 years ago I worked with Mark at Baltimore Vespa and Lambretta,
later he changed the name to www.motostrada.com
unfortunately a few years ago Mark closed shop.
I have restored several Vespas for Mark, and I desired to find and restore a GS 150.

My friend John Irvine found a GS in a local paper,

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On agreement He sold it to me as He knew I wanted to restore it, not Flip it.



Loaded up on my custom Vespa Hauler





Edited 1 time(s). Last edit at 2017-06-03 07:25 PM by puchfinnland.

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puchfinnland Mike H
Deale, Maryland, USA   USA
I previously purchased a basket case GS 150 which proved not worth restoring due to missing too many parts,

First thing was to break it down and take inventory of what I had, and what I needed.

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This was the pile of parts to go to the sandblaster
Note my restored SS 180, which I drove to Knoxville down skyline drive that same year.

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This was the collection of parts to be glass beaded and sent out for new cadmium plating,

puchfinnland Mike H
Deale, Maryland, USA   USA
I stripped down the engine and as the drain hole was stripped out I had the hole welded and drilled and tapped it to the correct size

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I now divided the restoration into 2 parallel projects.
1. body restoration
2. mechanical and trim

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My lifelong friend Jerry is a dedicated craftsman in metalworking, He also own a Vespa.

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The body was sanded and panels were straightened , much panel beating took place.

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Eventually it was ready for primer, Jerry only needed a skim coat of filler,

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puchfinnland Mike H
Deale, Maryland, USA   USA
the green was metal etch primer, After the body was straight Epoxy primer sealer was applied
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I used to work in a body shop years ago and have learned you should not rush it, I have seen so many jobs primed, sanded and painted shrink only a few weeks after delivery due to not curing fully during the process.

After sealed the vespa sat for weeks to cure.

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this was a interesting time in my life as I had the summer off between employment on Private Yachts.

It was also a fun time to just hang out with Jerry.

puchfinnland Mike H
Deale, Maryland, USA   USA
During the down time at the paint shop I was busy at Baltimore Vespa and Lambretta



My major obstacle was the crank shaft,
I bought the bike as-is and actually it did not even run.
After opening the case I saw the bearings spun in the case and the key way was completely shagged on the crank.
the case was no issue as I had a perfect case from my first 150 attempt,
but in 1997 a crank was unobtainable.

After several months and one empty paid promise from a now out of business supplier, a perfect crank with a bent rod was obtained.

The crank was sent to Kerry at http://vespamotorsport.com in San Diego.

Kerry modified and installed a new Piaggio P125 con rod and balanced the crank,
If you don't know GS 150 cranks have a bushing at the little end, P125 cranks have a bearing.
The little end of the crank was machined to improve lubrication to the bearing,
A fantastic improvement in reliability.

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Mark at Baltimore Vespa and Lambretta bought out a few dealers in PA and DEL, obtaining NOS parts and factory tools and like this early engine stand.
in out of business dealerships,

that said I was lucky to be able to replace EVERY bearing in the engine with new ones, including the very rare output shaft bearings.

A fresh bore and a new piston literally turned this into a new motor that is dead reliable.

puchfinnland Mike H
Deale, Maryland, USA   USA
not much to see in this image,
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Starting to assemble parts now that the hardware came back from the cad plating.

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The Speedo came apart, was rolled back to Zero and re assembled with a new bezel and trim ring, this was taken back in the days of film where a picture was hit or miss.

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the VESPA badge is soaking in paint stripper, getting prepared for refinishing

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The original legshields were made by ULMA, and the correct ones for GS150 are stamped 107

Legshield trim was and is still an issue, all bikes will fall on the engine side, so NOS engine side were unobtainable

the junk aftermarket legshields look cheap and rust almost the first day.

I was lucky in my travels to Sweden in obtaining a NOS glovebox side, Jerry took the engine side and panel beat and polished it to perfect condition.

puchfinnland Mike H
Deale, Maryland, USA   USA
Back at the body shop.....

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After several weeks of curing It was time for me to sand the body in preparation for paint.
I have seen so many times sand scratches showing thru metallic paint due to 400 grit paper being used.

I wet sanded the body with 800 grit which Jerry stated was over kill but after the final coat he was truly amazed in the quality and perfect depth of the finish

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While Jerry patiently waited I hung and prepared every component

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Jerry started with applying the base coat.


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puchfinnland Mike H
Deale, Maryland, USA   USA
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keeping the floor wet is the key to a dust free finish



the silver looks so good even without the clear




puchfinnland Mike H
Deale, Maryland, USA   USA
After almost a week to cure I was allowed to start assembly.

As before, I assembled the body trim at the body shop,

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Floor strips were properly buck riveted and with a cross hatch on the bottoms of the rivets.

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puchfinnland Mike H
Deale, Maryland, USA   USA
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The Time had come to leave Jerry's and bring the 2 projects together.

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puchfinnland Mike H
Deale, Maryland, USA   USA
The fork, hubs, and engine tins were sent out for powder coating,

As I had 2 forks one was the guide to re assemble the one that went on the bike.

the spring was cad plated along with all metal parts.




puchfinnland Mike H
Deale, Maryland, USA   USA
Normally the fork assembly and the engine get installed back to back as the they counterbalance each other.

I strap should be holding across the floor pan

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I did manage to find a NOS suspension pivot cover,

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And the engine goes in!!

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puchfinnland Mike H
Deale, Maryland, USA   USA
The rear shock was dis assembled and painted by Jerry and a new bushing pressed in.

There is ZERO spray can in this build.

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The days were getting long, over 14 hours a day in assembling it.

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puchfinnland Mike H
Deale, Maryland, USA   USA
All the correct wiring bullets war re attached.

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The day came when the bike is filled with Gas for the first time...

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puchfinnland Mike H
Deale, Maryland, USA   USA
I must thank Mark for the donation of the beautiful NOS tail lignt

This was taken just in the back of the shop in 97

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Here were my 2 together.

I had the luck to drive the GS home just 3 days prior to moving abroad, the SS was sold in 2002 and the GS lived under blankets in the air conditioned basement in my parents house.

I managed to put 400 miles on it in 20 years, Every visit came the ritual of filling it with gasoline, and then draining the tank, sight glass and carb before putting it back to sleep .


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