1974 Vespa 90 Build
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Member
2 Vespa 90 V9A1T US Model's
Joined: 05 Sep 2019
Posts: 41
Location: Brooklyn, New York
Thu Sep 05, 2019 10:46 am quote
Picked this V9A1T up for about the price all those hipsters are spending on a pair of white wireless earbuds.
My plan since this has a rattle-can'd paint job and some rust...is to tune it up a little. Not going for a true orig style resto. We have a 25mph speed limit on most streets here in NYC, so I need to figure out some low-end gearing improvements. Paint needs to be something bright (not red) so I'm visible to all the people driving/texting...street crossing/graming. Thinking Polini 130 or DR? Banana pipe possibly, or cut out the battery tray and do something bigger. New wiring, lots of new small stuff. Will be welding up some rust spots and the holes for the turn signals on the frame.

lmk if you have any suggestions or ideas






IMG_2060 by Ben, on Flickr
IMG_2061 by Ben, on Flickr
IMG_2065 by Ben, on Flickr
IMG_2064 by Ben, on Flickr
IMG_2071 by Ben, on Flickr
IMG_2067 by Ben, on Flickr
IMG_2078 by Ben, on Flickr



Did a little hammer work on the body some sanding..Think I will invest in some paint stripper next:




IMG_2196 by Ben, on Flickr
IMG_2202 by Ben, on Flickr
IMG_2203 by Ben, on Flickr
IMG_2206 by Ben, on Flickr
IMG_2209 by Ben, on Flickr
IMG_2207 by Ben, on Flickr



Last image shows the main problem spot, I've heard of some using an old front fender to weld in here..anyone have experience with that or seen it done?



IMG_2201 by Ben, on Flickr
Member
2 Vespa 90 V9A1T US Model's
Joined: 05 Sep 2019
Posts: 41
Location: Brooklyn, New York
Thu Sep 05, 2019 10:55 am quote
Has anyone tried these handlebar indicators? Pretty compact


Screen Shot 2019-09-05 at 2.52.09 PM.png

Member
GS/PX150/P200/VBA/90/Li150s1
Joined: 11 Jun 2019
Posts: 6
Location: Squamish
Thu Sep 05, 2019 1:55 pm quote
The paint after your sanding, looks awesome! Just clearcoat it as is!!
Member
2 Vespa 90 V9A1T US Model's
Joined: 05 Sep 2019
Posts: 41
Location: Brooklyn, New York
Thu Sep 05, 2019 2:04 pm quote
Squamishscooter wrote:
The paint after your sanding, looks awesome! Just clearcoat it as is!!
Thanks Mate! Would be pretty unique that way. Really want to deal with that rust once and for all so it doesn't resurface @ a later date. Also need some paint to make myself visible in traffic here.
Cheers!
Ossessionato
2015 GTS300, 1974 Primavera, 04 Ninja 250
Joined: 04 Apr 2013
Posts: 4286
Location: San Diego, CA
Thu Sep 05, 2019 2:20 pm quote
if you want to jazz up that speedo, speedo king can get you a new lens and backing plate. the originals are way better than the repops. he can also fix anything wrong with it if need be.

http://speedoking.com/
Ossessionato
2015 GTS300, 1974 Primavera, 04 Ninja 250
Joined: 04 Apr 2013
Posts: 4286
Location: San Diego, CA
Thu Sep 05, 2019 2:21 pm quote
what color are you thinking?

when you do your rebuild, I strongly recommend the DRT short 4th tree, the stock 4th gear is too far away from 3rd. Polini 130 is a good choice.
Style Maven
74 50s x3 78 P200 84 Cosa 58 AllState 68 Sprint 80 50special '66(?) Super125 + projects
Joined: 22 Nov 2010
Posts: 7606
Location: seattle/athens
Thu Sep 05, 2019 2:31 pm quote
Paint it some other year, that thing looks delicious to me, just the right amount of confusion. Use Ospho or similar to handle the rust, then skip the clearcoat & just wax it. You already know how easy it is to disassemble, paint it later & focus your dough on motor & running gear for now. Paint it when it's mechanically 100%, there's nothing else to fix & you're bored with that special unique look you got now. My tuppence.
Member
2 Vespa 90 V9A1T US Model's
Joined: 05 Sep 2019
Posts: 41
Location: Brooklyn, New York
Thu Sep 05, 2019 2:53 pm quote
sdjohn wrote:
if you want to jazz up that speedo, speedo king can get you a new lens and backing plate. the originals are way better than the repops. he can also fix anything wrong with it if need be.

http://speedoking.com/
Thanks for the link and good info, was going to get a new lens gasket for sure, see how that looks, backing plate is a little faded, but gives it some character I suppose..
Member
2 Vespa 90 V9A1T US Model's
Joined: 05 Sep 2019
Posts: 41
Location: Brooklyn, New York
Thu Sep 05, 2019 3:02 pm quote
sdjohn wrote:
what color are you thinking?

when you do your rebuild, I strongly recommend the DRT short 4th tree, the stock 4th gear is too far away from 3rd. Polini 130 is a good choice.
Color ideas:
IMG_2449 by Ben, on Flickr
IMG_2447 by Ben, on Flickr
IMG_2109 by Ben, on Flickr
IMG_2108 by Ben, on Flickr
IMG_2107 by Ben, on Flickr
IMG_2106 by Ben, on Flickr
IMG_2105 by Ben, on Flickr

I like the frame color contrasted by black components.

I will look into the DRT short 4th tree, what do you think for a pipe to compliment the polini 130? ideally would be nice not having to cut the battery box out.
Member
2 Vespa 90 V9A1T US Model's
Joined: 05 Sep 2019
Posts: 41
Location: Brooklyn, New York
Thu Sep 05, 2019 3:16 pm quote
V oodoo wrote:
Paint it some other year, that thing looks delicious to me, just the right amount of confusion. Use Ospho or similar to handle the rust, then skip the clearcoat & just wax it. You already know how easy it is to disassemble, paint it later & focus your dough on motor & running gear for now. Paint it when it's mechanically 100%, there's nothing else to fix & you're bored with that special unique look you got now. My tuppence.
I hear ya, The tuning is more important. Thanks for the tips on rust control, will look into that. Just need to decide on a pipe/gearing/cdi/and all the small bits. Get it mechanically where I want it then do the paint.
Ossessionato
2015 GTS300, 1974 Primavera, 04 Ninja 250
Joined: 04 Apr 2013
Posts: 4286
Location: San Diego, CA
Fri Sep 06, 2019 11:07 am quote
I like the ochre one, it's almost the Serveta Jet200 color.
Molto Verboso
08 GTS 250, 79 P200E, 62 Allstate
Joined: 11 Jan 2006
Posts: 1418
Location: Florence, OR
Sat Sep 07, 2019 9:02 am quote
I'm with you on that SDJohn. One of my favorite all time colors in on the Serveta, that burnt orange or ocra. The Gaillo Positano 902 is close...

Giallo Positano 902.jpg

Member
2 Vespa 90 V9A1T US Model's
Joined: 05 Sep 2019
Posts: 41
Location: Brooklyn, New York
Sat Sep 07, 2019 12:52 pm quote
qascooter wrote:
I'm with you on that SDJohn. One of my favorite all time colors in on the Serveta, that burnt orange or ocra. The Gaillo Positano 902 is close...
Yes I really like this color too, probably more appropriate for the bike's vintage
Thanks for sharing
Member
2 Vespa 90 V9A1T US Model's
Joined: 05 Sep 2019
Posts: 41
Location: Brooklyn, New York
Tue Sep 24, 2019 7:36 am quote
Updates and Gearing Questions
The gears look pretty good inside engine (Bike had 900 miles on it). Piston was seized and required come convincing

Planning on a Polini 130 kit.

I Want increased performance for around the city, don't need a high top speed. Looking for for low/mid increases.

My first vespa engine rebuild and have several questions related to gearing and such

-Can I just leave it stock 3 speed, and add polini crank, bearings, seals, reinforced clutch plates/springs, polini 130 kit, polini snail (or sip road), 19/19 carb

- Or is 4 speed the only way to go with a 130cc kit?

-Considered this sip performance kit: (Not sure I need the extra gearing
thou)
https://www.sipscootershop.com/en/products/tuning+kit+polini+road+130+cc+_10401000

-I also have a pk50 engine case that has case damage, Could I just swap the 4 speed gearing out into my v90?





Cleaned up the head a bit, might use this on my 2nd v90 build

Ossessionato
2015 GTS300, 1974 Primavera, 04 Ninja 250
Joined: 04 Apr 2013
Posts: 4286
Location: San Diego, CA
Tue Sep 24, 2019 7:51 am quote
https://drive.google.com/file/d/0Bw_22VX1GciRYWNFRHpqZUptc1U/view?usp=sharing

https://drive.google.com/file/d/0Bw_22VX1GciRYjhINmVQY1laWlk/view?usp=sharing

Here is some background for you on the gearbox stuff. Yes, you can run a 3 speed, but you probably don't want to. It's better to have at it now. This is an old discussion thread from another forum, immortalized as a PDF. It contains a bunch of good advice from Rob Hodge.
Hooked
1964 GS160, 1966 90ss, 1976 Sprint Veloce
Joined: 08 Sep 2011
Posts: 274

Tue Sep 24, 2019 7:56 am quote
90ss stamped head. That's pretty cool.
Member
2 Vespa 90 V9A1T US Model's
Joined: 05 Sep 2019
Posts: 41
Location: Brooklyn, New York
Wed Oct 16, 2019 3:07 pm quote
I split the case, degreased & cleaned with a brass brush. My plan is: to do all new bearing/seals/bushings/circlips and install a racing crank and a Polini 130 kit. Prob match case and ports. Doing my research on gearing now.




Member
Vespa Cosa 200 1994
Joined: 01 Oct 2019
Posts: 21
Location: Czech Republic
Thu Oct 17, 2019 7:27 am quote
Nice photos
These black & white pics are dope!
Member
Vespa P125X, Stella 2T
Joined: 15 Jul 2019
Posts: 16
Location: Pocatello ID
Thu Oct 17, 2019 7:41 am quote
I really liked the Green color as a choice.
Member
2 Vespa 90 V9A1T US Model's
Joined: 05 Sep 2019
Posts: 41
Location: Brooklyn, New York
Fri Oct 18, 2019 1:59 pm quote
Re: Nice photos
bokeh wrote:
These black & white pics are dope!
Thanks man, Photographer is my day job
Member
2 Vespa 90 V9A1T US Model's
Joined: 05 Sep 2019
Posts: 41
Location: Brooklyn, New York
Fri Oct 18, 2019 2:00 pm quote
TromboneBob wrote:
I really liked the Green color as a choice.
Thanks, Yea I'm leaning towards that green color.
Member
2 Vespa 90 V9A1T US Model's
Joined: 05 Sep 2019
Posts: 41
Location: Brooklyn, New York
Fri Oct 18, 2019 2:02 pm quote
sdjohn wrote:
https://drive.google.com/file/d/0Bw_22VX1GciRYWNFRHpqZUptc1U/view?usp=sharing

https://drive.google.com/file/d/0Bw_22VX1GciRYjhINmVQY1laWlk/view?usp=sharing

Here is some background for you on the gearbox stuff. Yes, you can run a 3 speed, but you probably don't want to. It's better to have at it now. This is an old discussion thread from another forum, immortalized as a PDF. It contains a bunch of good advice from Rob Hodge.
Thanks sdjohn! Good info here
Ossessionato
2015 GTS300, 1974 Primavera, 04 Ninja 250
Joined: 04 Apr 2013
Posts: 4286
Location: San Diego, CA
Fri Oct 18, 2019 2:43 pm quote
You can never go wrong with advice from Rob Hodge.
Member
2 Vespa 90 V9A1T US Model's
Joined: 05 Sep 2019
Posts: 41
Location: Brooklyn, New York
Thu Dec 12, 2019 6:33 am quote
Primer
Black primer to prevent rust while I rebuild the engine:





New Polini 133cc vs old 90cc


bodgemaster
1963 GL, 1976 Super (x 2), 1974 Primavera (x 2), 2006 Fly 150
Joined: 26 Sep 2013
Posts: 5041
Location: So Cal
Thu Dec 12, 2019 4:03 pm quote
Member
2 Vespa 90 V9A1T US Model's
Joined: 05 Sep 2019
Posts: 41
Location: Brooklyn, New York
Thu Dec 12, 2019 5:54 pm quote
🖤
SoCalGuy wrote:
Black is a nice color right!
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