Corsa seat gap. Fixes??
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Enthusiast
Owned Vespa Rally 200, V90, Li150 series II...now a PX200
Joined: 26 Jun 2018
Posts: 82
Location: Fukui, Japan From San Diego
Mon May 13, 2019 12:48 am quote
I love the look of the corsa seat. To my eyes the proportions of the slope and the body are perfect and the price is right compared to other slope back seat options out there.

The only thing I don't love is that gap.

I have one sitting on my PX right now. I've tried to go through older threads to see if there are any fixes. Only one I came across from Tierney, but he doesn't go through enough detail.

I don't need it to sit flush, but I'd like to close the gap a little. Without the seat pin it sits closer and is more acceptable. From what I can see the rear pin is the only thing holding up the seat.

Does anyone know if there is a shorter M8 seat seat pin? Currently using the one that comes with the sip rear adapter.

Another option that might help is if anyone knows of or knows someone who can fabricate another rear adapter plate?

The one that sip sent out is not great quality. I've already had someone cut of the things that stick out of the sides since I have the gas sensor and the little wing things were in the way. I also had to have the hole re-thread as it was to small.

Problem is that it's flat, so when it's mounted, it sits at a slant from the top of the gas tank to where the original seat pin would sit. That cause the seat pin to sit a little higher.

I was thinking of one that is stepped so that it sits flush to the body.

Any other ideas welcome.

Sip adapter


SoCalGuy's bike were you can really see the gap.


Tierney's bike with a more acceptable gap.
Style Maven
74 50s x3 78 P200 84 Cosa PK50XL2 58 AllState 68 Sprint 80 50special '66(?) Super125
Joined: 22 Nov 2010
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Location: seattle/athens
Mon May 13, 2019 1:15 am quote
I see what you mean. Do you have access to a big vise and large hammer? Time for some modest but forceful metal persuasion.

And yes, there are different length seat pins, look here: http://www.scootermercato.com/Home?search=seat+pin
Enthusiast
Owned Vespa Rally 200, V90, Li150 series II...now a PX200
Joined: 26 Jun 2018
Posts: 82
Location: Fukui, Japan From San Diego
Mon May 13, 2019 1:19 am quote
V oodoo wrote:
I see what you mean. Do you have access to a big vise and large hammer? Time for some modest but forceful metal persuasion.

And yes, there are different length seat pins, look here: http://www.scootermercato.com/Home?search=seat+pin
Not too many tools or even a garage for that matter. I have no objections to having to bend things, but I don't even know where to begin.

I think most of the shorter seat pins are M7 size and not M8?
bodgemaster
1963 GL, 1976 Super (x 2), 1974 Primavera (x 2), 2006 Fly 150
Joined: 26 Sep 2013
Posts: 5251
Location: So Cal
Mon May 13, 2019 7:37 am quote
Yeah the gap bugs me too, but the seat's comfy so I haven't messed with it.

It's not the rear pin causing the gap, it's the location of the hinge pin on the front mounting bracket. If it's moved about 1/2" closer to the seat, the whole seat will sit lower. The latch in the back has to be modified too. Doable with some drilling n grinding.

hinge.jpg

Enthusiast
Owned Vespa Rally 200, V90, Li150 series II...now a PX200
Joined: 26 Jun 2018
Posts: 82
Location: Fukui, Japan From San Diego
Mon May 13, 2019 4:13 pm quote
SoCalGuy wrote:
Yeah the gap bugs me too, but the seat's comfy so I haven't messed with it.

It's not the rear pin causing the gap, it's the location of the hinge pin on the front mounting bracket. If it's moved about 1/2" closer to the seat, the whole seat will sit lower. The latch in the back has to be modified too. Doable with some drilling n grinding.
I was thinking about that too. Guess I'll live with for a little bit since I don't have the proper resources.

Edit: Also I was thinking a shorter seat pin because I can't see any other place holding the rear up.
Hooked
Vespa P200E
Joined: 08 Aug 2007
Posts: 413
Location: Portland, Oregon
Thu May 16, 2019 6:28 am quote
Phangtonpower wrote:
Edit: Also I was thinking a shorter seat pin because I can't see any other place holding the rear up.
It's been many years since I had my P200E with this seat, but if my memory is right, a shorter seat pin won't help. The rear of the seat rests on two rubber feet that rest on the bracket, on the those two tabs sticking out at each side of the threaded seat pin hole.

The gap doesn't look all that bad from most angles, but lower would look nicer.
Perhaps one could use a short seat pin, and cut off the two tabs on the bracket, letting the rubber feet rest on the tank? Or maybe you can fit shorter rubber feet?

I do remember thinking that it's a pretty comfortable seat. Not squishy or springy, but by no means a plank with a little foam on it either. Ergonomically it put me in a posture that was just right for my taste.
Enthusiast
Vespa PX200
Joined: 11 Jun 2018
Posts: 75
Location: Wexford, Ireland
Wed May 22, 2019 1:36 am quote
mathias wrote:
Perhaps one could use a short seat pin, and cut off the two tabs on the bracket, letting the rubber feet rest on the tank? Or maybe you can fit shorter rubber feet?
I agree with the not so great looking "gap". Has anyone tried shorter rubber feet?
Style Maven
74 50s x3 78 P200 84 Cosa PK50XL2 58 AllState 68 Sprint 80 50special '66(?) Super125
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Wed May 22, 2019 1:47 am quote
stealth
Phangtonpower wrote:
V oodoo wrote:
I see what you mean. Do you have access to a big vise and large hammer? Time for some modest but forceful metal persuasion.

And yes, there are different length seat pins, look here: http://www.scootermercato.com/Home?search=seat+pin
Not too many tools or even a garage for that matter. I have no objections to having to bend things, but I don't even know where to begin.

I think most of the shorter seat pins are M7 size and not M8?
If you're short on tools and access to modifying the frame, how about gluing some black auto door weather stripping around the bottom, inset just inside the bottom edge? I think there's lots of variety available. Do a neat job and the seat should close snug with no visual gap. If you can get Shoe Goo there to glue it, it's tough enough to do the job and removable without a trace if you change your mind.
bodgemaster
1963 GL, 1976 Super (x 2), 1974 Primavera (x 2), 2006 Fly 150
Joined: 26 Sep 2013
Posts: 5251
Location: So Cal
Sun Jun 02, 2019 5:07 am quote
Spent some time in the garage yesterday lowering the seat.

First, I was wrong, hinge pin doesnít need to be relocated.

The problem is the cross piece in the back that holds the latch. It has a lip that has to be trimmed off. To do that, the lever has to be removed (itís riveted on) then reinstalled later with a bolt. The bottom of the seat then has to be hammered so it clears the top of the fuel lid. Finally, the ďearsĒ on the adapter that holds the pin have to be cut off so the rubber feet rest directly on the frame.

It took some work, but thereís almost no gap now.

B21B9BD9-BAA8-4A56-A8B4-BA6090AC2A2E.jpeg

Molto Verboso
08 GTS 250, 79 P200E, 62 Allstate
Joined: 11 Jan 2006
Posts: 1561
Location: Florence, OR
Sun Jun 02, 2019 8:28 am quote
Nice work - looks perfect!
Ossessionato
Joined: 26 Oct 2015
Posts: 2461

Sun Jun 02, 2019 8:48 am quote
Looks super clean. Nice work Guy!
Enthusiast
Owned Vespa Rally 200, V90, Li150 series II...now a PX200
Joined: 26 Jun 2018
Posts: 82
Location: Fukui, Japan From San Diego
Mon Jun 03, 2019 8:10 am quote
SoCalGuy wrote:
Spent some time in the garage yesterday lowering the seat.

First, I was wrong, hinge pin doesnít need to be relocated.

The problem is the cross piece in the back that holds the latch. It has a lip that has to be trimmed off. To do that, the lever has to be removed (itís riveted on) then reinstalled later with a bolt. The bottom of the seat then has to be hammered so it clears the top of the fuel lid. Finally, the ďearsĒ on the adapter that holds the pin have to be cut off so the rubber feet rest directly on the frame.

It took some work, but thereís almost no gap now.
Man I just had the hinge lowered!! I also ordered a shorter seat pin, so I was gonna wait to post pictures.

It does sit lower, but there is still the gap in the back. for shits and giggles, I had the seat sitting on frame without the front hinge and the seat pin off, it still had a noticeable gap.

Can you share pictures of under the seat. I'd love to see where you trimmed the latch hole and where you hammered the area for the gas cap.
bodgemaster
1963 GL, 1976 Super (x 2), 1974 Primavera (x 2), 2006 Fly 150
Joined: 26 Sep 2013
Posts: 5251
Location: So Cal
Mon Jun 03, 2019 2:04 pm quote
Pm me Iíll walk u thru it.
Addicted
'64 Motovespa 150S (177) , '64 V90
Joined: 27 Mar 2013
Posts: 610
Location: S.Salem, NY
Mon Jun 03, 2019 4:04 pm quote
The pin holds the seat down, not up. If it's too short, it will not catch the latch.
Enthusiast
Owned Vespa Rally 200, V90, Li150 series II...now a PX200
Joined: 26 Jun 2018
Posts: 82
Location: Fukui, Japan From San Diego
Mon Jun 03, 2019 4:14 pm quote
mathias wrote:
Phangtonpower wrote:
Edit: Also I was thinking a shorter seat pin because I can't see any other place holding the rear up.
It's been many years since I had my P200E with this seat, but if my memory is right, a shorter seat pin won't help. The rear of the seat rests on two rubber feet that rest on the bracket, on the those two tabs sticking out at each side of the threaded seat pin hole.

The gap doesn't look all that bad from most angles, but lower would look nicer.
Perhaps one could use a short seat pin, and cut off the two tabs on the bracket, letting the rubber feet rest on the tank? Or maybe you can fit shorter rubber feet?

I do remember thinking that it's a pretty comfortable seat. Not squishy or springy, but by no means a plank with a little foam on it either. Ergonomically it put me in a posture that was just right for my taste.
The tabs were the first thing cut off as they are in the way for the sensor. I also had to remove the rubber foot on that side as it hit the sensor. The other rubber foot doesn't even touch the frame, so that's why I was thinking a shorter seat pin.

I had the hinge lowered about 13mm and that helped and waiting on the seat pin to see if that will do anything. In the mean time I'm gonna PM SoCal to see what he did.
Enthusiast
Owned Vespa Rally 200, V90, Li150 series II...now a PX200
Joined: 26 Jun 2018
Posts: 82
Location: Fukui, Japan From San Diego
Mon Jun 03, 2019 4:16 pm quote
Moto64 wrote:
The pin holds the seat down, not up. If it's too short, it will not catch the latch.
Your probably right. Ordered one anyway. Cheap enough to experiment with though.
bodgemaster
1963 GL, 1976 Super (x 2), 1974 Primavera (x 2), 2006 Fly 150
Joined: 26 Sep 2013
Posts: 5251
Location: So Cal
Mon Jun 03, 2019 5:43 pm quote
If your seatís like the one I have, you donít need a shorter pin.
Enthusiast
Owned Vespa Rally 200, V90, Li150 series II...now a PX200
Joined: 26 Jun 2018
Posts: 82
Location: Fukui, Japan From San Diego
Mon Jun 03, 2019 9:54 pm quote
This is what I have done so far.

IMG_4753.JPG

IMG_4755.JPG
You can see the rubber foot doesn't touch the frame.

IMG_4756.JPG
Repositioned hinge.

IMG_4757.JPG
And rear seat pin adapter.

Enthusiast
Owned Vespa Rally 200, V90, Li150 series II...now a PX200
Joined: 26 Jun 2018
Posts: 82
Location: Fukui, Japan From San Diego
Tue Jun 04, 2019 7:11 am quote
Moto64 wrote:
The pin holds the seat down, not up. If it's too short, it will not catch the latch.
Just checked with the seat pin off. It definitely rides a lot lower.

When is say shorter seat pin, I mean this.

VESPA-PX-PE-P200E-T5-PX125-PX150-M8.jpg

download.jpg
Vs this. SIP ships with one similar that is already cut to where it only has 2 or 3 threads and it bottoms out. I just have to cut the threads the right height on the shorter one. I have more room to play with. It will still probably be a few threads hol

Enthusiast
Owned Vespa Rally 200, V90, Li150 series II...now a PX200
Joined: 26 Jun 2018
Posts: 82
Location: Fukui, Japan From San Diego
Sat Aug 03, 2019 11:22 pm quote
Well I got it as low as it will go. After waiting almost 2 months for a seat pin from India, it never came, so found a one locally. I used one for a small frame that has a shorter base. The threading is a size smaller, so I found thin M7 nuts similar to the ones used for potentiometer and plug jacks for guitar to secure it to the base plate. I was able to cut it 5mm shorter than the pin that came with the seat. Can't really tell, but it sits as low as it does without the seat pin.

Before

IMG_4753.JPG

IMG_4766.JPG
After

Hooked
1974 Vespa 125 Primavera, 1980 Bajaj Chetak, 1962 Lambretta 175TV3, 2006 Yamaha Vino
Joined: 07 Jul 2017
Posts: 496
Location: Boston, MA
Thu Apr 30, 2020 1:03 pm quote
I also have this issue on my Bajaj Chetak. Unfortunately, the biggest offender seems to be clearance for the gas cap. Anyone have any experience adapting a different model of Smallframe seat hinge to work with a largeframe?
bodgemaster
1963 GL, 1976 Super (x 2), 1974 Primavera (x 2), 2006 Fly 150
Joined: 26 Sep 2013
Posts: 5251
Location: So Cal
Fri May 01, 2020 11:05 am quote
Got mine to sit lower with a little pounding where the metal pan hits the fuel tank lid.

BD1BF183-1FE9-45C3-8D71-118D61710AF6.jpeg

Hooked
1974 Vespa 125 Primavera, 1980 Bajaj Chetak, 1962 Lambretta 175TV3, 2006 Yamaha Vino
Joined: 07 Jul 2017
Posts: 496
Location: Boston, MA
Mon May 04, 2020 1:18 pm quote
SoCalGuy, thanks! We did do that over the weekend It's still sitting a bit high and as you noted in a previous post, it seems there is an issue with the cross bar that the latch is attached to. Can you show me which area you're talking about that needs to be trimmed? Right now, the rubber feet aren't even reaching the latch plate.
bodgemaster
1963 GL, 1976 Super (x 2), 1974 Primavera (x 2), 2006 Fly 150
Joined: 26 Sep 2013
Posts: 5251
Location: So Cal
Mon May 04, 2020 8:25 pm quote
The part I ground off is the piece the lever fits through.

As for hammering, if you look under the seat, thereís a little notch where the seat clears the fuel lid. Put the seat on the scoot without the hinge and youíll see/feel where it hits the lid. You have to hammer a kind of a convex curve there over the lid so it doesnít touch once itís lowered.

Good luck
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