Modern Vespa : big bore kit on gs160?

big bore kit on gs160?

OP daz scoot UTC details Lurker Joined: UTC Posts: 3
OP daz scoot Lurker Joined: UTC Posts: 3	UTC quote Can i fit a 166 malossi big bore kit or a dr180 big bore kit to a gs160 engine. Can i drill out and modify the casings to fit a conventional carb? Will it run????

cubastreet UTC details Hooked rollin on 8s Joined: UTC Posts: 283 Location: NZ
cubastreet Hooked rollin on 8s Joined: UTC Posts: 283 Location: NZ	UTC quote isn't a gs160 engine worth heaps more in it's original state?

OP daz scoot UTC details Lurker Joined: UTC Posts: 3
OP daz scoot Lurker Joined: UTC Posts: 3	UTC quote quite possibly but thats not what i asked

OP daz scoot UTC details Lurker Joined: UTC Posts: 3
OP daz scoot Lurker Joined: UTC Posts: 3	UTC quote i dont have a gs scoot just the engine parts and was trying to make something out of the parts i have. i dont the gs carb but do have a couple of kits and px carbs ect.

Speed_Kills

UTC

details

Addicted

Mostly Lambrettisti

Joined: UTC
Posts: 648
Location: SF, CA

Speed_Kills

Addicted

Mostly Lambrettisti

Joined: UTC
Posts: 648
Location: SF, CA

UTC quote

If you could find a GS carb (good luck) you could simply bore it out to 180 and use a SS180 piston + keep your crank.

Otherwise you could sell that GS case for decent money, make a profit, and get a different case that does not have hard to find replacement parts and to which you could fit one of the afore mentioned kits. All paid for.

Those are your logical options. Otherwise go harsh and fuck up that GS engine so that once you figure out it was all a waste of time and money, you are unable to sell the case for a fraction of what it is worth. Shit drop a reed in it. I'm a fan.

V oodoo

UTC

details

Style Maven

'74 50s x3 '87 PK125XL '92 PK50XL2 Plurimatic - & - '58 AllState '68 Sprint '66(?) 125 Super '72 DanMotor 150 Super and '04 Bajaj LML hybrid

Joined: UTC
Posts: 10025
Location: seattle/athens

V oodoo

Style Maven

'74 50s x3 '87 PK125XL '92 PK50XL2 Plurimatic - & - '58 AllState '68 Sprint '66(?) 125 Super '72 DanMotor 150 Super and '04 Bajaj LML hybrid

Joined: UTC
Posts: 10025
Location: seattle/athens

UTC quote

Where do you live? If not too much is missing, maybe you could trade what you have for something more like you want. Be a shame to hack a rare motor...

To answer your question, this motor is piston ported so probably not. I'm not positive, but I think your kits are made for rotary valve motors only.

Yeah, you should be able to mount an alternate carb, but hopefully using a bolt on solution of some kind.

Here's more about your motor:

Quote:

The motor on the G.S. 160 was totally new. It seems as though it is a hybrid of the piston-ported motor on the G.S. 150 and the two-piece case design of the Vespa 150. The piston-ported induction style of the G.S. 150 was retained; however it was improved in several ways.

The crankshaft was upgraded and the bearings were enlarged. The size of the clutch and the cush-drive mechanism was increased. In terms of the cases, they were altered to make them similar to those on the Vespa 150. The separate swing arm on the G.S. 150 was deleted, and the motor on the 160 was of a two-piece design with an integrated swing-arm. Essentially all internal parts on the motor were totally new, and almost no parts were shared with either the previous G.S. 150 or the contemporaneous Vespa 125 or 150. The piston-port design necessitated a 5% oil mixture, slightly less than the 6% required on the G.S. 150. The motor put out 8.9 HP at 6500 RPM.

Killo UTC details Ossessionato I have a few scooters.... Joined: UTC Posts: 2229 Location: San Antonio, TX
Killo Ossessionato I have a few scooters.... Joined: UTC Posts: 2229 Location: San Antonio, TX	UTC quote The short answer is no. The GS160 is a piston ported engine. The kits you mentioned are for rotary valve engines.

Nyle UTC details Addicted Joined: UTC Posts: 985 Location: Orange County
Nyle Addicted Joined: UTC Posts: 985 Location: Orange County	UTC quote NO! NO! If you can get 180 barrel, you can bore it out to fit a P200 piston (with the top hole welded up on the piston). As far as the carb the stock 27mm carb works fine.

Killo UTC details Ossessionato I have a few scooters.... Joined: UTC Posts: 2229 Location: San Antonio, TX
Killo Ossessionato I have a few scooters.... Joined: UTC Posts: 2229 Location: San Antonio, TX	UTC quote Nyle wrote: NO! NO! If you can get 180 barrel, you can bore it out to fit a P200 piston (with the top hole welded up on the piston). As far as the carb the stock 27mm carb works fine. But again, it's got to be an SS180 barrel. Talk to Hot Rod Al. He built an over-bored jug for my SS180. He does great work.

cubastreet UTC details Hooked rollin on 8s Joined: UTC Posts: 283 Location: NZ
cubastreet Hooked rollin on 8s Joined: UTC Posts: 283 Location: NZ	UTC quote you could build it up if you have the money. if the spigot size is the same you could hack the case, stick a big reed on it and run a166 or 177. but you could probably find someone happy to swap you a whole working PX200 engine for what you've got.

jamesjohn

UTC

details

Ossessionato

1970 Vespa Rally 180

Joined: UTC
Posts: 4145
Location: Denton Tx.

jamesjohn

Ossessionato

1970 Vespa Rally 180

Joined: UTC
Posts: 4145
Location: Denton Tx.

UTC quote

cubastreet wrote:

you could build it up if you have the money. if the spigot size is the same you could hack the case, stick a big reed on it and run a166 or 177. but you could probably find someone happy to swap you a whole working PX200 engine for what you've got.

you could even swap that engine for a whole other running bike.

If I were you, you want more power, I would trade for a good rebuilt, running P200 engine and drop it right in that frame. do some electrical work, renew the brakes, and get a SIP speedo for headset. maybe repaint with a mild racer look and rock that shit. I would like to see orange and white paint with SIP tubeless wheels and Michelin S1's and paint the letters. lol

nomadinsiam

UTC

details

Ossessionato

Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E

Joined: UTC
Posts: 2561
Location: Siam

nomadinsiam

Ossessionato

Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E

Joined: UTC
Posts: 2561
Location: Siam

UTC quote

Speed_Kills wrote:

If you could find a GS carb (good luck)

These carburetors aren't hard to find. They're frequently on eBay. They are quite expensive though.

Speed_Kills wrote:

Otherwise you could sell that GS case for decent money, make a profit, and get a different case that does not have hard to find replacement parts and to which you could fit one of the afore mentioned kits. All paid for.

Those are your logical options. Otherwise go harsh and fuck up that GS engine so that once you figure out it was all a waste of time and money, you are unable to sell the case for a fraction of what it is worth. Shit drop a reed in it. I'm a fan.

I agree with everything else. Overall, I'd say it's an unwise idea.

Speed_Kills UTC details Addicted Mostly Lambrettisti Joined: UTC Posts: 648 Location: SF, CA
Speed_Kills Addicted Mostly Lambrettisti Joined: UTC Posts: 648 Location: SF, CA	UTC quote nomadinsiam wrote: Speed_Kills wrote: If you could find a GS carb (good luck) These carburetors aren't hard to find. They're frequently on eBay. They are quite expensive though. I have not seen one in a while. If you see one let me know. I would love to have an extra.

nigelthefish UTC details Ossessionato ET2, PX150 Joined: UTC Posts: 3410 Location: Denver CO
nigelthefish Ossessionato ET2, PX150 Joined: UTC Posts: 3410 Location: Denver CO	UTC quote Your might be able to but my vote goes to sell it, toss a p200 (tune the shit out of it it you want) motor in it and sell the OG cases to someone who want them. So what you want it's your bike.

nomadinsiam

UTC

details

Ossessionato

Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E

Joined: UTC
Posts: 2561
Location: Siam

nomadinsiam

Ossessionato

Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E

Joined: UTC
Posts: 2561
Location: Siam

UTC quote

Speed_Kills wrote:

nomadinsiam wrote:

Speed_Kills wrote:

If you could find a GS carb (good luck)

These carburetors aren't hard to find. They're frequently on eBay. They are quite expensive though.

I have not seen one in a while. If you see one let me know. I would love to have an extra.

I've got an extra good one and an extra trashed one, but I won't let either go. Here are two on eBay Italy that are pretty expensive. Peter from Denmark (ricambiscooters) on eBay has them as well fairly often. He always starts the bidding at $0.99

http://www.ebay.it/itm/VESPA-GS-160-SS-180-CARBURATORE-ORIGINALE-OTTIMO-GETTI-SI-27-23-DELLORTO-/380549483341?pt=Ricambi_e_Accessori_Moto&hash=item589a844b4d

http://www.ebay.it/itm/VESPA-GS-160-SS-180-CARBURATORE-ORIGINALE-OTTIMO-GETTI-185-50-SI-27-23-DELLORTO-/380542420801?pt=Ricambi_e_Accessori_Moto&hash=item589a188741

Speed_Kills UTC details Addicted Mostly Lambrettisti Joined: UTC Posts: 648 Location: SF, CA
Speed_Kills Addicted Mostly Lambrettisti Joined: UTC Posts: 648 Location: SF, CA	UTC quote Ahh.... Italian Ebay. For some reason this does not come up on my searches, even if I select international. Thanks!

nomadinsiam UTC details Ossessionato Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E Joined: UTC Posts: 2561 Location: Siam
nomadinsiam Ossessionato Vespas 1964 GS160, 1965 SS180, 1977 V9A1T, 1983 PX150E Joined: UTC Posts: 2561 Location: Siam	UTC quote Yes. Italian eBay could be synonymous with the word gouge. One guy quoted me 100 euros to sent a fairly small plastic part that cost 10 euros. I told him he wasn't sending it to Mars. There are a few fair, honest vendors there.

Vader19

UTC

details

Mr. Clean

P,SUPER,V90, 50 Special

Joined: UTC
Posts: 10205
Location: This is't my locker!

RIP

Vader19

Mr. Clean

P,SUPER,V90, 50 Special

Joined: UTC
Posts: 10205
Location: This is't my locker!

UTC quote

For Godsake save the GS case for someone who needs it and find an old lml case or whathaveyou to "tune the shit out of" as our friend Fish so eloquently put it..

Having said that... it's a free country (at least last time I checked) and you're free to do whatever you want... however horrible and unconscionable... and if you want to race me through the hedge maze remember... the loser has to keep America clean!

mr10

UTC

details

Hooked

150 GLx, Rally 200

Joined: UTC
Posts: 256
Location: Netherlands

mr10

Hooked

150 GLx, Rally 200

Joined: UTC
Posts: 256
Location: Netherlands

UTC quote

It often helps to check multiple eBay's: .co.uk, .de, .it and even the obscure benl.ebay.be

With good communication international shipping is almost alway possible.

I've bought some stuff from ebay.it without trouble, but know that Vespa stuff in Italy is more expensive then anywhere else, due to rareness.

Speed_Kills: i've sold a couple GS/SS carbs not long ago I know who has 'em, but the guy's a pro - so price will be top of the market.

fastfrog UTC details Hooked PX125,200, T5, SS180,TS125 and some more... Joined: UTC Posts: 204 Location: Paris, Taxes!
fastfrog Hooked PX125,200, T5, SS180,TS125 and some more... Joined: UTC Posts: 204 Location: Paris, Taxes!	UTC quote Only solution to keep your top end and cases relatively free of tuning work is to fit a pinasco 225 double carb. Hard to find but lots of torque with its only 19mm carb breathing thru a flat reed system... I've done it on my SS engine 20 years ago... Pinasco's spigot is 1mm larger than your GS standard barrel. ⚠️ Last edited by fastfrog on UTC; edited 1 time

mr10 UTC details Hooked 150 GLx, Rally 200 Joined: UTC Posts: 256 Location: Netherlands
mr10 Hooked 150 GLx, Rally 200 Joined: UTC Posts: 256 Location: Netherlands	UTC quote Just missed one on ebay.de: http://www.ebay.de/itm/141139773376 Here's a pic of that kit:

fastfrog UTC details Hooked PX125,200, T5, SS180,TS125 and some more... Joined: UTC Posts: 204 Location: Paris, Taxes!
fastfrog Hooked PX125,200, T5, SS180,TS125 and some more... Joined: UTC Posts: 204 Location: Paris, Taxes!	UTC quote holy Grail!

Mattgyver UTC details Addicted 1974 Rally 200, 1974 Rally 200 with sidecar, Vespacross bike Joined: UTC Posts: 609 Location: Atlanta
Mattgyver Addicted 1974 Rally 200, 1974 Rally 200 with sidecar, Vespacross bike Joined: UTC Posts: 609 Location: Atlanta	UTC quote That Pinasco kit will involve some serious case work. That kit is the one that Pinasco has just re-released not to long ago. New Pinasco Kit Debut!

fastfrog UTC details Hooked PX125,200, T5, SS180,TS125 and some more... Joined: UTC Posts: 204 Location: Paris, Taxes!
fastfrog Hooked PX125,200, T5, SS180,TS125 and some more... Joined: UTC Posts: 204 Location: Paris, Taxes!	UTC quote Mattgyver wrote: That Pinasco kit will involve some serious case work. That kit is the one that Pinasco has just re-released not to long ago. New Pinasco Kit Debut! Not that much just a small case spingot reboring

Mattgyver UTC details Addicted 1974 Rally 200, 1974 Rally 200 with sidecar, Vespacross bike Joined: UTC Posts: 609 Location: Atlanta
Mattgyver Addicted 1974 Rally 200, 1974 Rally 200 with sidecar, Vespacross bike Joined: UTC Posts: 609 Location: Atlanta	UTC quote fastfrog wrote: Mattgyver wrote: That Pinasco kit will involve some serious case work. That kit is the one that Pinasco has just re-released not to long ago. New Pinasco Kit Debut! Not that much just a small case spingot reboring There's also no boost port on GS cases so it will need some welding to cut that port.

fastfrog UTC details Hooked PX125,200, T5, SS180,TS125 and some more... Joined: UTC Posts: 204 Location: Paris, Taxes!
fastfrog Hooked PX125,200, T5, SS180,TS125 and some more... Joined: UTC Posts: 204 Location: Paris, Taxes!	UTC quote boost ports are part of the reed block (see pic above). no real need of a grinding extravaganza....

Mattgyver UTC details Addicted 1974 Rally 200, 1974 Rally 200 with sidecar, Vespacross bike Joined: UTC Posts: 609 Location: Atlanta
Mattgyver Addicted 1974 Rally 200, 1974 Rally 200 with sidecar, Vespacross bike Joined: UTC Posts: 609 Location: Atlanta	UTC quote I know that but the cylinder is made to fit the cases of an engine with the third port so something will have to be done to fill that space, like putting a three port cylinder on a 2 port case, there will be a spot that have to be sealed where they don't match.

fastfrog UTC details Hooked PX125,200, T5, SS180,TS125 and some more... Joined: UTC Posts: 204 Location: Paris, Taxes!
fastfrog Hooked PX125,200, T5, SS180,TS125 and some more... Joined: UTC Posts: 204 Location: Paris, Taxes!	UTC quote to fill or empty that space? If you put it that way it will work fine inlet window has enough space ( rectangular form) to let fresh mixture to come in...

kyle.salter UTC details Hooked vespas, lambrettas, cushman, and mopeds Joined: UTC Posts: 387 Location: dallas, tx
kyle.salter Hooked vespas, lambrettas, cushman, and mopeds Joined: UTC Posts: 387 Location: dallas, tx	UTC quote ive had two customers that wanted more power out of there gs160's. so we didn't have two ruin there stock engine we swaped in rally 200 engines and turn out great. both of the stock engines are still perfect and cam be reinstalled back with no problems

oopsclunkthud UTC details Banned 3:5 Joined: UTC Posts: 9061 Location: San Francisco
oopsclunkthud Banned 3:5 Joined: UTC Posts: 9061 Location: San Francisco	UTC quote If I recall, one of the studs is slightly offset from the 200 as well.

fastfrog UTC details Hooked PX125,200, T5, SS180,TS125 and some more... Joined: UTC Posts: 204 Location: Paris, Taxes!
fastfrog Hooked PX125,200, T5, SS180,TS125 and some more... Joined: UTC Posts: 204 Location: Paris, Taxes!	UTC quote other (elegant) solution: find the power where it hides: o-tuning mon amour! new boost port big ports big carb 27/27 big sparks

Post Reply

Modern Vespa is the premier site for modern Vespa and Piaggio scooters. Vespa GTS300, GTS250, GTV, GT200, LX150, LXS, ET4, ET2, MP3, Fuoco, Elettrica and more.

Modern Vespa is made possible by our generous supporters.

Shop on Amazon with Modern Vespa

Modern Vespa is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com

[ Time: 0.0167s ][ Queries: 3 (0.0093s) ][ live ][ 334 ][ ThingOne ]