Modern Vespa : V90 chassis and ET3 engine

V90 chassis and ET3 engine

Nelluch125

Mon, 05 Dec 2022 18:12:49 +0000

details

Hooked

'81 Vespa P200e, '85 Vespa PX125e, 1985 T5

Joined: Fri, 12 Jun 2020 02:20:51 +0000
Posts: 325
Location: St. Catharines, Ontario

Nelluch125

Hooked

'81 Vespa P200e, '85 Vespa PX125e, 1985 T5

Joined: Fri, 12 Jun 2020 02:20:51 +0000
Posts: 325
Location: St. Catharines, Ontario

Mon, 05 Dec 2022 18:12:49 +0000 quote

Hey all,

Just debating with a friend about the specifics of an engine swap into a v90.

He states the 4 speed ET3 engine won't switch to 4 gear in a v90 chassis bc the shifter tube won't allow you to switch past 3rd gear.

I disagree but I really don't know for sure.

If I were to compete this engine swap, would I need to change the shifter tube from 3 to 4 speed as well?

Thanks for your input!

Birdsnest Mon, 05 Dec 2022 18:35:21 +0000 details Not So Moderator VNB VSC 09C VMA VSX - vbc vmb Joined: Wed, 28 May 2008 17:31:07 +0000 Posts: 7483 Location: Hustletown, TX
Birdsnest Not So Moderator VNB VSC 09C VMA VSX - vbc vmb Joined: Wed, 28 May 2008 17:31:07 +0000 Posts: 7483 Location: Hustletown, TX	Mon, 05 Dec 2022 18:35:21 +0000 quote Pretty sure-o your friend is wrong-o. Resisdent cool guy Poi Dog swapped a pv125 engine into his 90 frame/headset and it shifts to 4th with no issues at all. Shift tubes are the same to my knowledge. Only issue would be if it's a pre 66 90. But, that has to do with the engine spigot that goes through the frame, not the shifter.

OP Nelluch125 Mon, 05 Dec 2022 18:40:10 +0000 details Hooked '81 Vespa P200e, '85 Vespa PX125e, 1985 T5 Joined: Fri, 12 Jun 2020 02:20:51 +0000 Posts: 325 Location: St. Catharines, Ontario
OP Nelluch125 Hooked '81 Vespa P200e, '85 Vespa PX125e, 1985 T5 Joined: Fri, 12 Jun 2020 02:20:51 +0000 Posts: 325 Location: St. Catharines, Ontario	Mon, 05 Dec 2022 18:40:10 +0000 quote I figured as much! Thank you! Does anyone else have any references that verify this? Thanks so much.

FINYoshi Mon, 05 Dec 2022 19:59:19 +0000 details Addicted Parmakit Primavera -74, Polini Primavera -68, VR-One 228 150 Touring -59, VMC 177 Bajaj Chetak 125 -95 Joined: Thu, 23 Jun 2022 06:30:20 +0000 Posts: 536 Location: Finland
FINYoshi Addicted Parmakit Primavera -74, Polini Primavera -68, VR-One 228 150 Touring -59, VMC 177 Bajaj Chetak 125 -95 Joined: Thu, 23 Jun 2022 06:30:20 +0000 Posts: 536 Location: Finland	Mon, 05 Dec 2022 19:59:19 +0000 quote Friend of mine also has a 125 4-speed engine on his 90 frame so no issues there.

GickSpeed Mon, 05 Dec 2022 22:32:10 +0000 details Molto Verboso Joined: Thu, 03 Nov 2011 19:17:41 +0000 Posts: 1886 Location: Racing Capital of the World
GickSpeed Molto Verboso Joined: Thu, 03 Nov 2011 19:17:41 +0000 Posts: 1886 Location: Racing Capital of the World	Mon, 05 Dec 2022 22:32:10 +0000 quote The only issue you might have is trying to take out the spark plug.

greasy125 Tue, 06 Dec 2022 00:51:08 +0000 details Sergeant at Arms Weird 80's Vespas & Cool Vintage Lambrettas Joined: Fri, 21 Oct 2005 19:59:19 +0000 Posts: 14201 Location: The state of insanity, SoCal
greasy125 Sergeant at Arms Weird 80's Vespas & Cool Vintage Lambrettas Joined: Fri, 21 Oct 2005 19:59:19 +0000 Posts: 14201 Location: The state of insanity, SoCal	Tue, 06 Dec 2022 00:51:08 +0000 quote like others said, it'll fit. if it's early small door getting at the plug is a trick but doable. just paint an extra dot on the shifter tube. to note, you'll probably want to run new shifter cables-- at least inners when you do it.

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