Open Type Handlebars
Post Reply    Forum -> Not-So-Modern
Author Message
Enthusiast
1x VNA1T 1x VL3T 1x GS200
Joined: 16 Jun 2015
Posts: 82
Location: Brisbane, QLD
Wed Jun 05, 2019 12:56 am quote
Just starting a Sei Giorni project and am thinking about what sort of handlebar shift mechanism to use. I could go the way of original type bars but I'll be using a P2 motor and am not sure if the shifter will work with the 4spd gearbox... or go down the custom route... Has anyone done a similar conversion? Thoughts?

20190601_102409.jpg

Molto Verboso
Joined: 03 Nov 2011
Posts: 1030
Location: Racing Capital of the World
Wed Jun 05, 2019 2:12 am quote
why would the original handlebar shift mechanism not work?
Enthusiast
1x VNA1T 1x VL3T 1x GS200
Joined: 16 Jun 2015
Posts: 82
Location: Brisbane, QLD
Wed Jun 05, 2019 2:28 am quote
Not sure, that's why I'm asking. The original shifter mechanism was designed for a 3spd and the P range motor is a 4spd... maybe the shifter doesn't have enough throw for the 4spd??
Style Maven
74 50s x3 78 P200 84 Cosa PK50XL2 58 AllState 68 Sprint 80 50special '66(?) Super125
Joined: 22 Nov 2010
Posts: 7734
Location: seattle/athens
Wed Jun 05, 2019 5:45 am quote
Should be enough throw but you may need to tweak a bit to get enough at both ends. I put a GL150 motor in my VB1 and had to deal w/ the same situation. A friend sent me a headset that was all set up for the gearing upgrade, so looks to have been done before.


featuring 1,*, 2, 3 and 'FAST'
Addicted
bare metal cafe racer
Joined: 01 Sep 2017
Posts: 711
Location: Aotearoa (New Zealand)
Wed Jun 05, 2019 6:11 am quote
You need a ~45mm diameter pulley. I made a 42mm one for my VBB w/ p200 - only just have to rotate past the 4th mark. It will depend on the angle of turn the sei giorni gear select has. What’s the original setup you are working with - some pics of the headset and gear workings would help.
Addicted
bare metal cafe racer
Joined: 01 Sep 2017
Posts: 711
Location: Aotearoa (New Zealand)
Enthusiast
1x VNA1T 1x VL3T 1x GS200
Joined: 16 Jun 2015
Posts: 82
Location: Brisbane, QLD
Wed Jun 05, 2019 10:22 am quote
Thanks Pheas. There's nothing really there at the moment in terms of handlebars so it's really just figuring out what I want to work with. Of course, it'll just be going back to the P200 gear box selector.
Molto Verboso
Joined: 03 Nov 2011
Posts: 1030
Location: Racing Capital of the World
Wed Jun 05, 2019 12:41 pm quote
Stuarttiainen wrote:
Not sure, that's why I'm asking. The original shifter mechanism was designed for a 3spd and the P range motor is a 4spd... maybe the shifter doesn't have enough throw for the 4spd??
It will work.
Enthusiast
1x VNA1T 1x VL3T 1x GS200
Joined: 16 Jun 2015
Posts: 82
Location: Brisbane, QLD
Wed Jun 05, 2019 7:51 pm quote
Thanks Gick
Your Rally Here   vespa scooterwest scooter west Motorsport Scooters   Yelcome Leather Top Cases and Roll Bags for Piaggio Vespa PX LX LXV GTS GTV
Post Reply    Forum -> Not-So-Modern
[ Time: 0.2092s ][ Queries: 25 (0.0363s) ][ Debug on ]