Modern Vespa : 200 gearing in a 125

200 gearing in a 125

OP MJRally UTC details Veni, Vidi, Posti 73 Rally, 76 ET3, 80 P200, 61 Ser 2, 65 Silver Special Joined: UTC Posts: 5348 Location: Oceanside, CA
OP MJRally Veni, Vidi, Posti 73 Rally, 76 ET3, 80 P200, 61 Ser 2, 65 Silver Special Joined: UTC Posts: 5348 Location: Oceanside, CA	UTC quote Just finished another locals scoot. Some older bolt on Polini kit with a Sito +. Dove in for a shift cross and all the gears looked suspect. Ordered new 125 gears and found out they were wrong (except first). Counted teeth and everything 200! I didn't think a 150 kit could pull 200 gears but I guess it can. Has anyone else seen this? Any not so obvious reason why?

mor_ UTC details Hooked 1974 v90, 1959 Allstate, 1979 p200 Joined: UTC Posts: 111 Location: Eugene, OR
mor_ Hooked 1974 v90, 1959 Allstate, 1979 p200 Joined: UTC Posts: 111 Location: Eugene, OR	UTC quote I heard the fireball stella came with 200 gears.

Jack221

UTC

details

Jet Eye Master

PX221 MHR heavily tuned, PX200 O tuned, PX181 M1XL tuned, PX166 tuned a bit and some motorbikes

Joined: UTC
Posts: 5140
Location: London UK

Jack221

Jet Eye Master

PX221 MHR heavily tuned, PX200 O tuned, PX181 M1XL tuned, PX166 tuned a bit and some motorbikes

Joined: UTC
Posts: 5140
Location: London UK

UTC quote

MJRally wrote:

Just finished another locals scoot. Some older bolt on Polini kit with a Sito +. Dove in for a shift cross and all the gears looked suspect. Ordered new 125 gears and found out they were wrong (except first). Counted teeth and everything 200! I didn't think a 150 kit could pull 200 gears but I guess it can.

Has anyone else seen this? Any not so obvious reason why?

Newer EFL gears are all the same. Just 4th is 35 or 36. This might be what you were looking at.

OP MJRally UTC details Veni, Vidi, Posti 73 Rally, 76 ET3, 80 P200, 61 Ser 2, 65 Silver Special Joined: UTC Posts: 5348 Location: Oceanside, CA
OP MJRally Veni, Vidi, Posti 73 Rally, 76 ET3, 80 P200, 61 Ser 2, 65 Silver Special Joined: UTC Posts: 5348 Location: Oceanside, CA	UTC quote mor_ wrote: I heard the fireball stella came with 200 gears. True! Forgot about that model.

OP MJRally UTC details Veni, Vidi, Posti 73 Rally, 76 ET3, 80 P200, 61 Ser 2, 65 Silver Special Joined: UTC Posts: 5348 Location: Oceanside, CA
OP MJRally Veni, Vidi, Posti 73 Rally, 76 ET3, 80 P200, 61 Ser 2, 65 Silver Special Joined: UTC Posts: 5348 Location: Oceanside, CA	UTC quote Jack221 wrote: Newer EFL gears are all the same. Just 4th is 35 or 36. This might be what you were looking at. 1980 American spec P125 model. Definitely old style, not EFL. Trying to figure out what the prior owner knew/ why the whole swap.

orwell84 UTC details Ossessionato Joined: UTC Posts: 3962 Location: northern New York
orwell84 Ossessionato Joined: UTC Posts: 3962 Location: northern New York	UTC quote Isn't it the gear on the primary that makes the ratio different between the 150 and 200?

MJRally

UTC

details

Veni, Vidi, Posti

73 Rally, 76 ET3, 80 P200, 61 Ser 2, 65 Silver Special

Joined: UTC
Posts: 5348
Location: Oceanside, CA

MJRally

Veni, Vidi, Posti

73 Rally, 76 ET3, 80 P200, 61 Ser 2, 65 Silver Special

Joined: UTC
Posts: 5348
Location: Oceanside, CA

UTC quote

orwell84 wrote:

Isn't it the gear on the primary that makes the ratio different between the 150 and 200?

Looking at the technica book for 1977-1980 models, P125s had 22/67 with 57, 54,48,44 tooth gears.

P200, 23/65, 57,42,38,35.

1981 on- Piaggio changed the P125 to 20/68, 58,42,38,36 and then doesn't show anything else regarding gears on any of the future models.

I'll have to steal this guys kitted 125 and do some speed tests with it. See how it stacks up to a P200. Might be fun for a future build since I have more P200 gears lying around than 125.

SubEtherBASS UTC details Veni, Vidi, Posti 1997 Italjet Formula 125, 2 matching N.Z. '69 VBC Super, 177cc Racer, VespaCross Bodge, Puch SRA150, Piaggio Zip 100! & others Joined: UTC Posts: 5095 Location: Australa, Mate
SubEtherBASS Veni, Vidi, Posti 1997 Italjet Formula 125, 2 matching N.Z. '69 VBC Super, 177cc Racer, VespaCross Bodge, Puch SRA150, Piaggio Zip 100! & others Joined: UTC Posts: 5095 Location: Australa, Mate	UTC quote Speedy (VBC1) has a PX-EFL gearbox, with long primary, standard 1st, long 2nd, standard 3rd & very short 4th... on 8"

orwell84 UTC details Ossessionato Joined: UTC Posts: 3962 Location: northern New York
orwell84 Ossessionato Joined: UTC Posts: 3962 Location: northern New York	UTC quote SubEtherBASS wrote: Speedy (VBC1) has a PX-EFL gearbox, with long primary, standard 1st, long 2nd, standard 3rd & very short 4th... on 8" I remember reading your speedy threads. They were very encouraging to read after being told that 8" scooters weren't really suitable for long distance travel.

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: 0.0101s ][ Queries: 3 (0.0038s) ][ live ][ 339 ][ ThingOne ]