OP
@akpasta avatar
UTC

Hooked
1980 Vespa 100 Sport
Joined: UTC
Posts: 137
Location: San Francisco
 
Hooked
@akpasta avatar
1980 Vespa 100 Sport
Joined: UTC
Posts: 137
Location: San Francisco
UTC quote
I was complaining about the poor braking on my Vespa 100 Sport (I've tried everything) and someone suggested trying 10" wheels, the idea being, larger brake shoes, more surface area, etc.

Interesting.

Can you just swamp 10" tires and rims onto a small frame? Will the tires rub? Do you need to swap anything else? Will it actually improve braking at all?

Thanks,
@sdjohn avatar
UTC

Veni, Vidi, Posti
'15 GTS300, '86 PX125EFL, '66 VBB, '01 ET4
Joined: UTC
Posts: 8421
Location: San Diego, CA
 
Veni, Vidi, Posti
@sdjohn avatar
'15 GTS300, '86 PX125EFL, '66 VBB, '01 ET4
Joined: UTC
Posts: 8421
Location: San Diego, CA
UTC quote
what size do you have? my primavera had 10"
OP
@akpasta avatar
UTC

Hooked
1980 Vespa 100 Sport
Joined: UTC
Posts: 137
Location: San Francisco
 
Hooked
@akpasta avatar
1980 Vespa 100 Sport
Joined: UTC
Posts: 137
Location: San Francisco
UTC quote
I found this thread, and it made me rethink the idea - 8" to 10" wheel conversion - 1961 Vespa VNB
@v_oodoo avatar
UTC

Style Maven
'74 50s x3 '87 PK125XL '92 PK50XLS Plurimatic - & - '58 AllState '68 Sprint '66(?) Super125 and '72 DanMotor Super150
Joined: UTC
Posts: 9588
Location: seattle/athens
 
Style Maven
@v_oodoo avatar
'74 50s x3 '87 PK125XL '92 PK50XLS Plurimatic - & - '58 AllState '68 Sprint '66(?) Super125 and '72 DanMotor Super150
Joined: UTC
Posts: 9588
Location: seattle/athens
UTC quote
Take a look, you already have 10" wheels and your 100 Sport has bigger brakes than older 50S and 90 smallframes. Time to get new premium modern brake shoes I think.
@sdjohn avatar
UTC

Veni, Vidi, Posti
'15 GTS300, '86 PX125EFL, '66 VBB, '01 ET4
Joined: UTC
Posts: 8421
Location: San Diego, CA
 
Veni, Vidi, Posti
@sdjohn avatar
'15 GTS300, '86 PX125EFL, '66 VBB, '01 ET4
Joined: UTC
Posts: 8421
Location: San Diego, CA
UTC quote
the earlier smallies had 9" but they are hard to find
@v_oodoo avatar
UTC

Style Maven
'74 50s x3 '87 PK125XL '92 PK50XLS Plurimatic - & - '58 AllState '68 Sprint '66(?) Super125 and '72 DanMotor Super150
Joined: UTC
Posts: 9588
Location: seattle/athens
 
Style Maven
@v_oodoo avatar
'74 50s x3 '87 PK125XL '92 PK50XLS Plurimatic - & - '58 AllState '68 Sprint '66(?) Super125 and '72 DanMotor Super150
Joined: UTC
Posts: 9588
Location: seattle/athens
UTC quote
Most all smallies had tens, only the oddball 50N and 50R had nines.

External inline image provided by member with no explanatory text
50N w/ 9" wheels and 10" adaptor alongside.
OP
@akpasta avatar
UTC

Hooked
1980 Vespa 100 Sport
Joined: UTC
Posts: 137
Location: San Francisco
 
Hooked
@akpasta avatar
1980 Vespa 100 Sport
Joined: UTC
Posts: 137
Location: San Francisco
UTC quote
V oodoo wrote:
Take a look, you already have 10" wheels and your 100 Sport has bigger brakes than older 50S and 90 smallframes. Time to get new premium modern brake shoes I think.
I did!! I've got new brake shoes already! I'm not sure what more I can try.

I did see this - Another SF anti-dive testimonial The Crimaz anti-dive adapter. I wonder if that would help?
@roland87 avatar
UTC

Molto Verboso
'13 LML Star 200, '81 50 Special, '81 P 150 X, '87 PK 50 Nuova, '84 PK 50 S
Joined: UTC
Posts: 1213
Location: Ukraine. Kyiv.
 
Molto Verboso
@roland87 avatar
'13 LML Star 200, '81 50 Special, '81 P 150 X, '87 PK 50 Nuova, '84 PK 50 S
Joined: UTC
Posts: 1213
Location: Ukraine. Kyiv.
UTC quote
If you want your brakes proper working you need to sort all parts of the system:
- lever/pedal
- cables and its sleeves, end caps
- cams
- shoes
- drums

All must be clean, greased where need and correctly adjusted.

SIP cables is the best in my opinion, it no need any grease.

The best brake shoes is:
SIP Performance - front and rear.
Newfren AntiAqua - front and rear.
I'm not tried but sure that SIP Premium also good shoes.

I also can't recommend Malossi Brake Power shoes for road use. It is more racing shoes and need to good warm up before it is start to brake proper.
OP
@akpasta avatar
UTC

Hooked
1980 Vespa 100 Sport
Joined: UTC
Posts: 137
Location: San Francisco
 
Hooked
@akpasta avatar
1980 Vespa 100 Sport
Joined: UTC
Posts: 137
Location: San Francisco
UTC quote
roland87 wrote:
If you want your brakes proper working you need to sort all parts of the system:
- lever/pedal
- cables and its sleeves, end caps
- cams
- shoes
- drums

All must be clean, greased where need and correctly adjusted.

SIP cables is the best in my opinion, it no need any grease.

The best brake shoes is:
SIP Performance - front and rear.
Newfren AntiAqua - front and rear.
I'm not tried but sure that SIP Premium also good shoes.

I also can't recommend Malossi Brake Power shoes for road use. It is more racing shoes and need to good warm up before it is start to brake proper.
THANK YOU for this round-up of what to buy and where. I've replaced all cables and brake shoes and greased and lubed everything.

I purchased all the parts from Barry at San Francisco Scooter Center. No clue what they are, but they sold them to me. It's likely they stock good parts, right?

edit - I believe the shoes and cables are probably SIP.
@roland87 avatar
UTC

Molto Verboso
'13 LML Star 200, '81 50 Special, '81 P 150 X, '87 PK 50 Nuova, '84 PK 50 S
Joined: UTC
Posts: 1213
Location: Ukraine. Kyiv.
 
Molto Verboso
@roland87 avatar
'13 LML Star 200, '81 50 Special, '81 P 150 X, '87 PK 50 Nuova, '84 PK 50 S
Joined: UTC
Posts: 1213
Location: Ukraine. Kyiv.
UTC quote
akpasta wrote:
I purchased all the parts from Barry at San Francisco Scooter Center. No clue what they are, but they sold them to me. It's likely they stock good parts, right?
I'm really don't know how good is stock Barry parts because I'm for 9848 km from San Francisco
akpasta wrote:
I've replaced all cables and brake shoes and greased and lubed everything.
And you still have bad brakes?
OP
@akpasta avatar
UTC

Hooked
1980 Vespa 100 Sport
Joined: UTC
Posts: 137
Location: San Francisco
 
Hooked
@akpasta avatar
1980 Vespa 100 Sport
Joined: UTC
Posts: 137
Location: San Francisco
UTC quote
roland87 wrote:
And you still have bad brakes?
They work, but you have to apply a lot of pressure and they still don't stop that well.
@v_oodoo avatar
UTC

Style Maven
'74 50s x3 '87 PK125XL '92 PK50XLS Plurimatic - & - '58 AllState '68 Sprint '66(?) Super125 and '72 DanMotor Super150
Joined: UTC
Posts: 9588
Location: seattle/athens
 
Style Maven
@v_oodoo avatar
'74 50s x3 '87 PK125XL '92 PK50XLS Plurimatic - & - '58 AllState '68 Sprint '66(?) Super125 and '72 DanMotor Super150
Joined: UTC
Posts: 9588
Location: seattle/athens
UTC quote
How new are they? Often they need some time to seat in 100%. If you're concerned, ride around a bunch hitting your front brake HARD a lot, then pull your front drum and observe the contact pattern on your new shoes. You can do same on the rear too obviously.

Your old brakes that you may be comparing to likely had 100% contact w/ the brake drums.
⚠️ Last edited by V oodoo on UTC; edited 1 time
@roland87 avatar
UTC

Molto Verboso
'13 LML Star 200, '81 50 Special, '81 P 150 X, '87 PK 50 Nuova, '84 PK 50 S
Joined: UTC
Posts: 1213
Location: Ukraine. Kyiv.
 
Molto Verboso
@roland87 avatar
'13 LML Star 200, '81 50 Special, '81 P 150 X, '87 PK 50 Nuova, '84 PK 50 S
Joined: UTC
Posts: 1213
Location: Ukraine. Kyiv.
UTC quote
akpasta wrote:
They work, but you have to apply a lot of pressure and they still don't stop that well.
New brake shoes need some kilometres before they work properly.

Also how about cables routing? Brake lever/pedal condition? How deep can you push the brake lever/pedal. Brake cams was cleaned and greased? Brake drums condition?
OP
@akpasta avatar
UTC

Hooked
1980 Vespa 100 Sport
Joined: UTC
Posts: 137
Location: San Francisco
 
Hooked
@akpasta avatar
1980 Vespa 100 Sport
Joined: UTC
Posts: 137
Location: San Francisco
UTC quote
roland87 wrote:
New brake shoes need some kilometres before they work properly.

Also how about cables routing? Brake lever/pedal condition? How deep can you push the brake lever/pedal. Brake cams was cleaned and greased? Brake drums condition?
They've got a few miles on them for sure. Cables are routed great, lever and pedal condition all good. Drums have plenty of material left, I've scuffed em' too to help the grabbing.
@roland87 avatar
UTC

Molto Verboso
'13 LML Star 200, '81 50 Special, '81 P 150 X, '87 PK 50 Nuova, '84 PK 50 S
Joined: UTC
Posts: 1213
Location: Ukraine. Kyiv.
 
Molto Verboso
@roland87 avatar
'13 LML Star 200, '81 50 Special, '81 P 150 X, '87 PK 50 Nuova, '84 PK 50 S
Joined: UTC
Posts: 1213
Location: Ukraine. Kyiv.
UTC quote
Then strange. In my opinion few miles is not enough. I noticed that new shoes on my Vespas is need 80-100 km to start work properly.
So maybe shoes is not good quality.
DoubleGood Design banner

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.

Buy Me A Coffee
 

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


All Content Copyright 2005-2024 by Modern Vespa.
All Rights Reserved.


[ Time: 0.0137s ][ Queries: 6 (0.0026s) ][ live ][ 313 ][ ThingOne ]