OP
UTC

Lurker
Vespa px 125
Joined: UTC
Posts: 1
Location: Milton
 
Lurker
Vespa px 125
Joined: UTC
Posts: 1
Location: Milton
UTC quote
Hi everyone,

I have recently fitted an new like for like stock carburettor to my px. Now everytime I start it up and select first gear it's just starts rolling? Before changing the carb it had never done this before. Wondering if just a quick fix and I haven't adjusted something properly or clutch just so happened to go after adding new carb and was just bad timing. coming from second to third gear is a pain and sometimes just jumps straight into fourth.
Any help is appreciated.
@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: 1268
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: 1268
Location: Ukraine. Kyiv.
UTC quote
At first check and adjust clutch cable.

Jumping gears can be caused by:
· wrong adjusted gear cables
· worn gear selector
· worn cruciform
· worn gears cogs
· worn gears cogs spacers
· wrong assembled gear box
UTC

Jet Eye Master
PX221 MHR, O tuned PX200, PX125 and some motorbikes
Joined: UTC
Posts: 4609
Location: London UK
 
Jet Eye Master
PX221 MHR, O tuned PX200, PX125 and some motorbikes
Joined: UTC
Posts: 4609
Location: London UK
UTC quote
Jackfitz23 wrote:
Hi everyone,

I have recently fitted an new like for like stock carburettor to my px. Now everytime I start it up and select first gear it's just starts rolling? Before changing the carb it had never done this before. Wondering if just a quick fix and I haven't adjusted something properly or clutch just so happened to go after adding new carb and was just bad timing. coming from second to third gear is a pain and sometimes just jumps straight into fourth.
Any help is appreciated.
Just unlucky. Pull the clutch lever and kick over with the engine not running. If it feels draggy it needs tightening. If the lever is very tight and still dragging, then the problem is inside the clutch.
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