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@grahamlml avatar
UTC

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Vespa GTS 250 , Baotian 70cc rat scooter, Yamaha V50M 1979
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Posts: 553
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@grahamlml avatar
Vespa GTS 250 , Baotian 70cc rat scooter, Yamaha V50M 1979
Joined: UTC
Posts: 553
Location: Wales
UTC quote
Put a new SIP clutch assembly into my 2T Stella today.
Same teeth as old one 21.
Pulling clutch in no noise and revving in neutral fine.
As soon as I let clutch out in drive it makes a whirring noise as I drive along not had chance do more than a 100 yards in first and second gear.
Could this just be new teeth wearing in with the drive teeth or do I need to worry.
@108 avatar
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V range 50s
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Ossessionato
@108 avatar
V range 50s
Joined: UTC
Posts: 2364
UTC quote
Re: Clutch change
grahamlml wrote:
Put a new SIP clutch assembly into my 2T Stella today.
Same teeth as old one 21.
Pulling clutch in no noise and revving in neutral fine.
As soon as I let clutch out in drive it makes a whirring noise as I drive along not had chance do more than a 100 yards in first and second gear.
Could this just be new teeth wearing in with the drive teeth or do I need to worry.
Sounds familiar...

Had the same problem... I thought it was a badly machined part and swapped it out for an OEM one, problem went away... but realised i actually installed the wrong size

Theres 2 sizes for the same teeth number (40 and 42mm) which is matched to the primary...

Oh I'm assuming its a cosa2 style clutch... and not sure its the case for 21 teeth though...
OP
@grahamlml avatar
UTC

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Vespa GTS 250 , Baotian 70cc rat scooter, Yamaha V50M 1979
Joined: UTC
Posts: 553
Location: Wales
 
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@grahamlml avatar
Vespa GTS 250 , Baotian 70cc rat scooter, Yamaha V50M 1979
Joined: UTC
Posts: 553
Location: Wales
UTC quote
Thank you 108 I shall get chance to check later in the week.
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