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UTC

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1991 Vespa T5 Pole Position, 2008 Vespa S 125, 2023 Piaggio MP3 300HPE Sport
Joined: UTC
Posts: 4166
Location: Staffordshire England
 
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1991 Vespa T5 Pole Position, 2008 Vespa S 125, 2023 Piaggio MP3 300HPE Sport
Joined: UTC
Posts: 4166
Location: Staffordshire England
UTC quote
I've just installed 10.5g sliders in my 250 (website said 10 to 10.5g was recommended).

1st impressions were WOW, it's like shit off a shovel!!

But then i got on the highway where it got to 9500rpm very quick and the rev limiter kicked in at approx 68mph whereas it used to do 80mph (indicated).

I have since read on here that others have fitted 12g.

I have some rollers that i can stick in for long highway trips, so it's not a massive issue, but wondered if changing the contra spring on the clutch would have any levelling effect (bit less off the mark - bit more top speed)?
@maksor avatar
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Gilera Fuoco 500ie
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Posts: 4539
Location: Netherlands Olst
 
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@maksor avatar
Gilera Fuoco 500ie
Joined: UTC
Posts: 4539
Location: Netherlands Olst
UTC quote
10.5 is for sprints and inner city 11.5 12 and 12.5 for highways
OP
@fleece avatar
UTC

Ossessionato
1991 Vespa T5 Pole Position, 2008 Vespa S 125, 2023 Piaggio MP3 300HPE Sport
Joined: UTC
Posts: 4166
Location: Staffordshire England
 
Ossessionato
@fleece avatar
1991 Vespa T5 Pole Position, 2008 Vespa S 125, 2023 Piaggio MP3 300HPE Sport
Joined: UTC
Posts: 4166
Location: Staffordshire England
UTC quote
Thanks Maksor

I think i'll leave as is then (most of my riding is non-highway) and fit heavier rollers when i'm mile crunching.

Any thoughts on changing the clutch spring, would this make any difference.
@maksor avatar
UTC

Ossessionato
Gilera Fuoco 500ie
Joined: UTC
Posts: 4539
Location: Netherlands Olst
 
Ossessionato
@maksor avatar
Gilera Fuoco 500ie
Joined: UTC
Posts: 4539
Location: Netherlands Olst
UTC quote
no then go for a Hit clutch
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