vespa small frame

[cookie]

had a small frame in bits for a few years now decided to build it.
think its a bit of a bitsa checking engine number (V9B1M) it states its a 1980 vespa 100 or 100 sport so a bit stuck here as wanted to upgrade it to 131cc so need list of parts to do this.
but frame is small frame with the sqaure indicators so a bit lost want to do this hopfully for my self as had one ot theses in about 86 and would love to get this all together and get f
riding again eg rallys things like this any help would be helpful and one day hopfully see on rallys with this project .

many thanks cookie 

[tzsteve]

you may be better with a 135 kit should be ok for 60 - 65 mph

what sort of performance are you after? 60mph+ or 70mph+

[cookie]

Jan 23, 2021 15:40:06 GMT tzsteve said:

you may be better with a 135 kit should be ok for 60 - 65 mph

what sort of performance are you after? 60mph+ or 70mph+

about 60 would be fine but what parts im lost as not sure what parts will fit this engine do i have to upgrade gears clutch  and so on
not after nothing spiecal just a good runner at the end of it with the pride i rebuilt it 
thanks for reply .

[tzsteve]

have a look for a dr 135 kit
i dont know what crank you have but you need a 51mm stroke crank
you will need a 125 pipe
a bigger carb 19mm minimum ( 26 mm better ) plus a manifold to match 

do a search here for 135 kits that others have fitted

a swap of the primary gears Standard 125 will be fine also standard primaries are cheap and plentiful


a little blending on the case will help to give a little boost
a lighter fly wheel will make for a better ride
its all simple stuff 

[rhys]

V 100 had 3 speed box so probably worth swapping out for a 4 speed if you are going to be doing any distance.
Crank will be 51 but you will need to put longer studs on for 135 kit

[tzsteve]

rhys thanks for picking up on my ignorance,
I've only ever had 125 and over