shark wrote:

Wrong call? https://vespa-ciao.nl/how-tos/transfer-how-tos/maten-v-snaren-ciao-citta-bravo-si/ – Bravo with stock vario: 13×1050
– Bravo with 90mm vario clutch: 13×950
– Bravo with 100mm vario clutch: 13×975

I didn’t try other belts, but I guess that 13×975 would be way too short. It is 7.5 cm shorter than 1050 and it is a lot. I doubt it will fit this setup. What is more, from my observation polini vario isn’t so much different from a standard vario. So why would it need other belt?

In all of setups below there is a stock vario and a standard rear coupling/bell clutch/vario clutch which is 100mm (as i understand it). So how can it be that there are two different belt lengths for the same setup? Only the setup with 90mm clutch is different and requires different belt length.

– Bravo with stock vario: 13×1050
– Bravo with 100mm vario clutch: 13×975

niek1992 wrote:

If you got one of those Kevlar reinforced belts that might be the cause.

Ok, i don’t know how exactly how to recognize kevlar belt, but that may be the case. With this vario i mainly used some belt for industry use and not for mopeds, my bad. So what kind of belts (what brands) are you using? Are RMS belts ok? I have heard that Bando belts are very nice. What about Malossi?

niek1992 wrote:

I run a Power1 vario housing from a Peugeot Fox, which has an aluminum body but with an outer coating that is really durable. At least 15,000km I’ve driven with it and only started to wear down on some places.

I am really satisfied with the Polini vario performane so i want to keep it. And it is also easier to buy.

niek1992 wrote:

Regarding the belt lengths, 13×950(90mm) and 13×975(100mm) or 13×983(103mm) belt lengths are for Ciao. 1050 seems like a more appropriate length belt for Bravo, Citta etc. So i guess Shark made a typo.

Ok, so the belt lenghts from the link are wrong. I always used 13×1050 with Bravo stock vario and it was always ok. And RMS makes Bravo vario belts 13×1050 so it must be right.