Modern Vespa

hello, i would like to put a j costa vario on my gts 300 hpe from 2022.
Does anybody have experience with this ?

I had one on my MP3 500. It worked well enough making for a more entertaining ride all round. The problem I had was a need to clean it out regularly or it would stick after sitting overnight. This meant I had to drive a couple of blocks at about 20 kph in the morning before it would unstick and work properly. Having to open the side of the driveline to clean this out about every 4000 km meant I gave up on it after about 20000 as just not worth the effort. The stock variator never gave me any trouble, routinely going 10000 km between routine services without any issues.

The J Costa brass centre bushing wears out - this must be replaced before it ovals, as this will cause the belt to shred and break after only a few hundred miles. BTDTGTTS on my Fuoco.

The variator itself gave very smooth and rapid acceleration - it was good for that. However replacing the weights and bushing every 12,000 miles or so became very expensive.

The OEM steel centre bushing seems to last forever, and judicial choice of Dr Pulley sliding 'rollers' along with a 'Fuzzy' washer give just as good performance IMHO as the J Costa.

I totally agree with JIMC, right up to the mileage. This on my T-Max.
The Dr Pulley replacement proved to be almost as good and a better 'bang for the buck'

We started carrying them, and from what I've seen, some people like the way the JCosta Pro variator changes the scooter's performance, especially on the big engine scooters. According to one of the Costas at JCosta, they've modified the design over about five generations to directly address the durability issue. The bushing that needs to be replaced is around $25-30. So far, we haven't gotten any negative feedback, or premature failures reported, and they do warranty the product for three years if it is professionally installed and maintained according to their requirements. But it's definitely not a part that I would want to test for the outer limits of durability.
Keep in mind that the product was designed for race applications, and JCosta does actively race scooters. So the performance objectives they develop for might not be the same objectives many people are looking for in a Variator for street purposes.
If you do decide to get one, keep in mind that there is still inventory of much older JCosta Evo 1,2 and 3 versions in inventories. The JCosta Pro is the current version, which supersedes all of the Evo versions. That is the one I would recommend. There is also an XRP kit, which is a race version of the Pro, with a special belt.

Thanx for your comment