Main jet size and performance air filter

[Golota]

Hi guys,

I'm thinking about doing a little tuning for my 05 Xciting 250.

Do you know what the standard carburetor main jet size is? My (used) scooter came with the wrong size and I can't seem to find the info anywhere. The manual says "Ky94", but that doesn't help when I'm looking for aftermarket parts.

Also, I'm looking for a performance air filter. I know that nothing is available as a direct replacement, so I'm thinking that I will purchase a part that slips on the carburetor bore. The funny thing is that all sites say 32mm for the 250 GY6 engine (CN250), but the manual says 30 mm.

As always, your help is much appreciated.

[Golota]

In the meantime, I have found the main jet sizing.

In Japan, Taiwan and other countries where there is no restriction, the main jet size is #105.
Some countries use #102
Some other countries restrict the main jet to #98 (happened to my scooter).

I hope it helps for someone with the same iproblems I used to have.