Do you sell big bore kits. I have a 50cc and would like to go to 100 to 120cc. How much for either big bore kit if you sell these kits.

Yes we sell Znen B B kit's starting at $99.00 plus any other options you want to add. We do not INSTALL the cheap aftermarket from amazon or yours that you have.

Call them

They said they was going to charge me $250 just to install a 30cc kit to my brand new 50cc scooter just because I didn't buy the kit there.

I think he does. If not, you can get them from ebay or amazon

Am sure he does