You could buy a filter cheaper on Ebay than shipping would cost from me.
The Tech won't fit your 50, and I'm not gonna part out the engine.
BUT for what my used sh** would cost you... GO TO SPI, and get the right stuff. Like 100.00 or less for a pipe, and 40-45 for the Polini three stage Race bell maybe another 20.
I'd charge double that for my parts, and still charge shipping. In fact triple.
1500.00 for the whole f'n thing... Willing to trade... Just not for a crappy scooter. Lawyers Guns or Money ONLY