Piaggio Zip 50 Cat 2t

I have i piaggio zip 50 cc Cat and have changed the original exhaust to a technigas exhaust but the original exhaust has a rubber pipe that leads to the engine i think and my new exhaust system does not have any were for the pipe to plug into

does this matter and does anyone have any ideas what this pipe is for

Thanks

if your talking about the pipe that comes out of the crankcases and goes to a plastic box with a steel pipe on it, dont worry just leave it all off except the rubber pipe into the cases.

On my zip i removed the whole pipe right to the case. Lighter = Faster :good: