I have replace my Cosa 2 Pinasco Alu piston kit 177cc.
Now I am looking to replace exhaust as the origin one is not good performace (may be too small).
Could I buy exhaust for 150cc (http://www.sip-scootershop.com/en/products/racing+exhaust+sito+plus+for_23000000)
Or better I go with 200cc (http://www.sip-scootershop.com/main/base/Details.aspx?ProductNumber=23010000)
Please advice me on this issue, or if you think better exhaust for my Cosa 2, pl. give me the link.