218 CC Malossi Kit oh GT200

I am wondering if anyone has had any experience with the 218 CC Kit, Cam and V4 head on their GT200.  I am considering putting it on, but I ride my scooter long distance (5-10000 Km) traveling on the highway in summer.  How does this kit affect reliability of the bike?

i have vespa GT200L converted to "300" by  this kit http://www.sip-scootershop.com/en/products/racing+cylinder+kit+kubler_kbr10002
+ V4 head + akrapovic and etc.. scooter did 14k km and it works fine. 
but in my opinion buy vespa gts 300. stock is much reliable