Vespa 50s need help ;)

Hello. 
I'm Anthony and fan of vespa small frame in Viet Nam .Last time i bought Tuning kit Malossi 112cc from your shop. So i want to buy more stuff for my kit. i am looking for 2 things :

Racing Crankshaft 

Input Shaft 

I don't know which one suitable with my kit. May you give me some advise and option need for the kit.
Thank you for you help. 
 

Hi SIP technical team.
I want to buy one more staff for my kit.
This is a link of kit:
http://www.sip-scootershop.com/en/products/tuning+kit+malossi+sport+112cc+_10304000

i want to buy the thing look like this one :

http://www.sip-scootershop.com/en/products/input+shaft+assembly+211814_40442400

Is this suitable for the kit ? or do you have another option for that  ?

Thanks a lot