3rd build, wat engine is good to get?

[adotheawesome]

hey guys, im building another bike but am not sure wat engine to get

can anyone help? i've been looking at the rock soild 50cc hp1 engine

http://shop.rocksolidengines.com.au...&category_id=2&option=com_virtuemart&Itemid=1

this is my previous bike that i am going to make again

https://www.facebook.com/photo.php?....425956157872.210629.733312872&type=3&theater

any thoughts?

 

[ocho ninja]

Dax's 50cc 9hp engine....

 

[adotheawesome]

cant get one of them in austrailia