Okay guys!! I got my kit installing it at this moment!! Help!! Tips?

What to look for and any tips?

Here's my kit:
http://www.bicycle-engines.com/49cc-4G-T-Belt-Drive-Complete-Gas-Powered-Engine-Kit.html

What to tighten and look for? This is my first build!

 

[dougsr.874]

Install the clips that holds on the black plastic belt cover BEFORE you mount trans. to engine....