Yea ,lol even if you did get the instructions, you wouldn't want to use them. Not very good. But here is a few good places. Page Title Sick Bike Parts FAQs
And so far to me this is the best instructions, as you can download right to your puter, and if you have a laptop its handy to have sitting next to where your building Bicycle Motor Installation Manuals - Bicycle Gas Motor Installation Manuals - Gas Bike Motor Kits Installation Manuals
I got all of these links just by clicking all the vendors on the sides, you should always check all the sites. And good luck on your build. You will find all the help you need here.