Hello, I'm trying to put this kit I bought off eBay a while ago together and am running into some trouble right off the bat. Hopefully some of you can help me out 
1. Don't have the mount for the fat tube. It looks like it is just a piece of metal with 3 holes drilled and a couple bolts? Also, how do you remove the studs that are already in the engine to hold the skinny tube mount?
2. Rear sprocket is flat with only 5 holes, unlike the 9 hole in the instructions that is not flat. No matter how I turn it, the 5 holes will not all make it thorough the spokes. One will always hit dead center into one or more of them. I tried with two different bikes. Should I just eat the cost and buy the 9 hole one?
3. Another with the rear sprocket. I have seen conflicting instructions. Do I put one of the rubber grommets between the spokes and the sprocket? Or does the sprocket go right against the metal?
Thanks!

1. Don't have the mount for the fat tube. It looks like it is just a piece of metal with 3 holes drilled and a couple bolts? Also, how do you remove the studs that are already in the engine to hold the skinny tube mount?
2. Rear sprocket is flat with only 5 holes, unlike the 9 hole in the instructions that is not flat. No matter how I turn it, the 5 holes will not all make it thorough the spokes. One will always hit dead center into one or more of them. I tried with two different bikes. Should I just eat the cost and buy the 9 hole one?
3. Another with the rear sprocket. I have seen conflicting instructions. Do I put one of the rubber grommets between the spokes and the sprocket? Or does the sprocket go right against the metal?
Thanks!