Hmmm.... And here I was hoping for a public answer to that inquiry...

When we used to need them (before eTEk and lower RPM) I went to a local lawnmower, power equipment, etc. store. They looked on a go cart site and found 35 pitch sprockets. Some were pre-drilled for an adapter others we found had a 1" center hole and we were able to use a lathe and machine them to the proper size hole to fit tight around a freewheel then just drill 4 - 1/4" holes to hold it to the 16 tooth freewheel. With the eTek the largest rear sprocket we use is a 72 tooth and most of our cars use 58 or 60 tooth. I buy these made out of aluminum and machine them to fit our freewheels.

So can we get a public response for where to find 100 tooth or bigger aluminum sprockets for #35 chain? Thanks

Like I said in my last post. I bought them from a local lawn mower repair shop. They ordered them from company that made them for go-carts. I just glanced at a google search and the third place I looked went to 114 tooth. It was a split ring gear and sold with an adapter hub but I am sure they would sell it without the hub if called www.jackssmallengines.com I put in '100+ tooth go-kart sprockets for #35 chain' for my search.

Actually in your first post on here you never mentioned anything bigger than 72 teeth and I should have specified that I don't want a split sprocket.

http://www.azusaparts.com/ProductPage.aspx?catID=1&subCatID=68&ssCatID=74&productID=3848 Has aluminum sprockets up to 114 teeth