G1, This post said I have a 14 tooth, But I do have a 15 tooth on it now, I cant remember where I got it but its a timing belt pulley made out of aluminum, I had to drill out the hole and tap new threads. If your looking for higher top speed stick with the 14 for the 40 tanaka, my 47r can barely pull the 15. If you still want the 15 look on the net for timing belt pulleys. ps have a machine shop drill it and tap it I screwed up 3 pulleys could not drill it strait and they wobbled on the shaft, and I have a drill press.
