I have matched them up from a hardware store before and it worked out just fine. A few weeks ago a customer bike came into the shop i frequent and had a "no spark issue" After kicking it and hearing the flywheel clunking around I knew it was the wooddruff key. It was late, no shops where open and then customer needed the bike back my the morning for a ride. So, we made one. Worked great, well after we figured the parking break over ride was causing it not to spark.