Speedo fix - dropping a tooth

02' gsxr-600 I just ordered a new front sprocket for my bike and decided to drop a tooth. How much will this change the speedo. I know there is a module to repair this.....anyone know where to get one. Price? Is it worth it?

My Dad bought me a 520 conversion for my 06 750 and a speedo healer. The speedo healer recalibrates the the speedometer so that your speed and mileage are accurate. I just put on my new chain/sprockets on so as soon as we get some decent weather I am going to hook up the speedo healer. Check with www.motomummy.com or www.indysuperbikes.com they run about $95, also you can recalibrate it letter if you do more sprocet work

I did the same. At 75 indicated you're doing 65. So about 10mph off. the faster you go, the worse it gets though. Some say it's about 10% difference. Although you can tell the difference from stock, it's not going to be a drastic change in torque.