WR250R/X SpeedoDRD speedo healer
If you have altered your sprockets from the standard sizes then it is likely your speedo readings are now inaccurate. The SpeedoDRD speedo healer will correct your speedo readings very accurately.
I have just fitted offroad sprockets to my own WR250R and the speedo was reading 60mph when the true speed as shown on my GPS was 50mph.
I fitted a test SpeedoDRD and adjusted it using the special button. Tested against a GPS the WR250R's speedo is now remarkably accurate!
The price is a good saving on buying from the States and no waiting, customs, Parcel Force charges, etc.