[timcosby]

not sure about the magician but you can take the fuel line off and drain it till it runs out while the bike is level. then turn it to reserve and drain it into something you can measure how much it is then figure 20 mpg and you know how far you can push the reserve. 20mpg is probably really conservative. another way is to fill it and ride till it quits and not mileage then if you have a can of gas with you run the reserve out and note how far you went then you will know.