[Deeppurple52]

Your light comes on way early.
1. Purchase small camping fuel bottle at sporting goods store.
2. Run bike until lite comes on and note miles.
3. Run until bike quits... no it won't hurt it.... note miles.
4. Pour in contents of fuel bottle (Mine is 20 oz).
5. Ride to gas station and fill tank as always.
Now you will know exactly how much useable fuel you have. If you fill the tank about 1/2 way up the cup it will hold more than advertised. From empty to where I normally fill my 1600 requires 5.5 gallons (5.3 g. tank)