The goal of this series of ROG drills is to to determine the impact on the moving average miles per hour and maximum speed of the 17-43 sprocket ratio. I have added the 4 gallon fuel cell to support the first drills in stead of using the RotoPax. By keeping a couple of gallons in the aux tank I can run the main out of gas then switch to the aux to get to the next gas station.With the addition of the 4 gallon auxiliary fuel cell the range of the Janus should increase to over 300 miles. The weight of the empty fuel cell is 6.2 pounds. Add 4 gallons of gasoline, weighing 6.25 lbs each, brings the total weight to about 31 pounds. This is not constant load on the bike as the fuel is used the weight on the rear will decrease accordingly. The low profile of the fuel cell and weight directly over the real axle helps to keep the center of gravity low.
The table below is the record of ROG drills using the 2 gallon motorcycle fuel tank and the stock 17-47 front/rear sprockets.
The Janus Gryffin 250 primary tank holds 2 gallons of 87 octane gasoline. Since the motorcycle does not have a fuel gauge, it is vital that I know the run out of gas (ROG) distance. The main tank has a conventional fuel supply valve with "Reserve." Switching to "Res" will be the low fuel indicator.
Each drill consists of using the 2 gallons in the main tank. The Janus has s digital speedometer with two trip meters. I use both the MC and GPS trip meters to compare miles traveled. I'm using a RotoPax 1 gallon fuel can, tucked under the tail bag, to get to the nearest gas station after exhausting the main tank. A 4 gallon aux tank (pictured below) will replace the temporary RotPax fuel.Miles per gallon calculations are based on 2 gallons.
Drill Procedure:
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| 4 Gal Aux Tank 15" x 9" x 7" (LWH) |
- Start with full tank
- Zero odometer trip meter and GPS trip data
- Start riding
- Record miles at switch to "Res"
- Record miles at the ROG point
- Record MC trip odo miles
- Record GPS Moving and Max MPH
- Note route characteristics & weather conditions. Where possible each route is run in reverse direction to average out head/tail wind conditions.
Notes:
GPS:MC mileage delta = 1:.92, GPS and MC speedometers agree.
Janus Farkles - A Work In Progress
