Home > Uncategorized > Trade-off Completed, Power for Range

Trade-off Completed, Power for Range

Today I rode for the first time after reprogramming the controller in my scooter. I had lowered the maximum power from 80% to 70% and reduced the maximum speed as well. Making the change was relatively easy once I properly configured my windows xp installation running on Parallels on my Macbook Pro. The application itself was a free download.

Most important, was testing the range, the issue which has been most difficult for me. I’ve previously attempted a 16 mile round trip only to complete the last couple of miles in “limp mode” when the maximum speed is only a few miles an hour. This time I fared much better, riding 22 miles before I limped the last few feet home. Twenty miles is enough for pretty much any ride I would undertake without having the opportunity to charge in the middle. i can now easily visit friends in Alameda without a problem, though the furthest points of Richmond might be pushing my luck, especially if steep hills are involved. For those who may be reading this and who are located in a less hilly region than Northern California, note that I had some serious hill climbing in these 22 miles. The most noteworthy was the steep climb up Pleasant Valley Road from Broadway up to Piedmont Avenue. In a less hilly region, it might be possible to squeeze a few extra miles. When time allows, I may try a flatter ride to see what difference it makes. In the meantime I’m grateful to have the extra range.

But how much did I give up in terms of power? My maximum speed at 80% power was 50mph which I only hit a couple of times. 45mph was a more realistic max. Now that has been reduced by 10mph to just 35. Fast enough to maintain the legal urban speed limit, but occasionally a bit slow to keep up with traffic. It’s a compromise for sure and I can always tweak the power setting a bit to 73 or 75% if I decide its necessary.

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  1. dennis r.
    August 11, 2010 at 4:37 am

    NATIVE Z6 Electric Scooter Impressions and 450 Mile Opinions and Views – Product Review
    with LIFEPO4 battery

    GOOD POINTS
    Regen braking does 90% or more of braking – however, the twist throttle must be turned back slowly, otherwise the regen braking does not engage.
    35 mile range in real-world driving to 100% drain; 25 mile range allows for 70% depth of discharge which is suggested for optimum battery longevity.
    Low center of gravity – good balance and side-wind resistance.
    An infrared thermometer shows that all components stay under 50 degrees Celcius including disc brake, controller casing, motor casing, batteries, and Battery Management System circuit.
    Good headlights.
    Foot board allows for different sitting positions comfortably.
    Excellent (durable-looking) quality materials throughout.
    Motor does not draw high amps at low speed (in contrast to the Ego electric scooter, and most other brushed DC scooters)
    Tires stick well to the road in dry and wet weather.
    Good acceleration.
    Very good brakes.
    Fun to ride!
    Looks great.
    Excellent ride characteristics once the rear shocks has been tuned for softer riding by an experienced motorcycle mechanic.

    BAD POINTS
    Fuel/energy gauge sits at full, or near full, until the very last mile.
    No storage unless an after-market box is added (from $50 or more)
    Manufacturer did not provide a user guide or service manual. The said manufacturer of the BMS in California does not answer their phone, and this company has no contact info on the Internet, should something go wrong.
    Surges (controllably) at very low speeds.

    NUETRAL POINTS
    Battery charger has a cut-off relay “kludged” with fragile-wires that will need attention if not handled very gingerly.
    Brake lever does not disengage motor.
    Like most other electric scooters, without modifications to ruggedize and weatherize the Native Z6 Lithium, weather and durability issues will likely crop up by 1000-2000 miles, and may be hard to diagnose due to lack of service and maintenance information.
    No motion-sensing alarm, but an aftermarket alarm can be added.
    Manufacturer states that motor brushes may need to be replaced at 4,000-6,000 mile intervals.

    INFORMATION FOUND ON THE INTERNET ABOUT THE Z6 (snipped text)
    We are advised that the Electric Motorsport (made by Native Cycles?) Native Z6 requires motor terminal re-torquing at 300 miles and yearly intervals. (No user manual from the company, unlike their GPR-S.

    A look at the Z6 electrical terminal shows that there is no lockwasher. Fairly hard to reach one terminal which is underneath the chassis. Might be impossible to reach with a torque wrench — only a long thin piece of wood can be inserted far enough in my exerience. Do you think that using thread-locker liquid on the nut would hold it, and prevent slippage?

    Since this appears to be a brushed/brush motor, we’re thinking of vacuuming the brush dust every 500 miles — does this seem reasonable?

    Chains — to lubricate every 300 miles.

    I oil the non-O-ring chain on my GPR-S every 100 miles and have only had to adjust the chain slack once within 1200 miles. I recommend oiling the chain more frequently than 300 miles if it is not an O-ring design.

    My 2009 GPR-S manual (which I can send to you if you PM me) has little advice about maintenance. I also have the Tiger Boxer owner’s manual (which I can also send you) and it also has almost no maintenance advice. There is no information about changing brake fluid, changing fork fluid, greasing and adjusting steering bearings and swing arm bearings, removing and replacing the wheels and brake calipers, etc. Chassis maintenance is left up to you to figure out. There is also little in the way of torque values for the chassis fasteners available. The recommendation is for you to take it to a local motorcycle dealer – whom I am sure would not touch the bike with a ten-foot pole for liability reasons. These bikes are designed for hobbyists who will have do their own maintenance and repairs, in my opinion.

    I lubricate the chain of my Brammo Enertia every 200miles and tighten the chain every 1k miles. I also inspect brake pads and tire tread at 1k intervals.

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