I guarantee you that Brammo is hemorrhaging money in their ill-fated quest to build an electric bike that operates like an IC bike and no parent company or investor will put up with that for long. The main culprit is an unnecessary six speed gear box and the added weight and lower range that is one trade-off vs no gears.
You know the Empulse claims lower 70 mph energy consumption vs the Zero, right? ~160 Wh/mile Empulse vs ~180 Wh/mile for the Zero S. It may or may not be related to the transmission - Empulse could be more aerodynamic, tests could be bunk, tailwind for the Empulse within allowable range, etc. But a 470 lb bike with significant transmission loss and 17% more battery gets 30% more highway miles.
I would guess Empulse will break even in energy/mile vs the Zero around 45-50 mph. And even below that point, it still has 17% more battery .. despite the
130 pounds of tubby it still beats the Zero in city range.
Does the transmission add weight? Absolutely, probably 20-30 lbs. Empulse is a porker. And yet ..
670 lbs bike + rider / ( 40 kW peak = 53 hp ) = 12.6 lbs / hp, 5s 0-60
540 lbs bike + rider / 29 hp = 18.6 lbs / hp, 10s 0-60
Empulse per specifications has 33% less weight per hp to carry, and it halves the S's time to 60.
The other negative in the trade-off is higher cost. They are attempting to re-create the experience of an IC bike to appeal to IC bike riders who can't get their heads around the natural smooth torque curve of an electric motor. Huge mistake. Higher cost/lower range is not a solution. The user will catch up with the technology. It's stupid to hobble new technology with anachronisms. Imagine Apple initially shipping the iPhone with only one app that makes it work like an old cell phone because users were originally familiar with the interface on a cell phone. The thing runs 1000s of apps, for pete's sake. That's what the iPhone is about.
We've already addressed lower range. Let's talk higher cost.
Zero charges $2500 for the extra 2.6 kWh ZF3 module that converts a ZF6 bike to a ZF9. Let's call their marginal pricing $1000/kWh.
Empulse has 1.4 kWh more nominal capacity (9.3 - 7.9 kWh). So there's $1400 of the $3000 price delta.
In practice the Delta-Q onboard the Zero bikes charges at 12A max, so around 800W to the battery pack. Empulse's charger should be around 3 kW delivered. Roughly the capacity of four Delta-Qs. 3 additional chargers + a J1772 inlet will run you about $2000. Plus installation.
Passenger pegs are stock on the Empulse, $300 option from Zero.
$3700 in somewhat hand-wavey add-ons. Not putting a price tag on the significantly higher performance, significantly better display + computer interface, or higher-tech (and perhaps more failure-prone) design.
I think we'll see a 2013 Zero that's significantly more competitive with the 2013 Empulse, and it is indeed unfair to compare a 2012 bike that has been shipping for seven months to a 2013 bike with no hard production date. Nevertheless, the Empulse's price appears to be justifiable given its advantages over the shipping Zero ZF9.
An argument can be made for two gears on an electric, one up to approx. 40MPH and another to 100MPH, but no more, and if and only if it can be done without adding weight that reduces range. A better weight/value trade-off is ABS.
Agreed. ABS needs to be available on these >> $10k bikes yesterday.
I'm sympathetic to the two-gear argument. The only real rationale I can find for six gears is that it may make the transmission more durable by minimizing RPM swings between gear shifts.
BorgWarner Magna knows a thing or two about transmissions, and they couldn't build a two-speed transmission for Tesla that wouldn't explode under high power shifts. Brammo (or more properly SMRE) may have found a similar justification for more than two speeds.
All of this is academic because it's obvious that Brammo's product marketing team is dysfunctional. My bet is that they are captive to the engineering team and powerless. Look at the way they have handled the delays in the Inertia+ on top of delays of the Empulse. They are trying to stall Zero sales with a string of fake delivery dates for bikes that never materialize but instead they're stalling their own sales.
A friendly wager... $10 says they abandon the Empulse within six months and the who gig fails within 12.
Agree that Brammo has done an exceedingly poor job of meeting promised specifications, prices, and delivery goals .. and an even poorer job of communicating with their would-be customers.
Setting that aside for a moment -- if you care to make the wager serious, and I'll spot you double the timeframe -- I could use an extra 1000 miles of energy for the Zero. : )