ElectricMotorcycleForum.com

The second battery maintains full torque to max motor rpm, while the single battery gradually reduces torque above 40mph or so. Below 40 my 2.8 accelerates slightly faster than my 5.7  (40+ pounds lighter), then the 5.7 just walks away from it.

Ray

I like using the rear battery in the dirt bike (which keeps the front end light) and the front battery in the street bike, which keeps the front end down and also shows off the motor.

Both batteries are field-removeable.  If you run one battery, you'll need the battery plug that should be Velcro-ed to the frame above the front battery bay, near the horn.

To take out the rear battery, obviously first unlock & remove the RH frame rail, then I hook my fingers around the LH bottom and rear frame rails and push hard on the bottom and side of the battery simultaneously with my thumbs - usually it pops right out.  The front's the same, except the front frame rail isn't as accessible so it's easier to use both hands on the bottom frame rail and push a little higher on the battery case.  The idea is to not cock the battery during removal, and push it straight across the battery bay.

Ray

Great explanation - thanks!

Would there be any advantage to upgrading to a size 6 controller with a single 2.8 module and 75-5 motor?  I've been wondering about this for a long time.

Ray

Completely understand everything you said!!! Especially about 2 brick being heavy for dirt


Honestly if you do lot of dirt riding the mmx is going to take the best of both worlds
You will get the bigger motor which will greatly improve acceleration down low and up high but also to me give you more "control"

Yes it takes more energy to move the bigger motor in the same fashion so it has a little less range.

 I never notice and I would also like to point out that it is significantly easier for the bigger motor to propel the bike.


 So in ahilclimb that you have had to stop halfway through for whatever reason,
On the fx you lean forward and pin it, it will move forward and slowly reach the same point as the throttle, it's playing the "catch up game".
The mmx with just the bigger motor won't have new as much"catching up to do" and is much snappier like a "two stroke" compared to 4 stroke ( only equal comparison of acceleration I can think of).  Yes you get the acceleration on the bottom with electric and top with gas but the gap from 2 stroke to 4 stroke is similar from 1 motor to the other imo.  The size six takes that same theory to the limits.....
For me it was like the first time you get on a 250 2 stroke. Barely anything then it comes on like a bat out of hell.... Imagine 2x that from a standstill

I know what your saying about the mmx,   It is buying a legal m61 LOL something's are like teeth pulling

For instance I live in Santa Cruz it cost me less than 3$ in my tundra to get to zero and back( even getting 12 mpg yes I do pull 5000 rpm a getting on the freeway).  It cost 10-25$ to drop ship a part to me from zero going through some dealership..... It would still cost me less if I paid the "Msrp" went to pick the part up and then still giving the dealer his 33%.....yes we are arguing over small numbers, but I can guarantee 90% of the people who bought zero bikes ran the number for months to find out if it was woth spending the money, their demographic is EE's or EE type people, electric enthusiasts; tipiically well educated people who run the numbers.....
There new company policy is "go to your nearest dealer" they are the manufacuter; furthmore a dealer of new and used bikes. Having bought most of my collection of zeros directly from them, there at their dealership and showroom, I would think that they are still a dealer that sells motorcycles.....they would support people who bought bikes local..... It also gives me a reality check as if I did not know so many people who have worker there and do work there, would they help me with parts....like if I was in Australia or Europe.

It should be easy to buy upgrades parts, motors controllers etc, it's all money in their pockets.

Things in customer service are getting better, I'm sure in reality they are somewhat understaffed as I see them hing temps constantly and everyone who stops and talks to me has had a brother cousin for friend work there, part of it is the nature of the business, part in my opinion could be mistakes

I finally got some more time in the dirt yesterday with my FX, and have found all of the above comments to be right on.  One (rear) battery is the way to go, lighter but not noticeably weaker at off-road speeds.

I also found that I dislike the power lag.  On small stream/log crossings, I find that I need to plan ahead more and blip the throttle 1/2 second earlier than with my 2-stroke MX bike.  The FX can float the front wheel over, but since I switch back and forth between the two bikes, I'm positive that I'll occasionally forget about that timing difference and end up going over the bars.  Similarly, on hill climbs, I find that I grab extra throttle during that 1/2 second delay, thinking I need it, but then I lose traction when the power finally catches up.  I think both of these are just learning curve issues that I could easily get used to IF they weren't so different than my gas bike.  Not deal breakers though, just different.

On the other hand...  There were also several times when l found myself desperately (and needlessly) kicking down with my left foot when braking hard coming into a corner (trying to downshift).  ;-)

Thanks for the list.  I'm curious to try the 60mph top speed setting ASAP, to see if I can tell a difference.

The Domino throttle is VERY tempting based on your other posts, but the installation (wiring) hassle may keep me away.  If they had a plug-n-play option for Zeros, I'd probably get one today.