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4/23/2012
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Bigoldbeef
2/1/2018 4:53am
2/1/2018 4:53am
Edited Date/Time
9/3/2021 9:23pm
Is this still a bike that would be eligible in a 250 class?
The Shop
Someone has mentioned retrofitting older bikes, and I think that will be a big thing. Time will tell. I'm glad to see the prices coming down on these things but I feel bad for the guy who already spent 15K on them and they dropped to 10.5k already.
I wonder how much a new battery pack would cost if a guy bought a used one of these in a few years? Any Alta owners have this info? Probably can look it up but my "internetting" hands are fat and lazy.
HP is not nearly as important or as impressive as 147ft/lbs of torque. That's actually pretty incredible.
Fact of the matter is I was going to buy either a new Yamaha or Suzuki but the price drop has changed all of that.
Pit Row
Building a capable electric motor is light work, the problem is the huge, awkwardly shaped and heavy battery. Next-gen tech will probably allow for 5-10 times the energy density at a fraction of the weight.
Think 200 pound motorcycles with 450 destroying power that can ride for an hour straight.
Unfortunately, current lithium battery tech seems pretty much maxed out. There have been some trials with graphene but nothing crazy. The likes of Tesla and Apple are pumping billions into developing the next mainstream ready battery tech and when that day arrives, there will be a HUGE revolution in a bunch of markets, including motocross bikes.
I have almost 80 hours and 1000 miles on mine, and it still runs like it did off the showroom floor.
I get pissed now when I have to clean the air filter and change the oil on my son's KX85!
BobPA, you can come up to NY and ride mine if you want.. and then when you are sold on it we can head over to the local Alta dealer about 10 minutes away and get you one!
I raced my Alta last year several times at local motocross races, and it was no problem charging the battery between motos with a generator. I raced 2 classes, so the race day was A morning practice followed by 4 motos, and at a couple races I did 3 classes ( which is 6 motos for you folks that are bad at math ).
On a side note, 3 classes at 52 years old makes Monday kinda hard!
With the bike not being homologated I could see that being an issue especially if you beat some local guys on gas bikes.
We are out for a year or so due to my sons injury but if they had a class to race in I would definitely consider one.
I have a 50amp outlet in my garage to charge my Teslas. Anyone know if I can plug into that outlet? It's a NEMA 14/50 if that helps.
Did the recharge time on 120v speed up as well?
Can you charge 120v or 240v or do you have to pick one when you order?
If you want to charge on 120v and 240v will you need to order a 120v and 240v specific charger? Or does the 240v charger have provisions for charging on 120v?
Jason
In fact, based on data from Alta, if you connected the bumpy torque peaks for each gear of a typical 250F with a smooth fitted curve it would look very similar to the torque curve for the Redshift. However, the Alta has no torque "dips" and therefore is superior on the “paper dyno” as there’s definitely “more area under the power curve”. Plus the Alta exceeds the 250F at every point along the curve! And without the need to shift you never suffer from the loss in time/distance associated with shifting or the erratic change in torque at each gear change.
This makes the Alta "feel" similar to your gas bike, it's just faster. And that's what Alta wanted to create. However, it's not orders of magnitude faster as a direct comparisons to torque specs might suggest.
I hope the torque increase is focused way down low, as the Alta lacks a bit of "punch" or "bark" coming out of tight corners. The HP increase is probably due to stretching the torque numbers out at bit at higher speeds. There's not enough traction to hold much more power in mid speeds so it probably pulls even longer now.
I suspect both are probably a result of changing to a Li-Ion cell with higher C ratings and software tweaks. These make more current available to the motor without a corresponding heat increase in the cells.
The weight reduction I'm not sure. The AERs save 3-4 lbs. The new shock maybe 1 lbs. The newer cells might be a tad lighter, maybe 1 lbs. I suspect the new bike is more like 266 lbs.
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