Stark range video(s)

[Beagle]

Shane has been releasing vids of all his GNCC races, starting the championship on the MX later switching to the EX, lots of infos about range and everything

In France it's raced in Enduro championship, cross country championship, as well as the MX in SX and MX championships.

See this thread AMA and Electric Motorcycles in AMA races

 

[OpaTsupa]

Sorry all. It seems the original uploader (almost accurately named: Magnus Thor) took it down and reuploaded a different version.
It's the same race Eddi Karlsson did last year on the factory MX.

Here's the link once again:

Stark range video(s)

This is the first of what is supposed to be a new series of videos, here are 2 "amateurs" Stark CEO and senior engineer, and 1 pro rider, official rider Eddie Karlsson, showing the range of the Stark Varg for hard enduro. Technical hard enduro, with low average speed, is arguably the best...

electricdirtriders.com

Since the EX came out 99% of all videos are showing some highly non-Enduro riding, and Lord forgive them, asphalt riding.
I like to believe there are serious riders out there who are using their bikes as intended and don't need to broadcast themselves.
However, the Stark Varg virtual space is filing up with a different current, and I know the company is paying attention to who their future market and direction should be.

@Erwin P is on MX, and Shane mentioned above continued from MX to EX, and well done to them.

 

[OpaTsupa]

Update: It looks like they are all in Estonia.

Hard Enduro World

I Do Hard Enduro Never saw before so many Stark Varg in an Hard Enduro Competition !!! And all Bikes who made it in the Semi Finals made it into the Finish !!! Stark Future #starkvarg #hardenduro...

www.facebook.com

 

[OpaTsupa]

Not sure where else to post this so it may as well go here.

Eddie Karlsson’s Factory Stark Varg EX – His Hard Enduro setup

[40hp / 80 regen]

 

[RCard42]

So I had a few minutes at work and geeked out a bit. These are results taken from the stark app on my last 12 rides. First of all the distance is not accurate. When I track mileage on my watch it is typically 2X what the app says. So there is a corrected column for charge%/mile. I threw in a median because there are some outliers in the data. Oddly, total miles logged on the bike seems to be an accurate number, but not when displayed on the individual rides in the app.

TLDR is the data is showing I can ride for ~2.5 hours and ~35 miles on a full charge. 50+ B rider switching between 30 and 40 hp, 50% regen most of the time; hilly, tight singletrack. That jives with my average speed logged on my watch of 14mph on this terrain.

Data is far from perfect. Did I stop to pee or move a log while bike was still logging? Probably happens most rides. One of these days I'll ride from full charge to 0 and see how that agrees.

I had to do all this manually, if anyone is aware of a feature within the Stark app I'd be interested in learning about it.

 

[happyinmotion]

Ok, geek time. I've been recording every ride and every charge for my series one MX, over 160 hours of riding and 98 rides.

I though that terrain would make a huge difference. It does.

Rides round here tend to be:

Hardpark - gravel forest roads and fast trail rides​

Mud - slippery sloppy bush​

Sand - as much shingle as sand, pretty loose stuff​

I've normalised each record to estimate what the range would have been if I kept going until the battery was at 10%.

Terrain type	Number of rides	Average distance to 10%, kilometres
Hardpack	18	56
Mixed	23	50
Mud	24	41
Sand	33	35

So yeah, sand is hard on the battery. Mud doesn't help.

And some simple correlations to the conditions:

Terrain Type	0.64
Average speed	0.24
Height	0.67

Average speed isn't affecting range much, but that could be coz even when I'm going fast I don't ride that fast.

Height climbed matters as much as terrain type. Basically, any time where you're on the throttle and not making much distance from that is going to hurt range. That could be ploughing through deep sand or mud, it could be coz you're dragging all that weight up a hill.

Highest range I've managed was 61 km on twisty forest roads, average speed 24 km/h. Got home with 6%.

 

[OpaTsupa]

Barman, a round of drinks for the data collectors over there in the corner.

 

[happyinmotion]

Barman, a round of drinks for the data collectors over there in the corner.

Thanks, we're too shy to buy our own drinks.

 

[Erwin P]

Keep in mind there is a lott of "sand". Loose water like white sand. Clay'ish yellow sand, deep and lumpy "black"/brown sand. All those vary greatly on battery use.
A funny thing i found is that having lower power modes like 35hp actually use more charge than 45-60hp. Having more direct power quicker gets you "surfing" on the sand and using way less power than try to shove and push it.

Here i have another video on my MX. Those 5 minute 2.67km laps take 6% battery. That gives you 16.7 laps/40km/1:24 hour.
The surface was mostly loose sand on top and harder brown sand underneath.
These numbers are consistent with what i see in my CrossCountry races.

 

[Chaconne]

Thanks, we're too shy to buy our own drinks.

You guys don't seem all that shy with all those ladies...NOT.

 

[OpaTsupa]

Those 5 minute 2.67km laps take 6% battery. That gives you 16.7 laps/40km/1:24 hour.

Nice track.
In your experience, is the battery drain at all linear?
I guess it can not strictly be so even in a static test.
For example: can you expect to cover similar distance from 60% to 50% as from 30% to 20%?

 

[Erwin P]

I have seen quite similar results over a full battery. Although the first few procent drain faster from 97-15 has been quite linear. In the 2 hour races there are long laps that drain 13% with a range of 12-14% per lap. I would say that's pretty linear.

 

[markhamr]

My battery only lasts 32 minutes if i try to ride fast?
and drops off power even earlier.
(set on the 60hp setting)
I am not into trials riding.
I have burnt through 12 percent of battery in one lap on a outdoor mx track.
Maybe there is something wrong with my bike apart from the obvious.
I can make it last a lot longer but it compromises speed.

 

[Chaconne]

My battery only lasts 32 minutes if i try to ride fast?
and drops off power even earlier.
(set on the 60hp setting)
I am not into trials riding.
I have burnt through 12 percent of battery in one lap on a outdoor mx track.
Maybe there is something wrong with my bike apart from the obvious.
I can make it last a lot longer but it compromises speed.

What are you using for regen? Are you riding it like a 2T? If so, tune it more like a 4T.

 

[Marshall G]

10 will get you 5. For aggressive trail riding with regen set to 50% or more, every 10% of battery will get you about 5 miles. So 100% = 50 miles ish. There, simple.

 

[Erwin P]

My battery only lasts 32 minutes if i try to ride fast?
and drops off power even earlier.
(set on the 60hp setting)
I am not into trials riding.
I have burnt through 12 percent of battery in one lap on a outdoor mx track.
Maybe there is something wrong with my bike apart from the obvious.
I can make it last a lot longer but it compromises speed.

Have you done all the updates? Especially on the early'er models we've seen quite the upgrades in range with some of the updates. Also makes for a smoother bike (hence using less power i suppose).

I have found that regen braking makes little extra range in the sand. When using less regen it often even comes further as you carry more speed IF you don't brake it all away with the hand brake.

Most of my range tests and longer races do incluide some form of mix between MX and Enduro. On an faster MX track with lots of sand i drain it in 40-45 minutes. But as said i'm not that fast of a rider. I can see how a faster one could drain in say 35 minutes there.

However i think a lott of former ICE riders can gain a lott of range from riding it like an E bike. I see a lott of wheelspin that ICE riders (unconciously) use to keep the motor spinning and on the power, the Stark doesn't need that and different more flowing corner techniques do apply. Also you want a rear tyre that has as much grip as possible. On a scoop tyre my battery use is significantly lower than a knobby on a sand track.
A spinning back wheel is the enemy here.