E-S Stealth Electric Bike Owners

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Trelos   10 mW

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Re: E-S Stealth Electric Bike Owners?

Post by Trelos » Nov 06 2019 8:07am

CJonaBttlrckt wrote:
Oct 27 2019 6:28pm
Rix wrote:
Oct 26 2019 9:35pm
CJonaBttlrckt wrote:
Oct 25 2019 8:57am
Hi folks
Question...are there any other owners of the current model bomber (96v & UFO motor) experiencing repeated controller and less frequent DC1 failures?
Cheers
Tell us what you got going on?
Hi Rix and all,
On my recommendation, early last year my friend picked up a new bomber, coincidentally one of the first with the UFO motor.
It's a very fast bike..too fast I'd argue and I do wonder why stealth seem to go for speed over torque...anyway, that's an aside!

The bike is now on its fifth or sixth controller, including two sine wave controllers, and its second or third DC1.

Typically in two to four months it seems to cook the controllers and who knows what it's doing to the DC1.

After the first few normal replacement controllers stopped working, stealth sent two sine wave controllers.
The first sine wave just stopped working, saying 'cannot connect throttle' and the last sine is now overheating too quickly.
The replacement normal controller for this overheating sine wave controller overheats in minutes and is un-rideable, so he is planning to go back to the overheating sine wave so he can at least ride it for now!

I have been reluctant to post about this previously thinking stealth would fix and also I thought if there was someone else having the same problem, they would post about it.

My friend is otherwise very happy with the bike...though he is at times ready to ride it off a cliff!

Incidentally, at the same time another friend also picked up a fighter and it has been generally trouble free!

Cheers
Hi
Your overheating problem may well be the size and weight of your rear tyre, and is that also a heavy duty rim and spokes ?
24 fet might be the answer. :bolt:
Stealth bombers , fighter , turbo levo , its a lifestyle !

Theodore Voltaire   1 MW

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Re: E-S Stealth Electric Bike Owners?

Post by Theodore Voltaire » Nov 06 2019 12:34pm

Trelos wrote:
Nov 06 2019 8:07am

Hi
Your overheating problem may well be the size and weight of your rear tyre, and is that also a heavy duty rim and spokes ?
24 fet might be the answer. :bolt:
Probably not. From my experience Stealth builds a lot of extra reserve potential in their bikes. A lot of Stealth owners have installed larger rims on their bikes without problems. I have 65mm double wall rims, plus I maxed out my ca at 65 amp, up from stock 60 amp, and my bike hasn't experienced any problems even riding in 100 plus ambient temperatures in Texas.

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Rix   100 GW

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Re: E-S Stealth Electric Bike Owners

Post by Rix » Nov 06 2019 3:47pm

Theodore Voltaire wrote:
Oct 28 2019 7:07pm
Image

Since graduating from professor Rix rebound class 101, I decided to go out into the world and make my mark.

Turning the knob all the way fast took 28 clicks from where I was. This resulted in a soft feeling ride, but the bike would pogo after a bump. It would compress, rebound fast, compress again, and rebound a final time. The rear wheel would move up, down, up, down.

I added 14 clicks in the slow direction. That made a noticable difference, now it would compress, rebound, and compress. The wheel moved up, down, and up. Only 3 moves instead of 4.

I added 3 more clicks slow. That made it compress, and rebound, and only a slight trace of down. call it 2 1/2 moves.

I added 3 more clicks slow. Then all it did was compress, and rebound. Rear wheel went up, and down. Almost prefect, but it felt firm.

I went back toward fast 1 click from there. Now it's perfect. The rear wheel compresses, and rebounds 1 time.

It's now 9 clicks fast from where I started. The difference is, the rear wheel moves about the same as before, but the ride feels softer now.

I would of had a hard time figuring this out on my own, because I didn't think rebound damping had this kind of effect. I thought the compression damping did this.
Glad you got your bike dialed, if you did a lot of offroad riding/racing, you would have figured it out, or you would have been the King of going over the bars and crashing.

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Rix   100 GW

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Re: E-S Stealth Electric Bike Owners

Post by Rix » Nov 06 2019 4:03pm

CJonaBttlrckt wrote:
Oct 28 2019 2:53pm
Hi again and thanks Rix,
Sorry, it would b 92v.
Going off memory!

Our assumption has been failing fets.

So higher voltage fet controller required.

Thanks again
Cheers
Clinton
Is your friend heavy? Barring any issues such as an intermittent short somewhere, it may be an inductance load issue causing the problems. I knew one guy here who was blowing controller on a Bomber, but he was very heavy, (300 pounds) and had the skills to ride the bike hard and fast. Consequently after replacing his controller and going with a custom 20s battery (84volts hot) he never had another problem. Said that to say this, if you are sure there is not something externally causing the controller to fail, and your friend is a big guy, going to a higher voltage rated controller with 4115 fets will most likely solve the issue.

Theodore Voltaire   1 MW

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Re: E-S Stealth Electric Bike Owners

Post by Theodore Voltaire » Nov 06 2019 4:29pm

My bike is 6 yrears old this month. 12,591 miles. Here's a list of all failures I've had.

1. RH swing arm bearing. $16

KarlJ   100 W

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Re: E-S Stealth Electric Bike Owners

Post by KarlJ » Nov 07 2019 5:38pm

SZXJR store Aliexpress 11A 92.4V charge arrived! https://www.aliexpress.com/item/3289879 ... 4c4dNNvQqa

Well given my stock charger vs new battery at 2700Wh was a slow exercise I bought one with more grunt from aliexpress.
Took 5 weeks to arrive and does not have trim pots to adjust the voltages, all controlled by a little board hence will be simply keeping a close eye on it and only charging to 90V to save the controller going bang.
It is about the same size as the stock unit but makes less than half the noise and barely gets warm vs the stock charger.

Carbon fibre sheets arrived for the side panel inserts - they are a little shorter than the stock pieces, easily cut with an angle grinder with a cutoff wheel.
https://www.aliexpress.com/item/3297950 ... 4c4dNNvQqa
See attached pics - i'm not one for counting the KGs but at 108g the pair vs the stock side covers which were >250g each (cant tell you how much they weigh as my little scales only read to 250g.

I was highly impressed, looks like prepreg to me, weave all nice and straight used 5 min epoxy to glue them on after a quick scuff and clean - the old covers practically fell off as carbon fibre sticky tape over aluminium.

Last but not least Upgraded the charger port to powercon type and converted the two chargers and the stock charge port, I was going to make a two into one adapter so i can charge it at ~17A but the small wires from the stock port will need an upgrade and I didnt have the correct wire size on-hand, a later job. https://www.ebay.com.au/itm/3X-1-set-Po ... 2749.l2649
Attachments
IMG_4456.pdf
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Rix   100 GW

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Re: E-S Stealth Electric Bike Owners

Post by Rix » Nov 07 2019 9:31pm

:lol: :lol: I didn't even have that, I had a seat triangle failure and it was promptly replaced under warranty. Thats it.
Theodore Voltaire wrote:
Nov 06 2019 4:29pm
My bike is 6 yrears old this month. 12,591 miles. Here's a list of all failures I've had.

1. RH swing arm bearing. $16
Last edited by Rix on Nov 08 2019 2:25pm, edited 1 time in total.

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Cowardlyduck   100 MW

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Re: E-S Stealth Electric Bike Owners

Post by Cowardlyduck » Nov 08 2019 2:27am

Theodore Voltaire wrote:
Nov 06 2019 4:29pm
My bike is 6 yrears old this month. 12,591 miles. Here's a list of all failures I've had.

1. RH swing arm bearing. $16
If I did that it wouldn't look pretty. Good thing I can't be bothered.

Cheers
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st35326   100 W

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Re: E-S Stealth Electric Bike Owners

Post by st35326 » Nov 08 2019 2:35am

Theodore Voltaire wrote:
Nov 06 2019 4:29pm
My bike is 6 yrears old this month. 12,591 miles. Here's a list of all failures I've had.

1. RH swing arm bearing. $16
Thats incredible. Are these not the most high quality Ebikes you can get?

Theodore Voltaire   1 MW

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Re: E-S Stealth Electric Bike Owners

Post by Theodore Voltaire » Nov 08 2019 3:57am

st35326 wrote:
Nov 08 2019 2:35am
Theodore Voltaire wrote:
Nov 06 2019 4:29pm
My bike is 6 yrears old this month. 12,591 miles. Here's a list of all failures I've had.

1. RH swing arm bearing. $16
Thats incredible. Are these not the most high quality Ebikes you can get?
Plus fastest

RhombusB52   100 µW

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Re: E-S Stealth Electric Bike Owners

Post by RhombusB52 » Nov 08 2019 3:54pm

Theodore Voltaire wrote:Here's an exclusive, just for us, first look from inside the secretive biknut skunk works of my new Fox Dropper external 4" seat post. Not fully installed yet, lacking the cable, and lever. This is all the way down. Not quite as low as I would like, but haven't tried it yet. I don't think you could use this post with a stock shock with remote reservoir, without the post sitting very high in the frame. The one in Rix link would definitely fit better, and best as I can tell, I'm not going to be able to use the full 4" lift with the seat sitting this high when it's all the way down.

Image
Nice job. Well done. Love those mudguards.!


Sent from my iPhone using Tapatalk

Theodore Voltaire   1 MW

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Location: Dallas

Re: E-S Stealth Electric Bike Owners

Post by Theodore Voltaire » Nov 08 2019 7:08pm

RhombusB52 wrote:
Nov 08 2019 3:54pm
Theodore Voltaire wrote:Here's an exclusive, just for us, first look from inside the secretive biknut skunk works of my new Fox Dropper external 4" seat post. Not fully installed yet, lacking the cable, and lever. This is all the way down. Not quite as low as I would like, but haven't tried it yet. I don't think you could use this post with a stock shock with remote reservoir, without the post sitting very high in the frame. The one in Rix link would definitely fit better, and best as I can tell, I'm not going to be able to use the full 4" lift with the seat sitting this high when it's all the way down.

Image
Nice job. Well done. Love those mudguards.!


Sent from my iPhone using Tapatalk
Thank you Rhombus, I've tried several versions over the years, and these are the best yet.

If anyone wants to make fenders for their bike I'm happy to share where I bought the hardware.

KarlJ   100 W

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Re: E-S Stealth Electric Bike Owners

Post by KarlJ » Nov 09 2019 12:51am

Today I made up a harness to connect the stock charger and the new 11A charger in parallel with the powercon connectors i bought for ~$7.5 AUD
https://www.ebay.com.au/itm/3X-1-set-Po ... 2749.l2649

Rather than mod the bike, I used a belt sander / linisher to reduce the OD of the powercon female end in the bike by around 1mm, it survived this will no ill effects and was a tight fit but the holes lined up to the ones drilled into the frame for fixing screws.

Nothing went bang when i connected everything together and I can now charge at 1500W with the two chargers combined, still less than the 0.5C the *std* charge rate for the MJ1 3500mAh cells 22S10P.

charged from around 30% SOC to 85% SOC the pack rose 1 Deg C from 42DegC to 43Deg C.

Pretty happy with those results and the el cheapo Powercon connectors are a HUGE improvement on the stock XLR which got very warm with even the stock charger 5-6A.

I really don't know how anyone tolerated the stock B52 LiFeP04 pack and its miserable 1200-1300Wh..... I'd be done in 20kms and very disappointed. Even the *NEW* 2000Wh pack from Stealth seems paltry next to DIY 18650 packs and despite mine only being 22S10P and 2772Wh max - call it 2500Wh at 90V / 90% and usable at 2kWh using 80% of the available should give a long lived unit.

Can't wait to build the next pack, just need to cover another 800x charge to 90% discharge to 20% cycles at 30kms a throw = 24,000kms

Now done almost 1500kms since ownership and will hit 4000kms total on the bike soon - enjoying every minute of it!

Lashed out and bought an MT5 front brake as still not happy with the feel on the OEM MT2 even after probike shop has had a couple of goes at it.
$150 from lordgun and a couple of sets of pads from ebay at ~$7/set, one ceramic and the other sintered to try, see if i can't get this thing stopping with some confidence.
I would have done the Shimano SAINT as recommended but as i'd need to do both ends for matching levers and it was a ~$5-600 exercise which is tough to justify for me ATM... (I'll regret that when it hit something )

Theodore Voltaire   1 MW

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Location: Dallas

Re: E-S Stealth Electric Bike Owners

Post by Theodore Voltaire » Nov 09 2019 10:10am

KarlJ wrote:
Nov 09 2019 12:51am

I really don't know how anyone tolerated the stock B52 LiFeP04 pack and its miserable 1200-1300Wh..... I'd be done in 20kms and very disappointed. Even the *NEW* 2000Wh pack from Stealth seems paltry next to DIY 18650 packs and despite mine only being 22S10P and 2772Wh max - call it 2500Wh at 90V / 90% and usable at 2kWh using 80% of the available should give a long lived unit.

Can't wait to build the next pack, just need to cover another 800x charge to 90% discharge to 20% cycles at 30kms a throw = 24,000kms

Now done almost 1500kms since ownership and will hit 4000kms total on the bike soon - enjoying every minute of it!
I heard that. I could suck my battery dry in 17 miles (27 Kms). Even my 24ah is still not enough. I'm starting to warm up to the idea of building my own battery pack next time.

KarlJ   100 W

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Joined: Feb 23 2014 7:01am
Location: Melbourne

Re: E-S Stealth Electric Bike Owners

Post by KarlJ » Nov 09 2019 6:43pm

[/quote]
I heard that. I could suck my battery dry in 17 miles (27 Kms). Even my 24ah is still not enough. I'm starting to warm up to the idea of building my own battery pack next time.
[/quote]

piece of cake! , cant wait to see your build

1abv   1 kW

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Re: E-S Stealth Electric Bike Owners

Post by 1abv » Nov 13 2019 9:22pm

KarlJ wrote:
Nov 09 2019 12:51am
Today I made up a harness to connect the stock charger and the new 11A charger in parallel with the powercon connectors i bought for ~$7.5 AUD
https://www.ebay.com.au/itm/3X-1-set-Po ... 2749.l2649

Rather than mod the bike, I used a belt sander / linisher to reduce the OD of the powercon female end in the bike by around 1mm, it survived this will no ill effects and was a tight fit but the holes lined up to the ones drilled into the frame for fixing screws.

Nothing went bang when i connected everything together and I can now charge at 1500W with the two chargers combined, still less than the 0.5C the *std* charge rate for the MJ1 3500mAh cells 22S10P.

charged from around 30% SOC to 85% SOC the pack rose 1 Deg C from 42DegC to 43Deg C.

Pretty happy with those results and the el cheapo Powercon connectors are a HUGE improvement on the stock XLR which got very warm with even the stock charger 5-6A.

I really don't know how anyone tolerated the stock B52 LiFeP04 pack and its miserable 1200-1300Wh..... I'd be done in 20kms and very disappointed. Even the *NEW* 2000Wh pack from Stealth seems paltry next to DIY 18650 packs and despite mine only being 22S10P and 2772Wh max - call it 2500Wh at 90V / 90% and usable at 2kWh using 80% of the available should give a long lived unit.

Can't wait to build the next pack, just need to cover another 800x charge to 90% discharge to 20% cycles at 30kms a throw = 24,000kms

Now done almost 1500kms since ownership and will hit 4000kms total on the bike soon - enjoying every minute of it!

Lashed out and bought an MT5 front brake as still not happy with the feel on the OEM MT2 even after probike shop has had a couple of goes at it.
$150 from lordgun and a couple of sets of pads from ebay at ~$7/set, one ceramic and the other sintered to try, see if i can't get this thing stopping with some confidence.
I would have done the Shimano SAINT as recommended but as i'd need to do both ends for matching levers and it was a ~$5-600 exercise which is tough to justify for me ATM... (I'll regret that when it hit something )
Karl,
I have gone down the exact path that you are. I never got the Maguras to work with confidence.I tried bleeding, I tried both ceramic and sintered pads and all I did was wear them out and the rotors with quickness. The stopping power and the lever feel was never to my liking. The levers traveled too much before initial bite. If you look on the thread there was some posts about how people did some mods to make the adjustment on the Maguras work better. When I switched to the Saints with the ICE rotors, from the first time I pulled the levers they were simply in a different league then the mt5's I had on my bike. I do 90% off road and a lot of steep up and down hills. For me having a bike that weighs as much as a bomber and also the ability to stop when and how I want justified the cost.. Maybe you will dig the pads but the Maguras didn't work out for me. BTW the saint rotors and pads last much longer than the Maguras for me. When Installed the Saints I did have to get some spacers for the rear to get them to fit. You can pick them up at a bike shop. They should have varied thickness spacers. Good Luck!

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