Stealth Bike Specs and Modding Questions

[wardrop]

I researched electric bikes probably just under a year ago, and I came to the conclusion that buying something pre-assembled was the go for me, as modding standard downhill bikes with torque arms etceteria, is beyond what I'm willing to take on. The Stealth Fighter is the only off-the-shelf e-bike I'd consider. They look awesome, they're well design/packaged, and they're reasonably priced I believe. I do however have a few technical questions regarding the Stealth bikes, more specifically, the Fighter and Bomber (not interested in the pedal-less Hurricane).

First, I'm hoping someone can tell me the following for both the Fighter and Bomber:

• What type of hub motor is in it, and does anyone know it's maximum rated voltage/amps (e.g. total safe wattage).
• Same question, but relating the speed controller. What's it's maximum power handling?
• Why does the Bomber weigh 20kg more than the fighter? Where does the extra 20kg come from?
• How wide is the frame along the top-tube? I want to know so I can simulate it's width on my current bike to see how much I'll have to change my riding style to avoid bashing my knees.

Now, I want to know what I can do to these bikes if I ever want more power. Battery upgrades are fairly trivial, it's a matter of ensuring the battery cavity can fit them, and ensuring they're wired for the appropriately to achieve the best voltage/amperage combo. But, and this relates to my previous questions, could I get any extra power out of the stock speed controller and motor without damaging them? I saw mentioned in the comments of a Youtube video that someone managed to get their Stealth Fighter up to 7kw (http://www.youtube.com/watch?v=ewv-GmB_3jQ). Would anyone know how they may have done this?

Thanks in advance!

 

[wardrop]

No one knows? Or did I post these questions in the wrong forum?

 

[Willow]

check out this thread http://endless-sphere.com/forums/viewtopic.php?f=6&t=23996

You can trick them up, give em' more power, more volts etc. quality machines for sure.

 

[remf]

They're Crystalyte motors, not sure what they're rated to but a few here have overvolted Bombers up to 10 kW or more. Fighters have been overvolted to 7 kW or more. You'll obviously need a higher voltage pack and something like a Lyen controller. The Bomber weighs 20 kg more due to the heavier motor, battery, V-Boxx and other components. Frame width on my Bomber is about 4x that of my mountain bike, Fighter is 3x as wide. I think when I rode the Bomber for the first time, I knocked my knees about a lot. You adjust very quickly and automatically.

Check out the E-S Stealth Owners thread as well as Hyena's. Best to post questions there, excellent info in both places.