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  1. K

    Solid tires?

    I'd say a foam insert such a Cushcore is worth a look. Takes up at least half of the internal volume, adding bottom-out protection and run-flat properties. More of a MTB based device, but could help here too. You run tubeless with sealant in the outer air chamber, which could prove more reliable...
  2. K

    Your Ride Videos!

    Yep, you got it! Maybe we should do a ride sometime, I never see any other custom or high powered e-bikes around :)
  3. K

    Best general purpose pavement tires ?????

    I've used the flame tire and it's ok. Nice volume and a thick "tread" area, super thin sidewalls.. but my main issue with them was the very square profile. Sucks for cornering and leaning hard. Check out the Felt Thick Brick, or 3G Boa-G 3" tires. Nice round profile on them.
  4. K

    Hardtail, On/Off-Road - 4.2KW - First Build

    Hey rider. What's the problem exactly? I ride mountain bikes extensively, do a lot of extreme off-roading and downhilling. I also have a 250cc KTM 2 stroke dirt bike. So I have a lot of experience even with a motorized bike already before I built this. I also have a lot of experience building...
  5. K

    Your Ride Videos!

    Nice vids y'all. Here's a quick little compilation of clips I put together. Impressed with the image quality from my new phone! HWre2IkoOFM
  6. K

    Hardtail, On/Off-Road - 4.2KW - First Build

    Thanks Ellou... I hope you have at least half as much fun as I'm having, cause that'll still be a lot! Made a video! Here's the machine in action: https://www.youtube.com/watch?v=HWre2IkoOFM&feature=youtu.be
  7. K

    Hardtail, On/Off-Road - 4.2KW - First Build

    Hey ES folks! About time for a little update on this bike I suppose. I've done about 4000km on this bike now, and commute with it every day that isn't raining hard! My quality of life has greatly improved. No more sitting in traffic, inside a closed box staring at other boxes. I zoom down the...
  8. K

    Which tyres to replace my hookworm 24 x 2.5's?

    Check out the 3G Hoggy-G. Claimed 3.45" but really only a ~2.8" on a 30mm (inner) rim. Great tire, lots of grip and stability even on loose surfaces. Pretty solid down to 17-20psi on my bike. Felt Thick Brick, another good high volume option. Haven't tried mine yet, but same casing as the...
  9. K

    OK...noob q...where's the power go during hard coasting?

    On my H4060, when I reached about 65kph on a downhill my CA reported regen current without actually activating regen with the e-brake. Think it was only about 50-100w, and probably had the throttle open.
  10. K

    What makes good brakes? Pistons, rotor or feedback?

    I was using the m595 (slightly older deore model, probably about the same as the m615) on the front of my 55kph 90lb ( +160lb aggressive rider) ebike for quite a while. Sufficient, but not quite enough for my liking. Never had any fading issues, but just not enough power. Was never able to even...
  11. K

    Help with New Tire Selection

    Take a look at some of the offerings from Vee, they're great value. I've been using the vee fluid 26x2.5 on the front of my ebike for a few thousand KM's. Lots of rocks and trails, and pavement. Corners amazingly well on pavement for a knobby, nice volume, 120tpi casing so it's very supple...
  12. K

    What makes good brakes? Pistons, rotor or feedback?

    I also highly recommend the zees for performance to price ratio, just fantastic brakes, for only $150 per wheel at CRC. As chalo said sintered is generally the best power and least fading, best in wet conditions, and in fact like to be heated up some to achieve full power. An interesting...
  13. K

    Shimano cassette remover that fits over hub motor shaft.

    I had this same problem with my ACS freewheel remover. Hardened steel.. you can remove the harden by heating it up red hot with a torch and then letting it cool slowly. I did this, then hand filed it down enough to work. Pain in the ass and took some effort, but it worked. A dremel would be a...
  14. K

    What makes good brakes? Pistons, rotor or feedback?

    It's strange with MTB brakes it seems more pistons = better generally, more power, more modulation. But then I look at my 2006 KTM 250 brakes, there is only one very large piston per caliper. However, I have a value oriented but high quality DH brake on my ebike - the shimano zee and it's...
  15. K

    Is my wheel going to explode?!?!

    I built my 4.2kW ebike with 12ga spokes on the rear. I'm light only 160lbs, but I ride hard, off-road at times and my bike is a hard tail. I run low tire pressures, and I've bottomed the tired on curbs at least a dozen times, one time I power wheelied into a curb accidentally. Nothing broken...
  16. K

    spokes loosening

    Interesting. I keep hearing that anything bigger than 14Ga is worse in terms of reliability... but why do normal motorcycles use thicker spokes? There is obviously much more stresses at play on an ebike, maybe even more than on some of the extremely ridden downhill mountain bikes which of course...
  17. K

    Ebike finally died, need help finding out why

    Ok... so. I have the sense harness completely unplugged from the BMS, and it still read 75.5-75.6 volts from it. I put the resistor across that, and the voltage read as 1.7V. Then I measured again without it and now it's 75.7V, so it went up 0.1V after that.... if that means anything. Is it...
  18. K

    Ebike finally died, need help finding out why

    Suppose one couldn't. My sense harness connectors definitely won't reach outside the box, so... what tests would even require the BMS to be removed completely? I could remove it to take pics at least, if necessary.... seems I'm just going to have to replace it or run without it though.
  19. K

    Ebike finally died, need help finding out why

    Okay, it just seemed like it would be simpler to hook up the resistor to my connectors than a light bulb. They're cheap at a store close by, so... I should be able to remove the BMS from the box easy enough by unplugging everything from it.
  20. K

    Ebike finally died, need help finding out why

    Yeah maybe that's the case... that was a while ago before this happened, exploded my bullet connectors. I was also told by the headway support that it is not an actual BMS as it doesn't balance constantly, only at the end of charge, so it's a PCM. Maybe that makes no difference in this case, and...
  21. K

    Ebike finally died, need help finding out why

    Right, but I tested each cell through the BMS's sense harness... and they all tested fine to be a proper voltage, wouldn't that mean every sense wire is getting a good connection? Thinking this may be it... probably have to pull all the cells out and check for loose screws, pain in the ass...
  22. K

    Ebike finally died, need help finding out why

    Okay ! So I tested every individual cell voltage, and they are all within 0.1v of eachother, all 3.2-3.3V. So seems the battery is okay. So what else could be wrong with the BMS to cause the 4V drop? Here's some pics as requested
  23. K

    Ebike finally died, need help finding out why

    I think it is the BMS. I disconnected my accessory harness (fuse, keyswitch, charger port) and measured the voltage just from the main battery POS out and BMS neg out, and the voltage reading was the same low reading at 75.5, while still 79.5 at the cell ends. So I tried to measure the...
  24. K

    Ebike finally died, need help finding out why

    Seems like a connection issue.. probably try deeper inspections before trying a BMS bypass? Hmm, a diode tester.. I could try that I guess? Could a multimeter be used instead? I did try some mosfet testing already as well. I do think the differing voltages are a good clue here. Yes I...
  25. K

    Ebike finally died, need help finding out why

    Hello folks. So I come today with a problem. I built my first ebike several months ago, and have done almost 3000km on it so far without major issue, until it just died this week. The controller won't power on. Some specs: - Headway 15AH 24S battery - 24S Headway BMS / PCM...
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