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  1. S

    Sur Ron Ultra Bee

    Wondering if anyone (other than EBMX) has done an Ultra Bee controller swap yet. I'm due to get another Nucular 24F and will have to come up with the wiring harness connectors.
  2. S

    Sur-Ron - New Mid drive Bike

    Downside to the Storm Bee is a used Alta is better, lighter, and cheaper.
  3. S

    Sur-Ron - New Mid drive Bike

    Gotcha. You're just looking for a LB 2.0 :) I suspect the Ultra Bee motor will take a much higher peak. I'm running 18kW+ peak on my LightBee and I know it's days are numbered. If truly thrashing it, the LB motor goes into temp shutdown too. The peak isn't so much the problem its the...
  4. S

    Sur-Ron - New Mid drive Bike

    How? The extra capacity alone would be 20#+ adder to a light bee. Doubling the motors power isn't a free lunch either. I have one on order already. Anxiouslly awaiting the chinese new year celebrations to wrap up for things to get rolling again. I *LOVE* that it has a bigger frame, better...
  5. S

    Sur-Ron - New Mid drive Bike

    Handy 3-n-1 machine and very nice optical(?) table. The spark is the inverter's bulk filter capacitors charging up. You need to precharge them or use something like an anti-spark connector (AS90) to do so. Fuse your battery connection as close to the battery as practical. That MPPT has to...
  6. S

    SURRON LB: RESEARCH & DEVELOPEMENT

    I've seen some folks take their motors apart to upgrade wires or spray the laminations to stop rust on youtube. But anyone ever 'pot' the windings? Should be able to add a thermal potting compound to help the windings get heat out to the housing. Likely make the thermistor read faster and...
  7. S

    Sur-Ron - New Mid drive Bike

    Got it! Where did you find a 60-70V MPPT and inverter? 12/24/48V are pretty common but not higher LiPo voltages. Edit: The SurRon BMS open circuits when it reaches full. You're going to have to be really careful if running an inverter from it also.
  8. S

    Sur-Ron - New Mid drive Bike

    MPPT charges your storage battery. In my case thats a 24V pack. (I could also theoretically charge this from the vans alternator when its running using a converter.) For the sake of discussion here, once the energy is in the storage battery it doesn't really matter how it gets there. Inverter...
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    Sur-Ron - New Mid drive Bike

    Understood (for your "computer and Starlink"). Just saying there may be a more efficient charge method if you ever need to go that route. I'm in the business and bought one of the higher eff inverters (Cotek.) I only have ~500W of solar on the van and ~5kWh of storage. Trying to run...
  10. S

    Sur-Ron - New Mid drive Bike

    Anyone know what the X160 battery pack BMS current limit is? Put a Nuc24F on the kiddo's bike and am figuring it out experimentally :) Was tripping on me going up a big hill riding at a friend's house. I don't have a hill that big around here to tweak it further. 3DTOPO: FWIW, the Nucular...
  11. S

    Nucular electronics - complete kit for ev!

    Has anyone setup a Segway X160 before? (= a SurRon w/ slightly narrower motor rotor/stator and 48V battery.) I already have a Nuc24F on my SurRon and LOVE it! So ordered another over a year ago to put on the kid's X160. I got it around the start of the year and finally got around to...
  12. S

    Sur-Ron - New Mid drive Bike

    I would think a steel (ferrous) ring wound be better. Blocks stray flux from the rear and the rear flux linkage will make the face field stronger/more defined.
  13. S

    Sur-Ron - New Mid drive Bike

    No. Axle to ground dimension is controlled by the radius of your wheel. These links change the geometry of the shock/swingarm/frame so that the static position of the frame is lifted relative to what it was before. They can also change linkage travel/force ratios.
  14. S

    Sur-Ron - New Mid drive Bike

    I treid contacting Litespeed multiple times. Calls and email. They went radio silent. :( Anyway, think I finally found it. AliExpress had 335mm (flat dimension) polyolefin. From my measurements (battery is 140x160mm), I need about 300mm so that must be the stuff. All I could find before...
  15. S

    Sur-Ron - New Mid drive Bike

    It works fine and fits. Just looking to repair the packs.
  16. S

    Sur-Ron - New Mid drive Bike

    There are a lot of battery builders on here. Where do you get the huge heavy duty heat shrink to wrap the pack in? I have a friend w/ a water damaged SurRon Litespeed battery that he'll need reassemble once he replaces the BMS and some cells. My Litespeed battery is also has a manufacturing...
  17. S

    Sur-Ron - New Mid drive Bike

    I run the SR241s and TuBliss rear. Trials tires will hook up on anything as long as they aren't packed w/ mud. Love the heck out of mine on the rear. Not as big a fan on the front. I originally put it on there to use the SurRon for the scout laps at Trials events - maybe even try to use it...
  18. S

    Sur-Ron - New Mid drive Bike

    A 3.5" SR251 is a *TIGHT* fit. You will have to dish the wheel a lot. That MX33 is even wider. You're going to need to shave the right side knobs off. Why not a 19" rear? Any MX tire will be avail in that size (of course) and the SR251 is also avail in 19s.
  19. S

    Sur-Ron - New Mid drive Bike

    I think it goes almost 50mph w/ my setup. The larger wheel diameter and sprocket somewhat cancel each other. The 72V battery ups that by ~20% and field weakening w/ the Nuc 24F can take it even farther if enabled. I never go that fast on single track. My rear tire is prob 10% taller than...
  20. S

    Sur-Ron - New Mid drive Bike

    I have a 21/19 setup (real MX rims, not the OEM 19" rim.) A wide 19" tire is as tall as a 21" tire so it keeps the bike level. I don't think you can get an 18" tire w/ a diameter as large as a 19". Not one that will still fit inside the swingarm at least. So, yes, I think you'd need a rear...
  21. S

    SURRON LB: RESEARCH & DEVELOPEMENT

    '21 Freeride E-XC: 7160g dirty front wheel w/ 80/100-21 Michelin Starcross Med (unknown tube type) The rotor is considerably thicker. 4.1mm vs ~1.75mm. The spokes are a lot beefier too. The hub, while beefier than a 20mm TA bike hub probably isn't all that heavy. It's still pretty small...
  22. S

    SURRON LB: RESEARCH & DEVELOPEMENT

    My wheel: 2250g = Pro Wheel Racing 70R 1.60x21 36H laced to Origin 8 hub, 12g Sapim spokes (no disc) 3315g = Shinko SR241 2.75x21 (meas ~27" tall, 3.125" wide @ knobs) 6490g = total w/ an HD tube (still no disc) The Freeride E-XC uses basically the same front end he has. SX85 forks (travel...
  23. S

    SURRON LB: RESEARCH & DEVELOPEMENT

    Litespeed 72V 32Ah molicell 21700 batt is 373mm tall. The cables glands sticking out the top are taller.
  24. S

    Sur-Ron - New Mid drive Bike

    I put a Kenda 760 on the rear supermoto 17" rims w/o a problem.
  25. S

    SURRON LB: RESEARCH & DEVELOPEMENT

    I don't think 75kg is achievable. A stock SR is about 55kg? fork: Fox40 2.8kg, CR85 10kg = +7kg wheels/tires: 8.8kg oem (no sprockets/brake rotors), ~14kg moto 21/18 = +6kg battery: oem 11kg vs your proposed 20kg = +9kg motor: oem ?kg vs QS 4kW 13kg = +? =77kg+motor and the frame isn't...
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