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  1. E

    Observed trials bike designing

    Yeah I have a feeling it's functionally just adjustment to spindown / spin up time, and I doubt it will perform well in either of the situations you describe. No clutch, it's a single speed, so a splat style clutch dumb is totally out. But we'll see when it shows up! Hahaha yes, the issue is...
  2. E

    Observed trials bike designing

    I'll have a Stark around soon (going to a friend) and I'm curious to see how their "virtual flywheel" concept works out in application. I have noticed that this is one of the hard things about the EM - the flywheel spins up FAST and it is hard to modulate. It also spins down very fast, we'll...
  3. E

    Observed trials bike designing

    I think there's something interesting here about both flywheel and clutch design that I haven't seen made explicit, that is pretty unique to what trials demands. You have two controls (throttle and clutch) that are used to interact with the RPM state and the rate of change of the RPM of the...
  4. E

    Enduro with a Clutch and Transmission

    Alright, well, wasn't super happy with how the old project was going, so did some work and got the EM ePure Race motor in the 300, at least enough to pop around the yard a bit: Things remaining to do are: Weld on lower rear motor mounts Get the lower mounts done in aluminum Design some armor...
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    Enduro with a Clutch and Transmission

    If you'd like to see the E-moto in (very light) action: Conan Dooley on Instagram: "First ride on the E-moto, need to finish up armoring, battery mount, and get all the plastics and such on it. Chain might have stretched enough to fit the qs 138, will just have to see. So much mechanical noise!"...
  6. E

    Enduro with a Clutch and Transmission

    Drive chain showed up today, and I did a quick spin on it. The electric motor configuration is too soft off the bottom when you have a clutch, it doesn't feel very responsive. Also probably want to turn down the regen. It needs the bigger motor for sure, although aggressive clutch use works okay...
  7. E

    Enduro with a Clutch and Transmission

    I've got a fully enclosed chainrun with delrin sliders now - swapped the QS120 on, remade motor mounts. Might need to go to a 520 instead of the 428 that it came with. That'd also open up some other options for gearing. I can adapt the delrin setup to have a spring loaded tensioner on it...
  8. E

    Enduro with a Clutch and Transmission

    If I were to swap the QS120 in with an EM-100 controller, how high could I reasonably turn up the controller Busbar current without worrying about frying the controller / motor? My use case is different from most, cause I have a clutch, so I'll tend to slip the clutch at lower RPM to bring motor...
  9. E

    Enduro with a Clutch and Transmission

    I got the cases sealed up, and the upper motor mount fabbed up: Following that, I discovered something pretty disappointing - the placement of the electric motor + crank sprocket is such that I'm perfectly between the link sizes on the chain. Need a half link in 428, because I welded on the...
  10. E

    Enduro with a Clutch and Transmission

    Things slowed down a bit, but still making forward progress. I did temporarily get the motor running just to make sure everything works, so a short clip of that is available on my Instagram if you'd like to see it. This build is a bit more slapped together / rough, but I'm not entirely sure the...
  11. E

    Enduro with a Clutch and Transmission

    Managed to make some good progress after work today! Split the cases: This Motion Pro crankcase splitter is very expensive but also a wonderful forever tool. No conrods allowed: If you don't want to retrue the crank, just angle grinder the conrod off. Welded the crank up, as a 2 stroke...
  12. E

    Enduro with a Clutch and Transmission

    Thanks, it's really nice to hear the support for a different approach! I'm not broadly concerned about gearing. The QS138 does about 4k RPM without flux weakening, and up to 6.5k or so (iirc) with flux weakening, and the rev range the 2 stroke uses is about 2-5k under normal usage, so it should...
  13. E

    Enduro with a Clutch and Transmission

    Thank you! No time to work on it tonight, but tomorrow I'll hopefully have some time to split the cases and do the welding needed.
  14. E

    Enduro with a Clutch and Transmission

    Thought this forum might appreciate my build. I've got KTM dirtbike that I'm converting to electric, retaining the clutch, transmission, and original crank. I've been through a few iterations in different frames, but the right call here ended up being my 2011 KTM 300 XC. Today I finally had the...
  15. E

    Observed trials bike designing

    DanGT86, a modern multiplate clutch in a supersport will easily take ~200+hp for tens of thousands of miles, including aggressive launches and the like - wet bath multiplate clutches on modern motorcycles are pretty absurd in terms of the abuse they'll take. MotoGP bikes only have a single...
  16. E

    Observed trials bike designing

    For what it's worth, having put a good amount of time in on a Brammo Empulse, a clutch drop on that bike is completely pointless. There's zero rotating mass behind it, the clutch is only there so you have a way to smooth out shifts, if you need it (it shifts fine without it, due to the lack of...
  17. E

    Observed trials bike designing

    Yes, your understanding of the design is correct. I may have to do some weighting of the rod pin to keep the crank roughly balanced, but given that it is captured between two bearings, I don't think it'll be a huge deal. I'm hoping the weight penalty will be sub-30 pounds to start, as the...
  18. E

    Observed trials bike designing

    Hey all, appreciate all the conversation and back and forth here. I've had the luck to own a number of electric bikes - OSET 24.0, KTM FreeRide-E, and an Electric Motion Epure Race. I've got a pre-order in on a Stark Varg, that I'm likely to cancel, because it doesn't have a clutch. I've also...
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