Search found 112 matches

by bikerpete
May 16 2022 6:40pm
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

It might take us back to the original problems. I guess I'm just thinking that if you allowed a current/torque ramp equal to or more aggressive than a gas motor you could just tame it with the clutch and see how it feels. We might be overthinking it. As for controllers, My gut feeling is that it wi...
by bikerpete
May 13 2022 3:33am
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

Perhaps a simple current ramp with a set rate of amps/sec that results in output equal to an ICE motor is the solution. Keep it simple and just save some cash for the clutches you plan to burn through. I wonder if Electric Motion would tell us what their throttle logic is like? :) Doesn't that just...
by bikerpete
May 03 2022 7:37am
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

This raises a couple of questions immediately for me, and I'll probably come up with more as I process it. 1. What do you think an "ideal" map would look like? Is it an inclined plane? A ridge running up and back? 2. How would a controller achieve the varying automatic load response of an...
by bikerpete
May 03 2022 7:20am
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

Using the clutch lever to switch modes could be valuable but simple speed throttle is pretty twitchy and accelerates an unloaded wheel violently. At least on high amp cheap older controllers. What about a speed+current throttle but program it extremely progressive so the first half of the travel is...
by bikerpete
May 01 2022 6:18am
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

I agree that the dyno and datalogging would be no small task. I guess I was thinking the primary purpose would be to figure out what the unloaded rpm acceleration rate of the ice motor is so you can copy it. I see that being the #1 challenge to getting the feel right. If a rider has the clutch pull...
by bikerpete
Apr 29 2022 10:51pm
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

Perhaps the key here would be to have someone do extensive dyno testing of an ice bike data logging as many things as possible including throttle angle. Then tune your electric motor/controller as closely as possible to match the torque ramp rate and hp profile of the gas bike. Match the rotating m...
by bikerpete
Apr 29 2022 8:18pm
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

Good points on the current vs speed throttle setups. Having a motor spin up to max rpm with just a touch of throttle is no good at all. Simply switching from current throttle when clutch pulled should allow for nice infinite rpm control settings as you decide via ramps and your wrist. You could als...
by bikerpete
Apr 29 2022 6:47pm
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

When I wrote "why not both" I only meant to suggest that an "E trials" competition should allows competitors to use either one. Throttle only or throttle plus clutch. Let the results show which works better. Ah, gotcha. My misunderstanding. They do & they have. Clutchless bi...
by bikerpete
Apr 28 2022 10:03pm
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

I haven't given up on the belief that a finely tuned controller with enough amps could obsolete a clutch but I am pretty convinced that a clutch is a way easier solution and way more familiar to most riders at this point. Id rather have one and not use it than realize at the end of a build that I w...
by bikerpete
Apr 28 2022 9:07pm
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

Absolutely not possible by throttle...So I ask, why not just put in a flywheel and clutch? Why not both? Competition improves the breed. If a certain configuration dominates a competition, so be it. It sounds to me that controllers and electric throttles need development and improvement. If there w...
by bikerpete
Apr 28 2022 2:11am
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

Having piqued my own interest I went out with a GPS on the bike a couple of days ago. 2nd gear not much over 15kmh 3rd gear high 20's 4th gear mid 30's 5th gear finally got over 50kmh 6th - didn't bother I could possibly have eked a few more kmh out of each gear, but the bike was really not too far ...
by bikerpete
Apr 27 2022 8:29pm
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

6 phase windings and dual controllers could be a suitable setup to gain on both issues. Bigger motors also. Not sure how the sevcon is setup to run the 2012 Polaris Ranger EV, but the "low" setting on the stock three speed switch acts just like a low gear. Need to dig into this a bit deep...
by bikerpete
Apr 25 2022 8:18pm
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

Picked up barely used Vertigo R2 300 in october. 68 kilos and 26Kw 52Nm @crank, what a petrol beast! By my calculations this translates to 1800Nm wheel @1st gear minus 3-4% for the gearbox and the chain drive losses. Clutch drops on the 2nd and 3rd feels brutal even at mid RPM. Injector mapping goe...
by bikerpete
Jan 19 2022 5:53pm
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

Indeed. I should soon be receiving my first shipment of a new flywheel/clutched, brushless e-trials bike, claimed peak 10kw, around 42kg. Interesting, is it a new company? do you have a link? I would assume it does not have the standard trials 21"/18" wheels+tires, shock and fork, or 42kg...
by bikerpete
Jan 15 2022 9:57pm
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

Indeed. That's funny about being able to restart if there's an e-trials in the class! Certainly doesn't happen that way here in Australia, nor in Germany from what I hear from a friend over there. I'm still not quite convinced that, " All of that can be mimicked by electric motor control progra...
by bikerpete
Jan 15 2022 1:42am
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

You have a point about using throttle, clutch and brake simultaneously. That does make it a bit tricky. Maybe a pushbutton switch on the brake lever itself so you move your finger over a centimeter or so to engage regen or not, then regen varies according to the first part of the lever movement or f...
by bikerpete
Jan 14 2022 8:16pm
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

All the carbon is aftermarket add-on covers. EM currently use the Silixcon controller which is very flexible from what I've seen, but I'm not sure it's really capable of the sort of control and logic that might be ideal for trials. Once the likes of KTM make a serious push into electric GasGas trial...
by bikerpete
Dec 20 2021 9:44pm
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

I started in the '70's, so yep cable clutch only back then. Glad not to have one now. I guess a lot of this comes down to the name of the game. For the most part Observed Trials is simply about who has the most skill at riding a motorbike over difficult terrain without putting their feet down. Addin...
by bikerpete
Dec 18 2021 2:11am
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

I haven't ridden a cable clutch in decades, don't think I'm that keen to do so! Are you talking electrically actuated mechanical clutch? Or an electronic non-mechanical clutch? I've never thought about an electrically actuated clutch. Could be intriguing, but I'm not sure how much it would really ac...
by bikerpete
Dec 16 2021 8:24pm
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

Nice torque curve on the TXT 300. Very strong off the bottom. Looks like it was not yet jetted proper to make power as observed above the 6200 rpm break in the power plot. Overall looks to be a great power plant for the class. Unfortunately, with the limitations of the piston engine, it mostly reli...
by bikerpete
Apr 10 2021 3:01am
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

I love it! It is small, light & cute. Do the tires have a good grip on wet rock? The knobs seem a bit small. Are they made of a good compound? Tubeless or not? There are two tyres available (3, but the third is not a great option for any condition so we ignore it): Kenda Krusade 20 x 4 - quite ...
by bikerpete
Apr 08 2021 7:30am
Forum: EScooter/EMotorcycle Build Threads
Topic: electric trial bike
Replies: 329
Views: 118417

Re: electric trial bike

efMX Trials Electric Freeride wrote:
Jun 17 2020 12:03pm
SWORDlimit Dirt Bike D1 20 and 24 Inch Electric Dirt Bike : 8)

https://www.amazon.com/SWORDlimit-Elect ... 089DN5KRG/
FYI: I just checked with the manufacturer - this Amazon listing is not an authorised dealer and will not receive any product.
by bikerpete
Apr 08 2021 7:26am
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

The link you posted doesn't work as it puts the E-S site in front of it. Nice looking bike and a smart 2 speed gearbox! Any more info/specs on that box and maybe even a possibility to buy those seperately for home builders? It reminds me a bit of the Oset bikes: https://osetbikes.com/au/bikes/new-2...
by bikerpete
Apr 08 2021 7:17am
Forum: EScooters/EMotorcycles
Topic: Observed trials bike designing
Replies: 174
Views: 14564

Re: Observed trials bike designing

Do you have any bnb pics of the 2-speed gearbox internals? No, I haven't pulled one apart yet. It's on my list of things to do! It's impressively compact - 10ml is the recommended amount of oil! I'm guessing it's straight spur gears inside from the sound and feel of it. There's no syncro, but it ch...
by bikerpete
Apr 08 2021 7:04am
Forum: EScooter/EMotorcycle Build Threads
Topic: electric trial bike
Replies: 329
Views: 118417

Re: electric trial bike

what I find most interesting is the two speed mechanical transmission:) .. hope to find more pics etc of it and how it works.. and china entry to the electric trial bike market.. (I never stop scouring the interwebs for such things;) .. I've been riding a dob for the past 6 months or so (I'm now th...