konrad

https://www.cpd-usa.com/shop/tc01q-60401-00-00-asm-em-assembly-throttle-domino-epure-escape-mid-22-up-tc01q-60401-00-00-asm-17940#attr=17910 If he does not want to pay the OE price and does not mind doing some wiring, this look similar: https://www.electricmotorsport.com/domino-twist-grip-throttle-with-microswitch.html I think this was the original thread.

It's just a tube. Knock something out on your lathe. I like to start with PVC plumbing pipe if the dimensions work out. Note this only changes the preload / front ride height. It's no cure for the wrong spring rate.

Thanks for reporting that, I was unaware. I will ask a friend if it was implemented in 2022 as well. EDIT: Friend reported his 2022 Race has no additional throttle connector in the loom.

Does your bike even have the low fuel light? Most did not. Just plug the hole by threading in a bolt. One of my early mods was to make a fuel level sight tube, but I ended up not liking it: Photos here: https://www.ossa-efi.com/home/my-upgrades/minor-modifications

Yes, in theory. But, so far, EM Connect's programmability is only relative to the maximum permitted settings. The is no reference to any absolute power or torque numbers. (I suspect the Dragonfly's U-Mapp will be similar.) Edit: just saw that Dragonfly shows power in watts. And even if there were, the meaning would be open to debate. Is it the peak power or the continuous rating? And what happens when the controller decides to limit output based on its internal temperature? There's also the whole question of how having a single gear affects the situation. I've tried to address some of that starting here: https://www.electricmotiontech.com/home/what-makes-a-good-trials-motor But it's far from complete. The bottom line is that driving force at the rear wheel is what really matters.

The 2021 EM Race has a "schoolboy" mode. The Map switch then gives three very low-power settings. But in 2022 onward, this feature was eliminated so EM could use that input to activate TKO.

10mm thread with an O-ring. https://www.ossa-efi.com/home/electrics/sensors#h.pc3f12lv2znb

For US dirt riders of a certain age, Malcolm truly was a legend. A friend had the good fortune to encounter Malcolm in the Mexican Baja, and they rode together for a while. The AMA magazine published excepts from his autobiography. Malcolm's early life was fascinating too. Malcolm's father lived to be 99, and conceived Malcolm when he was 80! https://www.malcolmsmith.com/malcolmstory

The short answer is, no. I'm sure each map has an ignition curve tailored to match the fueling/performance. It's also likely a 3D curve, as there is TPS data available. I plan to do more reverse-engineering of the ECU this winter, so maybe can steer you in the right direction after that.

That is a worthwhile endeavor! Are you thinking of something like a Microsquirt? As far as I know, the entire Megasquirt product line only provides a conventional (inductive) ignition, which is not ideal for a 2-stroke. But certainly better than nothing. I imagine you could have a separate CDI triggered by the Microsquirt, but that would mean having another box. Although on an Explorer, at least there may be room for it under the seat.

I found this: https://www.ohtokc.com/products/electronic-ignition-yamaha-ty250-hit Did not see any written installation instructions on that website.

I've used that technique many times with conventional (wire spring) clutches. But I would not recommend it with the OSSA for two reasons. 1. There are 18 small, slippery screws that can easily be dropped. 2. A thrust washer at the end of the kick-start shaft that is likely to fall off when reinstalling the clutch cover with the bike is in that orientation. In fact, I lean the bike in the opposite direction to ensure the washer stays put. To the OP, the control ring number you select depends mostly on the thickness of your clutch pack. https://www.ossa-efi.com/home/my-upgrades/clutch-control-ring https://www.ossa-efi.com/home/engine/clutch

Can you post a link to the Malaysia OHT bikes CDI? I can't find it with a search.

Seems like you have done everything correctly. Since you made the timing mark, are you sure it is BTDC and not ATDC? As a general comment, digital CDIs need their pickup location well in advance of the firing point to allow time for computation. It takes significantly higher voltage to fire the plug under compression than in open air. Try reducing the plug gap to half what it is now. I would not use the bike that way, just as a diagnostic test. If still no success, I would refit the OE ignition to verify the bike runs.

Try a GM dealer. GM Part # 11588754 M10 x 1.5 x 105 Multi-Purpose Bolt. Less than a dollar, US.

Chris Pearson finished 33rd in the 2024 Scott Trial on a FACTOR-e! 82 brutal miles in under 7 hours. Link to a very well produced 10-minute video by Inch Perfect: https://www.youtube.com/watch?v=IuZ141hE8W4

Just FYI, anything after the item number is just a means of tracking how the link was generated. https://www.ebay.co.uk/itm/116330877076

Great to know! Titanium Joe Inc. 1407 John Counter Blvd. unit 90-B Kingston ON, K7K-6A9 613-545-0563 Kingston 905-556-0289 Canada 315-285-4414 USA sales@titaniumjoe.com

Worthwhile project! To get some idea of titanium's cost, here is a company that sells titanium fasteners: https://www.probolt-usa.com/titanium/?page=3

From a press release on EM's website, "YAMAHA MOTOR Invests in French Company ELECTRIC MOTION SAS" No real details. Read it here: https://em-motorcycles.com/media-file/568/news-release-eng.pdf

That's fabulous! Thank you! Only recently did I figure out that 4th gear is really 1.878:1, rather than the 2.112:1 that has been perpetuated in the documentation from the introduction of the Pro model until at least 2023. That actually makes 4th gear useful, as I suppose anyone who owned the bike understood. All these years I have been disrespecting Xiu because no technical person ever proofread the manual. I have an unsubstantiated feeling that the design is being used in EM's FACTOR-e now that GG's patent has expired.

Pictures, please! I would love the see the actual gearsets from their "Four / Six system". The patent drawings are not great.

Chris, that is a fabulous summary! Thanks for doing the work. I just have one question, what is Konrad's W3? My missus just acquired a Dragonfly -- chosen almost entirely on the basis of weight. There is an immense amount to learn about that bike, and I will be adding to my website in the coming weeks.

Trials motors generally run hotter than other competition 2Ts to improve fuel vaporization and throttle response while sacrificing some loss of charge density. 5 to 10 degrees C of hysteresis is fairly typical.

Not advisable. Although as a newbie, you might be able to get away with it for a while assuming you don't riding aggressively. Modern rear trials tires use a very low inflation pressure and no rim lock. This is just begging to shear the valve stem off a tube. It's not uncommon for the rear to slowly lose pressure. If you only ride once a week, check the pressure prior to riding. A rear trials tire can be run down to nearly zero pressure, but you risk denting the rim.