Losi Promoto-MX Custom Gears and Fastest Speeds
ฝัง
- เผยแพร่เมื่อ 4 ก.ค. 2023
- Episode 81:
In this video we do a technical dive into making the Losi Promoto-MX faster. There are a couple of knobs to turn to make this motorcycle faster and we explore one of them in designing and 3D printing some custom parts for the drivetrain. We hit some record speeds for our bike and look to the future to going even faster.
How fast have you gotten your Losi Promoto-MX? Or any other rc motorcycle for that matter.
Let us know your thoughts!
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#rc #rccar #rccars #rcmotorcycle #teamlosiracing #promoto #speedrun - บันเทิง
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Subscribed, look forward to seeing what you got up your sleeve next. I got mine to 52 mph on a runway with a 22t Robinson pinion and ran my stock tires on a lathe to make them slicks. You have to make a wooden 2-piece wheel that clamps the tire to put it on a lathe. The knobby tires cause a lot of drag on concrete. I hope the Super Moto wheels show up soon. I have a 5200kv motor that fits. I want to build an 80mph+ Supermoto. It's very stable with slick tires on concrete. BTW, You can put the tire and wheel in simmering to water for 15 minutes and it will break the glue bead without ruining the tire or wheel. Just don't go into a high boil just a simmer. It's how I removed mine to mount the tire to a wooden 2-piece wheel to put on a lathe.
That’s awesome! Thanks for the tips on the glued up tires. Have you run into any issues with the speed controller cutting out on you with the taller gearing?
Now this is the video that I been waiting to see.
Awesome
Thanks for sharing your experiences and showing the parts in detail
Very Sweet pass. Great Job. cant wait to get mine.
Thanks for watching. I hope you get one soon. They are a blast!
I think you sold me on pulling the trigger on one of these. Great info and awesome work.
That is cool and I am glad everything held up well for the testing. I am kind of surprised the sprocket held up so well but I guess the stress on it is shared over 1/2 of the teeth at one time so it should. It probably helped too it was very close to the same diameter of the hub. Much larger and deflection may become an issue more. Either way congrats on blasting it up over 50mph! It did not take you long to dig in and start experimenting! LOL!
Dude this is amazing!! Your skills as an engineer/designer outweigh all my mechanical skills lol.. seriously though this is way cool Brice
First video that I’ve seen tinkering with this method… looks like your on to something 👍👍👍 Subbed
Awesome video man!
Keep up the mod videos of this new craze.
Subscribed dude.. from watching your losi promoto vids cam over from Addams channel man this bike is so awesome I love it 😊😊😊 great vids dude your a very clever guy with a lot of talent man
Great ingenuity! I would be doing the same with mine but it is missing in action. I haven't received mine yet and I preordered on the 22nd. Watching your videos is like "dangling the carrot" in front of me! LOL. Great stuff! Hopefully mine will show up in the next few months.
That's AWESOME!
Doesn't surprise me that you dove right into it. 50mph is flying!
But I'm sure you'll find a 3S and bigger motor, extended rear swing arm and slick tire and be at 70mph in no time. Lol
Wow, amazing, way above my pay grade to do anything like this, but is very cool
Cool run those definitely look cool
Thanks you for watching!
Awesome information on this! I thought 40mph was pretty solid speed😝. Cool that 3D plastic can take the abuse of a chain! Wicked interesting tear down brother!👍🏻😝
The aftermarket community, should really take notice. They should come out with these kind of machine gears,. M2C, RACING, are you listening?
Do you know what the absolute maximum battery dimensions are? I can see the recommended G2 LiPo is (LxWxH) 138 x 46 x 25 mm but no idea if there's any room whatsoever for a bigger sized battery. They don't arrive in the UK until August so there's still a fair bit of waiting and prep to be done!
You can get 8000 mah with those measurements.
Can you still get the front end off the ground with your changes.
When your done doing speed runs I hope you do dirt track, wheelies on the difference like getting up if you can. Your the first to do these mods. I will subscribe to see your future mods. Good luck. Thanks for video I really enjoyed.
interesting still waiting for mine to arrive. Whats the black tubes glued to the rear number plates for? Im guessing protecting the rider?
Nope, I glued those on to hold sparklers for the 4th celebration.
Great mods Brice. Can you gain much by squeezing a larger O.D. rear wheel/tire? Looks like longer swing arm would be needed, but hey, more speed by any means necessary, right?😄 -Tom
Just curious how changing the pinion on the motor will effect speed if at all. Did you try changing the pinion before doing the sprocket. If not will be good to see what you get with different pinion as well. Awesome work by the way everyone has been wanting to see what is needed to get more
Speed.
You can’t really drastically change the pinion. There doesn’t appear to be a whole lot of room to move the motor around as the result of a pinion change. There are short slots in the motor plate for setting the gear mesh. You might be able to move up or down 1-2 teeth if even that, but that would be it.
@@jack-o-trades You can fit up to a 24T pinion with no issue. Going up just 1 or 2 teeth on a pinion is a lot. I went 22T on mine. Stock is 20T
Good to hear. I’ll have to give this a go as well. I’m having problems right now with the speed controller cutting out when I try to ramp up the throttle. It seems like it happens at 3/4 throttle. Any thoughts on why? Over current protection maybe?
I can't quite figure out if the motorcycle recovers when you put the steering wheel in neutral like a car? or if you have to maneuver the steering wheel to get the motorcycle back upright like an airplane? Make a demo please with the remote in the frame Thanks. I have THE SR5 super rider and you need to maneuver the steering wheel to get the motorcycle back upright
If you let off the steering, it levels off and drives straight -- the MS6X system takes care of the maneuvering for you.
by the time everyone repairs upgrades, modifies, crashes repairs again, losi will be releasing version 2 also known as the horizon edition called ( this ones worth your money) !!!!! for-real.
Can this brushless system run 3s lipo. ? Waiting for that video !
You can not run 3s on this system.
can you use the dx5 with the promoto? that the spektrum update is now available
I don’t know….
@@jack-o-trades I want to say that if you have a dx5c you can use it with the promoto, I am from Spain and the promoto didn't arrive until August, I also bought the dx5c
Is that 04b-1 with 6mm pitch? Appreciated for any answer. This is the first time I’ve heard anyone say what it is.
Yes it is
@@jack-o-trades I think I’m going to get 10ft and sew some on the on the edges of my leather hobby stuff like motorcycle bags! And of course keep enough to also have promoto replacements. Thanks!
I would love for you to make a battery box that can hold a hardcase 3s battery 🔋
really cool.
Great I want one where do you buy one
You can order them from the usual shops but there is a pretty significant backlog. At this point you are probably better off trying to find one at a local hobby shop.
I hope they make version 2 for 3s?🤔
It's already 3s capable but you need to add a BEC for the gyro to still run on 2s voltage
What are doing about selling your design rear sprockets .... any one that owns this Rc is waiting for your product... 😊
Add an external BEC and run it on 3s. The esc is 3s capable but the gyro isn't.
Yep. That sounds like the way to go to faster speeds.
How do I purchase a gear from you?
Thanks for your interest. my email is in the channel description. I haven't really thought about selling gears if you reach out to me we can discuss. Alternatively there is some room (not a whole lot) to play around with the pinions.
Front sprocket easy to change? 1 tooth larger on the front is worth 2 teeth off the rear sprocket.
Maybe, someone would have to make custom drive sprockets as it is kind of special with a through bolt vs a grub-screw and has bosses on both sides.
Can you sale me a set of the gears your just made?
I can help you with the gears but are you able to adjust your chain size? Shoot me an email at jack.o.trades805@gmail.com
@@jack-o-trades just emailed you brother
Can you sell me this in a kit form. If so can we talk about it.
Thanks Danny
Please send us a proper link ....
No way I'm buying one...I would buy 10 and open a small place where you come and pay to drive.
Too bad im flat empty on the rc funds....$$$$ 😢
change gear of motor or change batterie for 100C is more easy no? I think that all people who have 42mpH have 50C batterie stock and LOSI advise 100C
Gears aren’t available and it would be somewhat drastic as you would need to swap out a minimum of two different gears (eg pinion/slipper-spur) as the motor doesn’t have a lot of adjustment. I do have a 130c pack I can try.
For more speed instead of making custom gears why not try a 3660 5400kv hobbywing motor.
Definitely something to try. I do like the idea of being able to swap out and play with the gearing. I also feel that the gearing is easier to swap out than a motor but it's not for everyone.
@@jack-o-trades your right everyone doesn’t have the option to able to swap gears around to be honest I love the idea as well with being able to swap gears. But I know the changing of motors can be cheaper.
@@jack-o-trades the best $25 I ever bought was a racestar 3650 5900kv . I ran that motor on 4s in my 2wd slash with 76/26 gears and hit over 100mph the motor still runs good no issues with it . .Type in 95mph 2wd slash on TH-cam exactly the way you see it here . First short video to pop up