New hot rod yuba e-bike build

Here is a couple of pics I forgot to show during the being of this post of the controller being positioned next to the electrical conjunction box where all the connections will be made & for the 12v system. Couple of zip ties to hold it to the frame helps. A key start bike stops people from a quick ride away and is cooler.
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Oh, you'll definitely smoke a gas bike in a drag race. Unless he's got a 9 hp morini or something in there, you'll blow his doors off.
 
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Thanks for the racing inspiration. I noticed the pics of the yuba bike with a smaller wheel on the back?
Should i try putting on a 24" wheel on the back for increased torque & acceleration? Also I can get way better tires and stronger wheel setup for 24", it should not interfer with the stock peddling arms hitting the ground right?
 
The one facing left actually has a 16" scooter wheel with over size 14mm flats on the axle that fit the Yuba dropouts, and a built in drum brake that made it an easy install... And even with the longer travel fork raising the front it's a bit low on clearance, but I don't even notice anymore. The second one I just got off Craig's list for $200 with the full rack and foot rail... that one is going mid drive with a big 20" tire with bmx 14mm axle hub on the back, and left side chain (probably). I put a hub motor I had laying around on the front for rolling around until the other details settle down.
 
What will get in the way if you go 24", or a big 20", is the v brake mounts. You have to pretty much commit to cutting them if and welding on a disc brake mount, or full regen brake setup
 
This was it all wrapped up for El Nino..which got me thinking about how much battery could be faired in there.... looks like we need a 300 mile group ride :)
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No easy way to get a mid drive kit for the yuba, if any person is serious they better be willing to spend probably $700 for one, that's how much I had to pay for mine with urban commuter mid drive. I got a 9c model hub motor with it & a 12fet controller & was $1,300 total setup for my first ebike build which was a leap for me but payed off using it for work. During the time it was used with peddling & motor on same chain, i broke the double freewheel going up steep hill, which was is great now after fixing with replacement part and I have destroyed a freewheel & wheel threads. But I can get it right this time with motor seperatly driven on other side of wheel using disk brake mount as my sprocket. Standard bike chain should take up to 15hp.
 
Voltron said:
looks like we need a 300 mile group ride :)
Yep plan to ride all over the place crazy like showing it off. & i will see durring town events if photographers will share front page pics. I just recently added a quick parallel connection option to switch to about 52v for many reasons. I like riding on the country roads & some company would be nice to have. I would like to see how it could fair against pikes peak climb, with some cooling tricks like ferofluid?
I'm going back to drawing board looking for a 24" mag wheel on the back, should solve many things including wieght of massive battery.
 
Unfortunately, they don't allow bikes on Pikes Peak except on the one day they have that group ride.

If you ever are passing by on I-10, there is a good climb in my area, 10 miles of mostly 8%. Emory Pass on NM hwy 152. Not the length of Pikes Peak, but a similar climb in length and profile to Alp D Huez.
 
I have decided what is best for a heavy duty rear wheel. I like thuds skyway mag wheels. I want to try using a white 24" skyway tuffwheel for the rear wheel with 14mm axle with 7 speed freewheel. Then I like the idea of fitting aluminum in the gaps to mount my sprotor on to, then weld a brake tab. This should be very durable for the speed, & heavy 7kwh battery. I don't know anything about tuff wheels but perfer plastic one. This has to be the best wheel setup. Any pointers on a sprocket is appreciated, as I notice a lot of Cooling holes for them, will be asking a few place, including motorcycle shop.
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dogman dan said:
Unfortunately, they don't allow bikes on Pikes Peak except on the one day they have that group ride.

If you ever are passing by on I-10, there is a good climb in my area, 10 miles of mostly 8%. Emory Pass on NM hwy 152. Not the length of Pikes Peak, but a similar climb in length and profile to Alp D Huez.
Sure I'll keep in mind, so if pikes peak is annual, when is it held, i need to do my research. If I attend hope i dont see outrider trikes, didn't get any info examples for thier bike effiency on range when I asked, they said they answer questions, & believe to establish a range chart system on thier site, but ignored my questions multiple times, now they can keep thier $18,000+ piece of junk to them selves. Even when I inquired about thier bike long ago, no answer. I say show em how big boy's do it, & build hot rod ebikes for less than that much cash!
 
Amen to that brother. I was thinking screw the group ride and go do pikes peak some other time, but found out it's a national park. No fun allowed in national parks of course. Only open to bikes one day a year. Look into the group ride, I'm not sure if ebikes that are really motorcycles with pedals are welcome. Bear in mind, you'll be riding an illegal vehicle in front of a shitload of national park chotas. Might be fine though, in 52v configuration. I'm just saying, you hit 40mph up that road, those park cops will notice.

But once you are actually in Colorado, plenty of badass roads to climb. Near aspen independence pass tops out at 12 thou, but if that's not thin enough air, near Denver there is a road to 14 thou. Mt Evans, the map says paved. That high, I doubt it's open to the top in june.

The one I dream of riding is off road, serious jeep road, from Lake valley to Ouray. I drove it to 10,000 feet once, and got stopped by the snow. Then I went and climbed lake peak and skied it.
 
Motors are more efficient when at higher rpms, so if I want to go say 15-18mph with high rpm, with the most efficiency, what would my gearing have to be set up for to get highest rpm?, which heps extend the range i think All I know is the mxus is a 13kv motor.
I'll change the gearing back to normal after GWR attempt to also set the feel back to low, medium, fast, with three speed switch.
 
Thats some hilly climbs! I have mostly flat roads, but only a couple hills in town, on being a overpass, and high way, but one other on a dirt road 5 miles out is so steep that it is 40+ down hill with a regular bike and can be scary watching out for dips in the road. Its so quite and deserted out there, its so peaceful, unless I air horn at some scared cows. Modified two air zounds!
 
My goal: my intensions were to spec the bike to out accelerate most vehicles. I dont know for sure but I hope the lyenn 24fet controller & mxus 3 turn hub motor fairs well. I was told 12,000 watts would pretty much do the job, but did not make it to that power. Battery should spike up to 4c for a short burst. Do I stand a fair chance?, or do I need to spec up for more power.
 
Also I love mid drive setups, because Thier customizable. Not a big fan of hub motors in a wheel unless a very strong wheel and automaticaly cuases wheel drag. I could add another hub motor to the front or back, (I don't know wich is best), with another 24 fet controller, and I don't know how it will respond with the battery and given torque.
 
Current project is on the mxxus hub motor installation procedure to fit in the mid drive bracket. Turns out the bad ass mxxus with 45mm statator fits a 142mm axle drop out & I currently have only 135mm dropout. So i believe i need to grind a 1/16 from each side and spread the the plates a 3/16 or so to fit the hub motor perfectly, should work out?
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