eVFR Electric Motorcycle

[Efexstube]

nice!!!!

[alanhaskins]

Very neat job, very impressive. What kind of top speed were you getting with the lead acid batteries, and what was the accelleration like?

[frodus17]

@alanhaskins Thanks! With the old lead, we had it up to 60-65mph, acceleration was about that of a 250, maybe with a little more acceleration.

[frodus17]

@alanhaskins top speed was about 60mph because of gearing (had it to 65 with the original rear sprocket). The acceleration was like a 350cc sized bike, maybe a little more. The lead was weak. lifepo4 should be much better

[nfarnham2008]

Nice, how long will this last on a charge

[frodus17]

@nfarnham2008 With the original used lead batteries, maybe 15 miles. I'm currently upgrading to 6.1kwh of LiFePO4, and that should give me between 40 and 60miles depending on how I ride.

[nicodanger13]

i hope it's street legal !! Awesome.

[miquelmahhhh]

¿how cost the esc+motor?

¿what model is the esc+motor?

¿where you bougth?

thanks and 5* video

[frodus17]

@miquelmahhhh

controller was $1500, motor was $600

model of controller = Synkromotive DC

Model of motor = K91-4003

[miquelmahhhh]

5*.........

[85bmw528eguy]

Very Nice bike! I like your work!

[rokas666]

Nice job!

[darthracing]

love the tach control - hook me up buddy :)

-T

[frodus17]

It was driven off the Synkromotive controller

[intrubbled]

I look at your bike, and the quality you are putting into it. It does show. I too am trying to make sure that my bike has this kind of build quality in it. I hope to be able to post a video within a month.

[intrubbled]

I'm doing well. I think I've finally got the mechanical kinks out of the system. Required the making of a few custom pieces. My build partner has managed to build a module to control both the engine and the motor controller with one throttle. A nice compact box that can be mounted up by the speedo. Has a LCD to see the mode the bike is in, as well as a switch to change modes. Frame is being powdercoated, and tank is being painted. Will start to rebuild this week.

[intrubbled]

Hi Frodus, I met you on Elmoto. I'm the guy with the hybrid bike. Your bike is awesome! Glad to see you're upgrading to LifePo4. Keep up the great work. Alot of people are going to be motivated by the work you've done.

[frodus17]

Hey, how's it going! Thanks!

Your hybrid is super sharp looking and has me and a friend wanting to do a hybrid.... he's already got an engine and we're looking at some motors.

[Hypnos7]

As a former VFR owner, i am pleased :)

Do you have a clutch system, or let the wheel spin the motor when coasting? If the latter, is there jittering?

[frodus17]

There's no clutch, just direct drive from motor to rear wheel. No need to idle an electric motor.

Not much jittering, not sure what you mean, but its pretty smooth.

[Hypnos7]

Sorry, the correct term (I just looked it up) is "torque ripple."

What I understand: torque ripple is the variation in the torque as the motor goes through one revolution due to things like back EMF-to-current mismatch (to reduce this problem requires sophisticated waveforming). These ripples are more apparent at low revs since they aren't smoothed out by inertia.

On an electric bike, I was thinking this might cause some vibration in low speed operation ...

[frodus17]

I've not seen that on my motorcycle, its very smooth acceleration, even when keeping it at 1-5mph, it just glides along, goose it and you accelerate fairly well (realize the bats in the movie are USED SLA UPS batteries).

The torque ripple is a term used mostly with AC motors or BLDC motors. This is a series wound motor. Those motors require constantly changing waveforms. Series motors are PWM, same waveform, different duty cycle.

[Hypnos7]

Ah, I assumed you were using BLDC -- a bad assumption, I realize now.

Thanks for the info!

[frodus17]

hey not a problem.... This motor has much more torque than the BLDC that I could find in my price range. Not as efficient, but its a torque monster with good batteries.

[fuckmeslowly]

That is a really beautiful motorcycle you have built! Aerodynamic and awesome looking machine!

[frodus17]

Thanks a ton!

Right in the middle of upgrading to LiFePo4 and my new fiberglass fairings... should be lookin great in another 3-4 months.

[yeeeeeehaw]

Great work.

Would love to see more.

Have you done a write-up anywhere on how to do this? I think you could benefit many who are interested in doing exactly what you have accomplished.

[stefanoargenys]

this is a good job

better then a petrol motorcycle

10/10

x

[frodus17]

Thanks a ton!

[85bmw528eguy]

Thats a nice conversion, I wish Honda and the others would take notice and do these. If they don,t When my money gets better this looks like a future project. I am going to do a KX 250 electric dirtbike next summer. I cannot wait to see someone affordably mass produce these.

[frodus17]

I wish they'd take notice too... Sounds like Honda wants to do some hybrids and even some all electric. I'm working with a motorcycle manufacturer on designing something... so its in the works.

[Dandura]

great work, but my moped goes faster.

[frodus17]

riiiiight....

we've had this to 65mph, at 72V, Its going to be 120V when we're done. Good luck keeping up.

[evmotorcycle]

He he! Don't ya just love YouTube! >:)

[mrfruit]

What's the range on this baby? And how long do you expect the batteries to last - they're NiCD, right?

[frodus17]

range is low with the batteries we got (15-20 miles). They were free, they're Lead Acid and not such a great fit power-wise) We're in the process of upgrading the pack to some larger lead batteries. NiCd doesn't have a great life, NiMH is expensive, lifepo is unstable in the market right now.... so I'll hold off on upgrading to expensive solutions. I only need 10 miles to work, charge then 10 miles back

[evmotorcycle]

Fantastic! Nice job on the tacho! More! More! More! Please! We all wanna see this baby on the freeway! >:) I bet the local Portland bikers are gonna be well curious when they see the eVFR riding along beside them! :)

[mercofspeech]

Nice and snug. Splendid job.

[phoenixar]

that looks very clean and well put together. I'm oozing with envy! haha

[szpectre]

Awesome job Travis!!!