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Electro Flyers replied to the thread 1980 Kawasaki 440 LTD 8kW conversion.
"
Quote Originally Posted by Michael Moore View Post
In case you aren't already aware of it, your rear-suspension mounted motor (as used on countless scooters) will have the same squat/anti-squat effects as a conventional (non-floating rear gear case) shaft drive. That can be ameliorated with proper selection of the swing arm pivot point but you may find that the spot that reduces jacking in the rear suspension may not work too well for bump absorption. But if your motor isn't very powerful you may not see a lot of jacking.

Also, a 10T sprocket is a horrible choice for a chain drive, most chain manufacturers prefer a minimum size of 16 to 17 teeth. The overly-small sprockets can be a source of vibration from the chordal motion of the chain as it goes around the sprocket, and they greatly reduce the service life of the chain and sprockets.

cheers,
Michael
The counter torque of the motor would produce some anti-squat. This would be desirable(unless you wanted to do wheelies) during acceleration of a high powered bike to keep the front wheel planted to maintain steering control. But you're right, It's probably not much of a factor with this low powered bike.

I'm with you on the sprocket size. Although, he may get away with it this low speed, low power, "art bike" application. But it will be noisy in a mechanical, not-so -artsy kind of way. Also, his idler design reduces the chain wrap around the small sprocket-not a good thing.

Getting back to simplifying the chain idler I wrote about before: As I recall, this this bike also had a variation that came with a cog (tooth) belt drive. If that's the case, and it has the same swing arm as its belt drive cousin, there may be enough room for the lower portion of the chain to pass by the inside of the swing arm. I just can't tell if there is the room with his artsy-wavy filming technique! If there is not enough room, a simple idler sprocket holding up the bottom of the chain, may move the chain back to where it clears the swing arm. This idler would be mounted to the top of the swing arm, back near the rear sprocket. this would also increase the chain wrap around the sprockets- a good thing.

BTW I've worked with this guy before. Once he is set in his design ideas, he is very reluctant to budge at all on to better and sometimes safer ideas or designs. I thought I was bad in this department, but this guy is something else. I think part of the problem is that he writes in this folksy, contemporaneous style. That's OK, it's his style. But, the designs have been set and the work done weeks or months ago. He seems very reluctant(or maybe it's just too late) to go bake and improve things. There's only so much crap you can cover up and call it art. Gotta love you FA, but I also gotta call it like it is. I mean things were so bad sometimes, I though about quoting out of Ted's book to get you to budge. "

30 Minutes Ago

Functional Artist replied to the thread 1980 Kawasaki 440 LTD 8kW conversion.
" With the motor "tucked up in the pocket", we have a lot more room to work with
...now, we can be more creative with component placement (to look kool)
& we can spread the components out more, to help reduce heat build up

Component placement

We have to find a place for
...a breast plate
...a thumb throttle & bracket
...& also the speed controller & bracket

Breast Plate:

The breast plate is a piece of 1/8" x 3" steel
...with a couple of custom bends
...it mounts just inside the (2) front frame rails

The breast plate is where
...the exhaust pipes will originate
...the main power cut-off switch will be mounted
...& where the solenoid will mount

After cuttin' the ends of the exhaust pipes off
...I used a dremel to smooth the edges
...then coated the edges with liquid rubber (didn't want metal to metal squeakin')

I bolted the stock exhaust flanges to the breast plate
...& coated the inside of both flanges with liquid rubber

When I mounted it on the bike
...I tucked the pipe ends into the flanges & secured them with screws up thru the bottom


Throttle:

The thumb throttle mount is where
...the thumb throttle will be mounted & the bracket that holds the stock throttle cable

The throttle bracket is a
...simple piece of 3/16" angle steel
...with a piece of 7/8" od. water pipe welded on

It will be mounted under the tank also
...where the upper gas engine mount used to be bolted to the frame

Speed Controller:

The speed controller mount
...the speed controller (the brain) is the next biggest, most important piece after the motor & battery pack
...it gets hot so, ample kooling is best
...but, it's kinda delicate & all the main electrical connections go there so, it's gotta be protected too

It looks like I can tuck the speed controller up under the gas tank (it will be protected & have lots of air flow)
& it'll look kool too with the shinny lines of the controller & the kooler (heat sink)

So, I used a piece of 3/16" steel to make a mounting bracket for it
...it bolts to the speed controller & heat sink on one end
...& on the other, it bolts to where the coil for the old gas engine bolted to the frame of the bike

Here is another video with even more info

https://www.youtube.com/watch?v=FYukp1LCrMQ&t=2s "

1 Hour Ago

Richard230 created the thread Smart helmet.
" You might find this new product interesting and it looks like it might have an affordable price, too: http://www.motorcycle.com/products/f...y-smart-helmet "

2 Hours Ago

Michael Moore replied to the thread 1980 Kawasaki 440 LTD 8kW conversion.
" In case you aren't already aware of it, your rear-suspension mounted motor (as used on countless scooters) will have the same squat/anti-squat effects as a conventional (non-floating rear gear case) shaft drive. That can be ameliorated with proper selection of the swing arm pivot point but you may find that the spot that reduces jacking in the rear suspension may not work too well for bump absorption. But if your motor isn't very powerful you may not see a lot of jacking.

Also, a 10T sprocket is a horrible choice for a chain drive, most chain manufacturers prefer a minimum size of 16 to 17 teeth. The overly-small sprockets can be a source of vibration from the chordal motion of the chain as it goes around the sprocket, and they greatly reduce the service life of the chain and sprockets.

cheers,
Michael "

3 Hours Ago

Functional Artist replied to the thread 1980 Kawasaki 440 LTD 8kW conversion.
"
Quote Originally Posted by Ted Dillard View Post
Ah gotcha. I missed that because I couldn't watch the vid for more than a few seconds...

Seriously, though, JUST because I've taught photography most of my life, do you want people to take their time to watch your work? Especially considering your "Artist" tag, my advice is to invest a little more of yours making them watchable. Otherwise, there's not much point in making them. Besides, once you get used to using a tripod, you soon start wondering how you worked without one. Above and beyond anything else, it makes you think about your shots, composition and storytelling a little more deliberately.

Stepping down now, carry on.
See, videos say millions of words
...even the "unprofessional" ones

Sorry, I am not a better videographer
...too buisy makin' stuff, I guess

Learning as I go
...so any & all pointers are helpful

I just use the videos to help explain stuff
...like the "idler/jack shaft" concept described above

I do try to be creative, check these out

Here is a kart called Double Trouble
https://www.youtube.com/watch?v=TRIKLdvGlTA

This one is called !Arriba!
https://www.youtube.com/watch?v=yn7LlvugyiA "

5 Hours Ago

Stevo replied to the thread 1980 Kawasaki 440 LTD 8kW conversion.

6 Hours Ago

Nicman clicked Likes for this post: Sachs xtc 125 conversion by flo

6 Hours Ago

Nicman clicked Likes for this post: Sachs xtc 125 conversion by flo

6 Hours Ago

Ted Dillard replied to the thread 1980 Kawasaki 440 LTD 8kW conversion.
" Ah gotcha. I missed that because I couldn't watch the vid for more than a few seconds...

Seriously, though, JUST because I've taught photography most of my life, do you want people to take their time to watch your work? Especially considering your "Artist" tag, my advice is to invest a little more of yours making them watchable. Otherwise, there's not much point in making them. Besides, once you get used to using a tripod, you soon start wondering how you worked without one. Above and beyond anything else, it makes you think about your shots, composition and storytelling a little more deliberately.

Stepping down now, carry on. "

8 Hours Ago

Functional Artist replied to the thread 1980 Kawasaki 440 LTD 8kW conversion.
"
Quote Originally Posted by T Rush View Post
ok, now I see what(why) you are doing
....but why does it still have the exhaust pipes on it?
I wanted to maintain the "original/stock" look of the bike as much as possible.

IMO
Without things like the fuel tank & exhaust pipes you lose "the look" of a motorcycle
...it's just a skeleton of a motorcycle, with no style or class
& those few extra lbs. won't make a noticeable difference "

8 Hours Ago

Functional Artist replied to the thread 1980 Kawasaki 440 LTD 8kW conversion.
"
Quote Originally Posted by Ted Dillard View Post
1) ...for the LOVE OF ALL THAT IS PURE AND RIGHTEOUS please use a frikkin TRIPOD on those videos (old photographer/videographer here, speaking with love in my heart)

2) So, when the suspension gets loaded, does the chain tension change? (answer: yes)

Thanks, for the input

1.) I use a tripod when I need both hands "free" for the project or demonstration I am working on
...but, most times I find that it's too limiting
...the tripod gets in the way & I end up banging the camera on stuff

2.) the answer is NO. The motor, the "idler" & the rear wheel are ALL mounted to the swing arm
…& ALL move as (1) unit "

8 Hours Ago

Ted Dillard replied to the thread 1980 Kawasaki 440 LTD 8kW conversion.
" it's ok. i took my meds and watched this video and now i feel much betterer.

https://www.youtube.com/watch?v=1rLGF5Fc8go "

8 Hours Ago

Ted Dillard replied to the thread 1980 Kawasaki 440 LTD 8kW conversion.
" 1) ...for the LOVE OF ALL THAT IS PURE AND RIGHTEOUS please use a frikkin TRIPOD on those videos (old photographer/videographer here, speaking with love in my heart)

2) So, when the suspension gets loaded, does the chain tension change? (answer: yes) "

9 Hours Ago

Richard230 replied to the thread 2018 Energica Eva EsseEsse9 review.
" My BMW dealer has the new SS9 model on his showroom floor. It really looks nice, although I thought the handlebars were a bit too high for my taste. (Not something that I usually say about Italian bikes.) The salesman told me that the SS9 uses the same high-power motor as do the other Energica models. They also had a white 2019 Ego model in the showroom.

I was asking the salesman about the various features of the Energica models that they sell. We discovered, via research that he hadn't done before, that they have a water cooled controller, an oil cooled motor and air cooled batteries. The are really nice motorcycles, with lots of interesting and well thought out features, but they sure are heavy. This year prices seem to start at around $25K and go up from there. "

10 Hours Ago

Richard230 replied to the thread Ural 650 custom EV.
" Speaking of cooling EV components: I was visiting my BMW dealer last weekend and was talking with the salesman about the various features of the Energica models that they sell. We discovered, via research that he hadn't done before, that they have a water cooled controller, an oil cooled motor and air cooled batteries. "

10 Hours Ago

Functional Artist replied to the thread 1980 Kawasaki 440 LTD 8kW conversion.
" If pictures say 1,000 words, videos say a million.

I thought it was a great idea & looked kool too. (you could also call it Mechanical Art)

It seems to work well. I did lots of "on the stand" testing & have put ~30 miles on this set up so far with no issues.

* I don't believe my DIY rear sprocket is exactly centered or "true" because, if you listen in the videos, you can hear the chain "slap" a little bit on the chain guard, every now & then. "

12 Hours Ago

T Rush replied to the thread Ural 650 custom EV.
" how about a water cooled controller?

the charger doesnt have to be permanently mounted in the bike, and with a sidecar you would always have room to stow it in there if you knew you were riding somewhere you could charge besides home

but the thought I had: for elmotos batteries usually end in the space where the old ICE was, but if you can put those in the sidecar floor, that would leave this space vacant....so what if you could design a 'hybrid' system? with a small ICE genset for longer rides or larger loads...crazy idea for a bike I know, but had to toss it out there "

16 Hours Ago

T Rush clicked Likes for this post: 1980 Kawasaki 440 LTD 8kW conversion by Electro Flyers

17 Hours Ago

T Rush replied to the thread 1980 Kawasaki 440 LTD 8kW conversion.
" ok, now I see what(why) you are doing....unless you explained this in another video; but with your motor placement, the chain can't directly drive the rear sprocket as it would of hit the swing-arm where the chain rounds the bottom of the sprocket angling to the motor....so with the jackshaft the chain can stay under the swing-arm until it has clearance to run straight up
unique solution...and it all works because the motor sprocket, idle sprocket, and drive sprocket are mounted to the swing-arm


I thought about a similar idea for a motor in that area of the frame; with two idle sprockets(locked together or keyed on the same jackshaft) at the swing-arm pivot point, then using two chains(one on the motor, other on the rear sprocket) to the idler sprockets....as the swing-arm pivot point sprockets stay relatively stationary to both drive or motor sprockets, tho the distance directly between them doesnt....and the two idle sprockets can have different numbers of teeth to step down the gearing
...so I couldn't quite fully imagine how your chain wouldn't go slack(and if the idle sprocket was to take up that slack?) , and why you couldn't just directly drive the rear sprocket from the motor; until I saw that last video, but I get it now


[edit] oh, I just noticed that last video is a year old and saw videos of this project completed, err or almost....but why does it still have the exhaust pipes on it? [/edit] "

17 Hours Ago

tylerwatts replied to the thread Sachs xtc 125 conversion.
" Looking very cool Flo!

Cheers

Tyler "

1 Day Ago