[henry]

This is my second project. Let's see if I learn from my mistakes.

I'm starting with a YZ85 and I'm planning on putting a liquid cooled, 20kw hub motor in. It's going to be yellow. Details will follow as I figure things out. I'm building it for my Dad.

 

[rex_saugerty]

Yes... Will follow this one aswell. I know mattson will drool all over this

 

[Smoker]

I'm building it for my Dad.

I'm in! :rock:

Yellow? Yami speedblocks?

 

[MikeGyver]

Awwww yeaaaa boyeeee!

 

[Leroy]

The first project was very interesting! I'm sure this will be much more!

 

[nolove]

Can;t wait to see this

 

[rex_saugerty]

No updates?

 

[Mattson]

Yes... Will follow this one aswell. I know mattson will drool all over this

:tongue:

 

[XxGRYMMxX]

MORE!!

 

[henry]

Someone has put a bid on the complete 2 stroke motor including radiator fuel tank etc...great! Can pull it out next week!

In other news, I'm trying to order my hub motor and they won't send me the details I need to actually pay for it. Slightly off-putting when a company doesn't get back to you when you are trying to buy something...

 

[rex_saugerty]

So it happens at your side of the earth too. I have when that happens

 

[henry]

Motor out and sold:

Hub motor is on the way:

 

[henry]

I've been working on getting the rear hub laced but I've also been fiddling around in
CAD a fair bit. Disclaimer - this is super conceptual and mostly wrong, constructive criticism
should be saved until I have a basic concept roughed out. Just wanted you guys to know I'm
working on it!

I've been considering the idea of making as much of it open source as possible, all the drawings, dxfs and 3d files. Just a thought. I want to make it super simple with really robust, common fittings. Also lots of laser cut parts and standard sized tube/RHS.

I'm almost definitely using different batteries than those yellow ones

 

[Oli]

This looks cool - something I've wondered about myself.

Got some questions too - what is the hp of that motor? What about a gearbox?

I have seen some of the battery packs they have used for bicycles, are you looking for power or range with this project?

Really looking forward to see it develop

 

[henry]

This looks cool - something I've wondered about myself.

Got some questions too - what is the hp of that motor? What about a gearbox?

I have seen some of the battery packs they have used for bicycles, are you looking for power or range with this project?

Really looking forward to see it develop

Apparently about 40 hp peak with liquid cooling, which I will be using.

I have an approximate top speed I am looking for with this bike, this is based on the 3 winding/lower rpm per volt motor, the final battery voltage and the rim diameter. I will certainly be looking to ensure I can utilize the peak power of the motor when necessary. I haven't decided what kind of batteries to use yet.

I'm currently trying to find a 16x1.85 rim with 36 holes. Somehow I'm already trying to find parts that don't really exist in NZ. And I'm looking at rims thinking "Could I make one?" and then slapping myself.

 

[shinyribs]

A 16" rim with 36 holes is a Harley rear rim all day long, but the 1.85 may be a problem. If you can stand to fit a 2.15 rim ( 110 tire) then take a look in that direction.

 

[Wrexz]

Saw this online it reminded me of your build http://www.nightshiftbikes.com/savage/

 

[henry]

I am working hard on this! Just nothing concrete to show yet, below is small preview
of what I've been doing. Still lots to finalise mechanically.

image removed

 

[henry]

Apologies for poor pic quality. I've built my first wheel! It's not true yet but I still feel a great sense of accomplishment. I got custom spokes made for it. I had to 3d model the wheel and the hub and then lace it all on the computer to figure out the very short spoke lengths.

Unfortunately I think I might have made them a fraction long still...When they are properly tightened they might stick out of the nipples inside the rim. I could grind them but I hate the idea of doing that.

 

[shinyribs]

I could grind them but I hate the idea of doing that.

That's pretty much the way it's done. I wouldn't fret over that.