crf450r 45kw race bike build

[speedy1984]

Looking good :thumb: Am i seeing things or have you chopped the centre section of the frame out?

 

[ZeroEm]

by speedy1984 » Jan 08 2023 8:22am

Looking good :thumb: Am i seeing things or have you chopped the centre section of the frame out?

You will need to read back in the thread, he extended it.

 

[rivvs]

Looking good :thumb: Am i seeing things or have you chopped the centre section of the frame out?

no on the shock mount on the 2017 and up honda is a lot lower than the previous generation. So there is way more space over the shock.

 

[rivvs]

Also stated working on the gear reduction. I welded the bearing support into the chaincase and started making the brakets that go between the swingarm.

 

[j bjork]

Looks good :thumb:
Do you plan to put steel spacers between the bracket and swingarm? (I see that you left some space there)
I think that can be a good idea, the alu gets a bit soft.

Is it the autput shaft from the bike you use and mount the sprocket on?
Will you be able to use it, or is it just a mockup ?

 

[speedy1984]

Looking good :thumb: Am i seeing things or have you chopped the centre section of the frame out?

no on the shock mount on the 2017 and up honda is a lot lower than the previous generation. So there is way more space over the shock.

Oh ok i see :thumb:

 

[rivvs]

Looks good :thumb:
Do you plan to put steel spacers between the bracket and swingarm? (I see that you left some space there)
I think that can be a good idea, the alu gets a bit soft.

Is it the autput shaft from the bike you use and mount the sprocket on?
Will you be able to use it, or is it just a mockup ?

Yes there will be another gusset between the two to make it stronger. The shaft is th one from my previous build. It is made from a snowmobile shaft that happen to be the same spline as a ktm sprocket. I will bu using the same part but it will be a new one because it needs to be longer.

 

[rivvs]

finished welding the supports for the bearings and started working on the chain tensioner.

 

[SlowCo]

Delicious welding, I'm jealous

 

[rivvs]

Finished the chain tensioner and started working on the battery. Trying to find the best shape for the series and parralel connection.

 

[speedy1984]

Im defo using pouch cells on my next build,there has to be a better way.Starting to look like a bike now :thumb:

 

[rivvs]

Im defo using pouch cells on my next build,there has to be a better way.Starting to look like a bike now :thumb:

At first I wanted to use pouch cell but I could not find a good source for them.

 

[rivvs]

Update on the build:
I finishing all the drawing for the battery busbar and sent them to a company on alibaba to get them made.
Also decided to change the bms. I will go with the ennoid bms because it will be able to comunicate with the vesc via canbus and also with the new display that I bought.
The display will show speed, range, amperage, temperature,fault and parts wear counter and will also show the information from the bms. So everything will communicate togheter. This will not be cheap but with the amount of money I have invested in this build I dont want everything to go up in flames like my previous build.

 

[sayontanseth]

Update on the build:
I finishing all the drawing for the battery busbar and sent them to a company on alibaba to get them made.
Also decided to change the bms. I will go with the ennoid bms because it will be able to comunicate with the vesc via canbus and also with the new display that I bought.
The display will show speed, range, amperage, temperature,fault and parts wear counter and will also show the information from the bms. So everything will communicate togheter. This will not be cheap but with the amount of money I have invested in this build I dont want everything to go up in flames like my previous build.
View attachment 330361View attachment 330362

This Display is very nice.
How do I get it?I want to use it in my Dirt Bike Build as well.

 

[rivvs]

This Display is very nice.
How do I get it?I want to use it in my Dirt Bike Build as well.

I bought it on davega website. But you need vesc based controller for it to work.

 

[TorgueRPM]

Does it have any voltage limitations? If it's designed for esk8, I would expect a limit of 16s or so.

Edit:
Looks like it only connects via rx/tx, so it doesn't read voltage directly, no limitations there probably

 

[rivvs]

Does it have any voltage limitations? If it's designed for esk8, I would expect a limit of 16s or so.

Edit:
Looks like it only connects via rx/tx, so it doesn't read voltage directly, no limitations there probably

Exactly the bms communicae to the controller via canbus and the display use uart to communicate with the controller.

 

[sayontanseth]

I bought it on davega website. But you need vesc based controller for it to work.

Thank you for the information. How is the 3shul controller?Have you been able to test it?

 

[rivvs]

Thank you for the information. How is the 3shul controller?Have you been able to test it?

I have tested it only with motor with no load since the bike is not finished yet.

 

[rivvs]

Today I finished the secondary shaft ant test fitted the chain.

 

[rivvs]

Fabricated the bushing for the rear brake pedal and mounted the master cylinder. Since it is one for ktm and husqvarna I had to make new mounts. Also test fitter the plastic. I need to trim down a little bit the cooling plate of the controller to get the seat at the right height.

 

[Bengy22]

I hate reading these build threads because I always find them really interesting and they make me want to go try to build a electric dirt bike myself but then I realize I don't have the tools or space or money to do it hahaha. Great looking build though, I look forward to reading the next updates you post!

 

[rivvs]

I received my bussbar for the battery. I ordered them from Alibaba. 0.5 copper with copper plated nickel strip to spot weld on the battery.
15 different shape. Also received the bms. One main board and two slave!

 

[larsb]

That's one of the sweetest busbar setups ever. Could i ask how much did you pay and could you share the supplier info?

 

[sayontanseth]

Great Busbar and BMS setup