Donor Gearboxes

[el chupacabra]

I was thinking about doing the crank like the patton originally, although I wonder how much torque you can transmit through a single keyway. I’m sure I can google that right now haha.

I’ve finished designing the oil pump and am quite happy with the outcome. I’ll post the progress when I get home. Nova got back to me and explained the situation with the gears which was nice.

It’ll almost be time to 3D print the cassette and oil pump.

[el chupacabra]

Here's what I think could be close to the final oil pump, it will be driven off of first gear. I will need a small copper tube to feed the back of the output shaft bearing. The pump will be the Honda parts mounted in a custom housing with a custom drive shaft.

[jato]

that part looks like it belongs in a race engine ... time to get a bit of ally plate then push "cycle start"

[el chupacabra]

I should have my own 3D printer tomorrow to speed things up.

Otherwise this showed up, check out the quality of the casting . . . It’ll work for mocking things up but maybe I go OEM when it’s time to get it running. I think the core shifted on them.

[F5 Dave]

Hard to tell much from pictures with the exception of the boost port that looks entirely on the piss.

[el chupacabra]

The rest of the casting seems good so far. They refunded $35 after I sent them the photo so really it only cost $60 + Shipping so not too bad of an outcome for a mock up cylinder and piston.

I was planning on using four of these but if the quality is this hit and miss I might have to go OEM. I am yet to measure the port timing.

[husaberg]

The rest of the casting seems good so far. They refunded $35 after I sent them the photo so really it only cost $60 + Shipping so not too bad of an outcome for a mock up cylinder and piston.

I was planning on using four of these but if the quality is this hit and miss I might have to go OEM. I am yet to measure the port timing.

So thats 95$ with niksil plating??

[F5 Dave]

Well. . . Silver coating of some description. . .

[el chupacabra]

Yep, and a single ring piston . . . Still might buy 3 more haha. Hopefully this is a one off.

[Grumph]

You'd have to wonder where the ring pin is. Is that why the boost port is skewed ?

[husaberg]

13$ each for KTM85 cylinders with PV shipping only 10$ wtf.
but you will need a head as well. which for som reason id 80$ each?
https://www.aliexpress.com/item/1005003510825075.html
https://www.aliexpress.com/item/1005005402417497.html



The beauty of the KTM as well as a PV they do a 105cc kit.

[el chupacabra]

I know Athena do a 112 kit for the yz which would take it out to 450cc.

The shipping is where they pump the prices if it seems too cheap.

[el chupacabra]

Now I can test fit everything before carrying on with the design

[F5 Dave]

Sexy. Apart from your weird thumb.

[el chupacabra]

Thanks. Weird thumb aside it all fits together quite well. I’ll have to get a picture of it all assembled.