Messages

1

Projects / Re: Panthera Motorsports 600cc in Yfz450r

« on: May 26, 2024, 09:05:28 AM »

Too late now,  haha.  Already paid for the 600.  Go big or go home they say.

Radiator mocked-up.  Too bad I was sent the 1st gen so I couldn't bolt it.

2

Projects / Re: Panthera Motorsports 600cc in Yfz450r

« on: May 23, 2024, 04:08:46 PM »

That is a good option but...why not have all the power.haha

I just ordered a new yfz450r tank and now I just need the fuel pump assembly so I'm ready for the fuel injection.

3

Projects / Re: Panthera Motorsports 600cc in Yfz450r

« on: May 22, 2024, 08:12:54 AM »

I actually found out Panthera also supplies the exhaust.   This minimize some of the cost and headache.

I also acquired a set of LSR XC arms from a pro racer (Walker Fowler) which has titanium uppers.

4

Projects / Re: Panthera Motorsports 600cc in Yfz450r

« on: May 21, 2024, 04:58:00 PM »

Not sure why the pictures posted sideways.

5

Projects / Re: Panthera Motorsports 600cc in Yfz450r

« on: May 21, 2024, 04:57:21 PM »

And

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Projects / Re: Panthera Motorsports 600cc in Yfz450r

« on: May 21, 2024, 04:56:56 PM »

Another

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Projects / Re: Panthera Motorsports 600cc in Yfz450r

« on: May 21, 2024, 04:56:31 PM »

Langbolt, thanks for sharing.   That looks like a gen 1 yfz.  They have a bit more room between the front downtubes but I feel this pipe routing will work but Panthera doesn't agree.   However based on the yfz450r with the standard cr500 a cr500 exhaust fits.

Here is a quick mockup I did.

8

Projects / Re: Panthera Motorsports 600cc in Yfz450r

« on: May 21, 2024, 04:43:36 AM »

Panthera supplied the printed mockup 

I am not certain that they supply a kit for the trx450 but I know it would be an easier install but I opted for the yfz450r because it handles much better than the Honda in my experience.

As for the pipe.   I saw a similar build with an FMF with a 91 cr500 and it fits without modification.   However,  I spoke with Arlen and he is interested in doing the pipe but he wants the quad sent to him.

9

Projects / Re: Panthera Motorsports 600cc in Yfz450r

« on: May 19, 2024, 11:01:22 AM »

Another

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Projects / Re: Panthera Motorsports 600cc in Yfz450r

« on: May 19, 2024, 11:00:41 AM »

Another

11

Projects / Re: Panthera Motorsports 600cc in Yfz450r

« on: May 19, 2024, 10:20:54 AM »

Pictures

12

Projects / Panthera Motorsports 600cc in Yfz450r

« on: May 19, 2024, 10:05:43 AM »

J recently ordered a Panthera Motorsports 600cc two stroke and will be installing in a Yfz450r.

I have a 3D printed mockup engine and I am planning out the engine mounts.

As for the exhaust,  the biggest hurdle.   I spoke with Arlen of LED and he would like the quad shipped to him to fabricate the exhaust.   Thoughts on this???

Please share any thoughts or ideas on this project.

Thank you,

John

13

Carburetor, Intake, and Exhaust / Re: Titanium Exhaust

« on: May 19, 2024, 08:56:17 AM »

@jcs003 - Did you buy it to put a 2-Stroke in it ?

I've seen them with TRX250R Motors, Panthera 660cc Motors & a Banshee motor (which is just silly if ya ask me!) A Single Cylinder 2-Stroke would be awesome in the YFZ450 Chassis....Especially if it the Aluminum one!

I just ordered a Panthera 600.  Do you have any info on the Panthera in a Yfz450r?

14

General 2 Stroke / Re: Millennium Technology Porosity and Streaking in Nicasil coatings

« on: January 27, 2024, 07:49:22 AM »

Appears to be a bad idea in my opinion.   As mentioned could scrape oil away and throw the assembly out of balance if it not done with an attention to mass and location and the consideration to piston durability.   All those dimples are areas where three will be heat concentrations.  Just an assumption but I would avoid such a crazy approach that could probably be resolved with more clearance.

15

Engine and Bottom End / Re: I’m new and can’t find it. Port work

« on: January 27, 2024, 07:41:22 AM »

If some of the more common 250r builders are not taking new work I would recommend Ken O'Connor as he built and ported a 250r engine for me many years ago and it was more than satisfactory.