Eric Gorr CR144 questions

Dome volume ingraved on the dome by chance?

Did you try calling millennium? Last i knew he was under their roof and how to get a hold of him. https://www.millennium-tech.net/

You know, I just sent Gorr an email about a YZ144, myself. Have not heard back yet, though. According to his website, it looks like he uses Wossner piston. (Good quality!). I am guessing you could contact Wossner and explain your situation and see if they have the one you need. Particularly if you have your old piston to measure. I've ordered several pistons and cranks from them and they were knowledgeable and friendly. The US distributer is in Ohio.

I don't know if he is in house at Millenium... the addresses are different and it looks like he uses US Chrome for his plating. I could be wrong, of course.

Not sure about the fuel question.

Keep us posted what you find out.

Does it have the old piston? If so, Eric using aftermarket stuff and you can Google the number from the piston.

On the powerband, you have to measure port height from top of the cylinder.

No, but Eric's books are a good place to look. Since it's a 125 stroke with bigger bore, it's the same port height for 125 vs 144.

You might want to call wiseco or check their website. Also, try emailing Eric. He's a good dude, but sometimes a little aloof.

I've not had any luck emailing Eric but he picked up the phone over the winter for me. Quick on the phone, no real communication regarding a cylinder replating after i sent it in, but did an awesome job quickly on the project. The cylinder just arrived on my doorstep one day shortly after sending it in.

What I'm saying is, communication may not be his strong suit.

I have a 2007 CR125 with gorrs 144 kit. Not sure how to tell what port job he did on it besides asking him. You’ll be able to tell when you ride it though. I had him port for top and the bottom was gone, I actually sent it back for the mo betta.

He uses a proprietary piston from what I gathered. It was a weisco racer elite piston. Last time he sent me one I tried looking the part number up online and had no luck. Didn’t try dealers or anything like that

In my 96 Gorr ported CR144 I use a Wiseco YZ144 piston. I can track down part number. It's almost the exact same as the "custom" one it originally came with that was discontinued...........