Does the MG-66 use the same bearings as the GX5R?

Same size.

Thanks how about the o-rings in the carb?

Everything is the same except for:

Sleeve
Crank
Crankcase (few small internal changes I believe)

I believe there were also some small changes in the carb, but the stock GX carb will work fine if you have to use one.

Okay thanks guys.

I searched this thread a bit, but didn't find what I was looking for...

Does anyone have a site where I can order Go parts? I'm looking for a P/S/R for a B21 at the moment. I don't need it yet, but will probably soon. It's a great little backup motor that I want to keep fresh, but I can't seem to find any parts for it. I know I'm looking in the wrong places....so I came here to the experts!

try here, if parts are not listed on site, throw him a email. great guy to deal with!!!

http://nitro-north.com/go-engine.html

Thank you kind sir. Just dropped him an e-mail!

no problem!!! if the rods are the same as the gx series i have a few.

There the same.

Where can I get the o-rings for the MG-66 carb. I tried Nitro-North and they are out of half the o-rings I need.

What rings do you need?
I stock all the 21 o-rings.

Moto

When I went to add the o-rings to my cart about half said not available.

I need all the o-rings to rebuild the carb. Plus 6 exhaust gaskets and the front and rear bearing for the crank case. Let me know how you want me to proceed.

I must apologize. The store wasn't up to date. I am out of exhaust gaskets (OR-0006), I have more currently on order. But I do have the other rings in stock. You could try the store now, or contact me. [email protected]

Moto

I'll order tonight when I get home. Thanks for responding.