I've seen the CAD for the 7 port they've been testing, which I'm assuming is the same as the 5 port, plus 2 thin exhaust ports at the top. The reason there may only be a 5 port is I'm told the powerband on the new 5 port theyre testing is extremely wide. Punchy like a GX-5, but winds out like a GX-7. Only more power than both w/ better mileage.

Easiest way to describe it is instead of "fangs" the ports are worked so that theres more efficient flow between the ports. i.e. if there's resistance going into one port, the bypass ports are going to be more effective. outside of that, I cant say anything that wont give it away. Front intake port is worked too, all of which is a change from the current and previous generations.

I will say this- Everything on these motors is new. From the ground up. The only thing that remains the same is the bore and stroke. That said, I'm told the new P/R/S will retrofit into the GX block. I obviously havent been able to do this myself, but you can bet I'll be trying it as soon as I can!

I already have a GO engine with the punch of the 5 port but winds out like a 7 port..called an MG66

Quite right Gizz. Be interesting to see how the two motors compare as far as performance and price. I get the feeling this is the factories reply to Mark's little monster.
Good for the customers to be able to have a choice though.

cant wait to see the new mill!!!! only because the last gx series should go down even more in price....

wow, new 5 port?? awsome...cant wait to test them out

dont think ill be gett'in rid of the new GX7R anytime soon!!!! thing screams!!!

BINGO!!!!

Not quite. This is a completely different design. A true gen 6.

What do you think the mg-66 is?

will they be forsale as a combo??

and where we be able to get one?

that to!!! lol, ill be running only GO engines next year, need a few more combos!

hope everything went well with the surgery RUNNE! sent you pm

should i expect a responce runne? still havent gotten one from the gx7r i sent you a month ago, so bought one else where...lol

Oh yeah. Don't be throwing that 7 Port away. They are one sweet buggy motor for the price. They are kicking butt at meetings here.

Don't know yet. It might come with the 2072 ? The GO factory is playing the cards on this new motor pretty close to their chests. It's looking like there will be some sort of press release around the end of December. I beleive it's in it's final testing stages now. It looks like it may be ready for distribution to dealers around March through May 2011 - no firm dates or time line yet.
The Chinese New Year is in February, which means production will cease for a whole week, which really relates to a 2 or 3 week delay as the factory shuts down completely.


Hi Matt - Hopefully through the already established GO dealer network. Should be no different to the supply of the GX's etc.

let me know runne? thanks