anybody konw this info it would help out alot

By far the 800efi, two totally different machines...

The 800EFI will run next to a lot of sport quads in a drag race, the 660, not so much. overall, the 800EFI is WAY faster. also, dunno if the 660 will pull the wheels or not, but the 800 definetely will.

the 660 grizzly is the slowest big bore i've ridden.

I had a guy tell me his gutted "raptor sounding" grizzly would run 80 and outrun every bigbore. I laughed at him.

dude, when r u gunna stop posting the same thing over and over again? its always the same questions. how fast does the grizz go?.... how fost does the honda go?.... how fast does the 800 go?....... which one is the fastest?...... do they have a drive shaft? u could just make one thread bout "which quad should i get" or sumthin like that and ask all ur questions in it instead of making 10 million threads bout the same thing. every other thread i see is posted by u.

800efi owns you.
its fast.
2 grizz 660's in our riding group, and they are the slowest in a drag race vs honda sp 700 and sp 800.
they are great for the mud and trails, IMO.
lil tighter turning with them, and in slopping mud, they dont sink as fast, and can go threw some holes my 700 cant.
its near 100 pounds lighter, which helps it greatly.
awesome machine, but its no comparsion to a sportsman.

actually i kinda wondered which is faster and i like the fact that he posted this question. i always thought the Grizzly was kick-ars fast and i couldn't wait to read this topic!

i took a look at your ATV pics Grizzman and that is one mean looking machine! i think the current Polaris front end looks odd. (but i like the secure front storage).

a 600lb, 660 engine, MUST be fast! and i'm curios to test ride one someday.

ride safe out there!

~MT

Im with you pockets I like the post.....

they cant keep up with my SP 700 carb