I've had mine for a few days and am really pleased with it. In the storeroom, the 366 is noticeably smaller that the other behemoths. Even the 400 looks big next to it. However, when I got it out onto my property, I'm glad it wasn't any larger. It just barely fit down some of my wooded trails. I took it in a boggy area and didn't have any issues.

I don't have a good area to see how fast it will go. I got it up to 45mph and it didn't sound close to its limits. The acceleration was very good. The one fault I have with it is in the turning radius. Despite it's smaller size, it turns a bit wide compared to a Yamaha that I've ridden. It also doesn't have a full size gauge. But to be honest I so rarely use one. About the only thing I ever glance at is speed, and it's right there.

So if I were mulling between the 366 and 400, I wouldn't worry about performance. It'll be close. I would focus on the size though. If you ride in tight places, I would definitely go with the 366. If you're using it for utility, then the 400 might be the better choice since the rear racks are wider. In terms of looks, I just don't get why folks consider it ugly. It's a 4-wheeler, not a piece of art or a piece of ***.

 

If the AC366 motor is made by Kymco, then why on their web site and their CD is says it is made by Arctic Cat and is a hemi cylinder? Just wondering.

Now between the two, for the slightly extra money, the 400ac offers a diff locker and low range which would come in very handy when towing or in deep mud. Also, the ground clearance is slightly more with the 400ac and it has been around for a while and has been a proven machine. Now as far as the motor sizes, yes it is only 10cc difference, but with all the other features, the 400ac IMO is the better buy. However each person must look at their needs and wants and determine which one is right for them. If you don't need the diff locker or the low range for heavy towing, then the 366ac might be the one for you. But if you are going to pull heavy trailers (ie: +1000 lbs), the 400 will do way better b/c of the low range. Just my two cents worth.

 

Listen all you guys I been reading your debate and I just couldn't take it anymore. I have owned a 366 for quite a while now, and guess what I traded in to get it. That is right a 400 2006. Here is the fact the 366 weighs 606lbs the 400 645lbs the 366 has fully ind suspension but 10 inches of clearance compared to 12 on the 400. Now I remember there was a thing about size, it sits lower than the 400 but otherwise really the dimensions aren't all that different just your eyes tell you that they are. So if your wandering which is a better machine and specially for you, my answer would be the 400 because you weigh about 250lbs at almost 6ft tall so for you the choice must be obvious for you to think about it even being close surprises me. You will only fill tight on smaller machines and face it they are very close in price. I fell in love with machine when I saw it for the first time but I will admit now that I have it I can honestly say the 400 was the better machine for the money but that is not saying that I dont like my 366 just that the 400 is really the better machine for the money and specially for you, get your wife the 250 that should be a good beginner platform. Have fun I wish my wife would take up interrest in ridding but doubt it. later Jason

 

366 vs 376 specs

There are other things beside engine size that the 400 has going for it. The suspension travel is much longer,larger tires and the gas tank is much bigger. Those 3 things alone are a big plus.

<div class="FTQUOTE"><begin quote>I just don't get why folks consider it ugly. It's a 4-wheeler, not a piece of art or a piece of ***. </end quote></div>

LLLOOOLLL!!!! I know, people think they will be using these things going down main street on a Saturday night bagging chicks or something.

 

All good points but in the end I was just giving pmdguy a honest opinion from someone that has the 366 and just had the 400. The 366 is a fine machine but really for the money the 400 is the way to go after weighing everything apples to apples and thats the truth.

 

I plan on getting a 366 for my wife. The main two specific points being less weight and less cost. She's never ridden a quad and isn't likely to get all hardcore and need diff locks and the like.

Whether that weight is the 40 pounds claimed by mossmanj or the 100 pounds claimed in the spec sheet, it's a savings on something that isn't that heavy. Even at a 40 pound difference that's about 6% less weight than the 400. That only goes up if the weight difference is greater.

Since the two motors are very close in displacement, assume neither holds a truly significant power advantage, nor a mileage difference.

The 366 presents a two fold cost savings- both the motor is less expensive and lack of diff lock options.

As for the 366 being redundant in the face of the 400, I ask why is the 400 any more viable?
It is at best 100cc's difference from the 500, with identical features. It's the 400cc machine that seems redundant to me. For slightly more money you can just get the 500, which makes the 400 a poor option in either direction.

Either get the lighter 366 with less features and pay less, or get the 500 with all the bells and whistles. The 400 is a jack of all trades type model that is really the redundant model here.

I'm not knocking it, I am just saying that looking at the model line up, I think if I were to see a redundant model, it'd be the 400 and not the 366.

 

You have a good point and it is well noted but unless you own both or have both you will not have a clear picture of what I'm talking about because it doesn't just come down to specs but you will find that out yourself after you have it in any case have fun it is still a good machine just not as good as the 400.

 

Oh by the way here are the real specs on 366 that you get in manual when you buy. overall length 82.2 inch, overall height 46.9 inch, overall width 42.9 inch, susp travel 7.5 inch, wheelbase 47.9 inch, dry weight 606 lb everything else is correct as shown in brochure.

 

that's why I come here. Because spec sheets never tell the full story. Nice to be able to ping someone that's owned the things and get the strait skinny

Edit: I went by the Cat dealer today, who helpfully just happened to have a 400 and a 366 sitting next to one another. I took a pic, don't know how to upload it here though.

The 366 does look tiny compared to the 400, but looking closely, it's largely the effect of the bodywork, and the larger tires on the 400. At a glance the 366 is dwarfed by the 400, but really- it's not too different in anything but bodywork and seat height.

That would bring the difference more to the weight difference for a smaller rider.

I also was incorrect in my earlier post, saying the 366 lacked a LO range, which it does.

I would say that the 366 represents the top of the base quad model while the 400 represents the lowest end of the premium model of quad (those with diff lock, etc)

In the end, which we get will depend mostly on price. Our Cat dealer beats the other dealers in town for comparable manufacturers by a few hundred dollars. I was quoted 7K for the 700 EFI with camo job. That's the MSRP for the 650.
My local Kawi dealer can't beat that for a 750i Brute Force or Grizzly.

 

If this is about price and it is for your wife why wouldn't the 250 be in the contest somewhere just asking.