Can you run these wide open for long periods of time?
Can you put on large amounts of miles without rebuilds?

Im being told that I dont have to run the low compression domes that with proper jetting it would be fine. Is that correct?

Any experiences with using these for trail sleds? Goods and Bads please.

thanks

How hard is it to get used to the oil/gas mixing?

Would it be worth trading a 02 MXZ X 600 two tone, 1500 miles, r.e.r., 1 1/4" lug studded track, skid plate, j hooks, taller riser, heated visor plug in, yellow rear cowl vents, yellow snow flap, yellow lower hood grills, yellow sportech headlight covers, yellow Ski Doo low windshield, Dynoport canister for one of these race sleds with less than 300 miles on it?

I wouldn't trade, stay with what you have. I don't know about where you are, but around here the resale value on the 440 is'nt good. There a specialty sled, not a cruiser.IMO

If you can run rich jetting to overcome a high compression ratio, you mileage would probably suck big time. Also, is the tank smaller than a regular ZX chassis sled?

Mixing gas & oil went out back in the early 80s. Why would you want to do that?

In Hornepayne during '01, we saw a MXZx 440 (ZX chassis, yellow w/ big black "ski-doo" decals on hood) that had a Tour Buddy decal on it plus 2 of those chain saw gas cans w/ the separate oil section, bungeed to the sled. I don't know if it had a Tour Buddy on it, but it looked like he was concerned about gas.

Yeah, the sled only has 300 miles, but was it raced? Most if not all race sleds see more abuse in a season than most sleds in a lifetime.

I'd stick w/ the 600.

This one hasnt been raced and has the larger gas tank.
Ive been thinking that I might as well stay with the 600 just for the ease and piece of mind.
thanks

Why would you want a 440? I also think I know the sled that your interested in, not personally. It's on the net and the guy wants 4500 or 5500 for it? That is way to much for that sled as you can get a 03 REV for about the same. Anyways back to the 440's

I have 2 440 x's and wouldn't trade them for anything. But they both have low compression heads. They are strong runners and never had a problem with them. As for mixing oil/gas it's no big deal. I have vintage sleds so naturally they are premixed also. For the zx's, I have a quick 2 mix container in each sled. Pull up to the pump, fill the tank and see how many gallons it took. Fill the container to the correct line level pour in and go. It takes just about as long to do that as putting on a helmet or waiting for the rest to get fuel.

I will say that both my sleds were never raced, my 97 zx I got with just 312 miles on it from a friend that I knew. My 99 Zx came from someone I didn't know, but I inspected the sled before I bought it. I'm going to be getting a 03 REV probably next year and already got one lined up and know the person riding that currently. So I know how it has been ridden, taken care of and all around general info about the sled.

I would honestly stick with the 600 IMO

I've been trail ridding a 2000 440mxzx since it was new. I love it. It came with 300 main jets. I run 280's , stock head domes, and 93 octane. Swapped the 44 cam with a 46-42. A little softer prim spring to lower engagment.

I love my 99 440x. I feel that the 440 is a better all around sled than a 600. Should take it in a race till the the very top end. I have the trail heads installed on mine. All zx 440's had the 10 gallon tank. My first time out with it I met some people that became good riding buddies. One had a 02 800 x two tone, that two tone yellow and black is still the horniest sled IMO out there. His prior sled was a 98 440x that was very fast . Any ways I was new to the 440 race sleds and wanted to see how quick these were. So I asked him to race for 500'. The first race he took me out of the hole and we stayed even till 500' when he began to pull away. Everything I heard about these 440's was true and then some. The second race I took him out of the hole and held it till 500' when he caught me. Ive been sold on these ever since. Carry a ratio rite and mixing is no problem. It sound like you have done a lot to your 6 but you can do all that to the 440. I have had no problems with my 440 and it is driven hard. The best part is beating a bigger cc sled and the owner can't believe they were beaten by a 440!

keep the 600

IMO, I do not see what you are really gaining. It is lighter, but HP and torque wise, the 600 and 440 are about the same. But what you are giving up is huge. If you drop to the trail domes, your going to loose allot of power, have to re-clutch, and bascially re setup the sled to get it to run right. Secondly, the 440 motor is high strung, it is a race engine. They require allot of maint. Other than the stiff ride and lighter weight, where are you gaining?

the 440 motor is high strung, it is a race engine. They require allot of maint. Other than the stiff ride and lighter weight, where are you gaining?

my buddies 02 440 blows plugs like a normal sled, mixing gas isn't that hard, just some people are to lazy to do it, and it can take more than a normal sled. mixing gas is the only thing different and it can and has kept up to 583's, 670's, poo 700s in 660', thats with low compression domes before he had a clutch kit.

I have had large cc sleds in my time stock and piped.
I got to drive a 440 back in 1995 and I was hooked.
I am on my 3rd 440 sled now.
My first one [97] has 10000+ kms on it. I lost a piston when messing around with jetting at -25. Other than that, never have a problem and it runs flawless.
My 2000 ZX 440 has 8900 kms on it. I lost a piston due to faulty thermostat. Removed thermostat and update with coolant choke. I beat it like a redheaded stepchild.
I now have an 03 REV 440 and put it thru the same paces.

I disagree with anyone who says that they are a lot of maintenance. They take absolutely no more maintenance than any other trail sled. I grease my sled every weekend. I shine the plastic with castrol supercleen., I ArmorAll the seat. What else do I do to it?...hmm, hmm......I ArmorAll the seat. Oh wait, I already said that.
Maintenance would mean that something wears out and must be fixed or replaced before failure. The mxzx "race" chassis is bar none the toughest chassis with the strongest steel components [moly], they have larger diameter swing arms, larger diameter front control arms, larger heim joints, larger steering bushings. larger shock shaft diameters, servicable shocks and can handle a beating where you would bend the skid frame on a consumer sled.
You whack any still object with any sled, it will fold. The race chassis is much more robust.

As far as high strung, for an engine that runs on 87 octane [which I run mine on] it does not too bad and when jetted properly and driven like a sane man, you can squeeze 90 miles out of a tank on the groomed trail. If you flog the heck out of it, then you're looking at 70 to 80 miles/tank. With a kick @ss clutch kit you would think that the engine had high compression domes installed.

I've done Thunder Bay to Ft Frances @ 290 miles each way in two days with my 440 and it was moocho fun.

Far as oil is concerned. The zx can hold 4 single liter bottles in the trunk, and can hold two single liters beside the chaincase with a powermadd oil storage caddy. Even with the 4 single liters in the trunk, you can fit 4 small bottles of iso propylene for the fuel. A Pol/Cat tow rope can be fit under the hood in the front of the belly pan and have two spare belts sitting on top of the tow rope fit between the bumper bracket and tow rope.
The side of the fuel tank can be marked for every 8 liters with a paint pen....or every two U.S. gallons. Each mark you use 1/4 liter of oil or 1/4 pint when you pull up to the pump. You look at the tank and count the lines, each line on the tank is 1/4 jug of oil. Add oil, then gas.

.....So now your zx race sled is setup for with enough oil for 420 miles after you use the first tank of fuel. Can carry 4 spark plugs, iso propylene, 3 belts and a tow rope...and look damn kewl doing it too.

The REV 440....chassis can hold 4 liters and a spare belt.

http://www.picturetrail.com/dynamo_joe
Pick albums:
440 REV Oil storage . - 11Pics
440 REV.MXZX MANUAL - 10Pics
http://pic4.picturetrail.com/VOL52/486172/1502096/17575788.jpg

Hammer down.

what Joe said. :D i absolutely love mine and wont trade it for anything. was recently asked if i wanted to trade my 03 rev 440 for a brand new 04 rev 600 x ho. i said no thanks ill keep my 440, and walked away with a big smile. you'll be a believer once u ride one. :thumbsup:

I enjoyed my '95 440 that I had for 3 winters. It had the smaller tank in the F chassis. Range was never a problem here in central Ontario. Mind you I had sold it before I started heading up to northern Ontario & putting on the big miles up there. Gas mileage seemed decent for the speeds I was running down here on the trails. I don't know how the mileage would have been keeping up to the 583s & 700s the other guys had when we were running logging roads & powerlines.

One question about the more recent "race only" MXZx sleds, how is the gearing for running @ "higher" speeds :devil: ? Could a setup closer to the 500s be swapped? Just thinking that from the factory they maybe geared more for accelerating out of the corners in sno x. I guess someone who races these sleds in cross country events would know.

Just my 2 cents.

I have had race 440s since 1996 and only lost one cylinder and that was the year I rode a cat. I am not a trail expert but they are very durable machines and mixing gas is no problem. If you have never ridden one you are in for a surprise! If you have and did not like it fine, if you are an expert on everything and think you know what you are talking about when you say they are no good on a trail, keep your opinions to yourself.

what would you gain with a 440???? you'll gain a suspension you can at least jump with....in hindsight I probably should have bought an '02 440 instead of my 700X......if you ride like a little kid, keep the 600....if that driveway approach tempts you as a launching pad get the 440...........if your desire is to fly midair past the posers on the trail, get rid of the 600..........if you're old and lazy like me who's too lazy to slow down for ANY type of bumps, get rid of the 600 (or plan on sticking $$$ into it like I'm having to do)......if you get the 440, you'll gain the respect of fellow riders who come off Yamaha Phazers, take your 600X for a ride and come off it shaking their heads, asking you HOW much did you pay for that thing???