ATC 250R vs. 440EX

[Lots_Of_Nothing]

hmmm idk what you gys are talking about, but i rode my friends 440ex, with dg exhuast, wiseco piston, and a few other things, and it didnt seem like very much at all

[rippn250R]

I'm running 18in. tires and a 38 tooth rear sprocket. How does that effect my speed/acceleration. Im guessing i might loose alittle top end.

[smokinwrench]

I just put 18" turf tamers on my R. I have 13/39 gears. It is the same for acceleration. I have the exact same top end as a stock 2003 Raptor. I was very disappointed not to be pulling away from him. My top end is very slow compared to before. I will never buy any more 18" tires.

Josh

[Yardbird]

I agree with Mr. ATC that the 250R will walk away from the 350X. My buddy bought a new 250R and I picked up the 350X both brand new in 85. We were both same weight and comparable skill. Every time the 350X would jump out....1st then 2nd gear and by the time I was halfway through 3rd that 250R had wound itself up and would go by easily and keep pullin away.
I still have mine (didn't ride it for 14 years) and haven't raced any 400EX's with it but they usually don't follow me up the steep dunes and such. If what Mr. ATC says about the 400EX being similar to the 350X in power:weight I don't think an extra 40cc's of four stroke power will be enough to take the Mighty R. Especially if it's been modified somewhat.
I've been thinking of having the Powroll 430cc package done to one of the 350X's I've got. Anybody had any work done by them or know of anyone using them? http://www.powroll.com/printer_h_atc350x.htm It does look interesting to say the least as for modifying the 350X.

[TimSr]

if you still are not convinced of this, look at the TRX250R that is faster then a 400/440ex and a TRX 250R is slower then a ATC250R.

Exactly my point.

[Kilborg]

As far as raw speed and horsepower to weight ratio, the 250r reigns supreme. Ill take my 250r throw a couple bucks into it and smoke most any 400ex you can build.

[trikerider2oo7]

Who gives a rats @$$? trikes are better than quads... So lets leave it as that.

[NOS_350X]

Boy all of you must either be high or have never ridden a Honda ATC 250R. I dont give a crap how bad you make a 400EX, 440EX,or how ever many more cc's you can squeeze into that 4 stroke piece of junk. You can take any new 4 stroke 4 wheeler off the showroom floor and put whatever bolt on items you can buy and after you spend all of that money I will then show you how an 18 year old 250R will smoke your arse. And as far as those Banshees go I have out run many of those unless they have motor work and a lot of money sunk into it. And about that acceleration you guys want to brag about on your quads,just think about all that extra weight you have to hold the front WHEELS down. Unless I sit on the handlebars and put my feet on the front fender my light front end will wheelie to the sky,so us 3 wheelerguys have to feather the clutch a little more. I pop the clutch then let of the gas for a split second then nail it and let that power band pull me right past you about second gear,then buy third gear you get to read the C-YA sticker on the back. The only thing that has ever out run my 250R are a couple of highly worked Banshees. But the best part is that my R is not highly modified,But after I do some more motor work on it I may need wheelie bars.. 4 STROKE QUADS SUCK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

ok take a look/ride/race the new yfz450 and trx450 they will smoke your 250r unless you have taken a 2ed morgage on trailprotrailpro house to pay for your modds

[MR ATC]

for pure aceleration and top speed i'd put a piped ATC 250R up against those two anyday.

[Kilborg]

Look at it this way....

Your comparing apples to oranges. If honda put anywhere as NEAR as much technology into the 2 strokes as they are with the 4 strokes, it wouldnt be a comparison. We would have 70 horsepower STOCK 250cc engines (naturally aspirated). The new breed of 4 strokes are in a very high state of tune from the factory. The aftermarket will be hard pressed to gain much more power out of what is already there with the traditional methods. So basically, it took honda 20 years of f1 racing and 200 extra cubic centimeters to make a production bike that could hold a candle to the old, decrepid 250r. Great job, honda. Yes, I'm well aware of the differences between 2 and 4 strokes (something I have been very seriously studying since I was able to read and turn a wrench).

[kdagenais]

Just something to think about is on motocross (Dirtbike) racing they allow the YZ450F & CRF450R (4 Stroke) bikes run with all of the 250 2 storke bikes in the same class. If the more cc's was that big of a differnce the 4 strokes would have a separate class in its self. Like I said in the beginning just something to think about in the terms of cc comparison.

[TimSr]

May be the case where you race, but AMA, and CRA both have 4 stroke only and 2 stroke only classes which are considered advanced classes. Beginner quad classes are mixed, and Senior (30 and older) classes are mixed. They also allow 300EX and 250X to run in the 200cc Blaster classes.

[theeechozen1]

my buddies 452ex with edelbrock carb, yosh pipe, running race gas is the fastest slowhundred ex i have ever ridden, very fun bike, but my R is just piped and filtered on p3 wiesco and I pull about 1/2 bike legth every time I shift...you have to win the lottery to make those things REALLY fast

[Manny55]

Mr atc. A stock 250r doesnt have 43 hp. And the 440ex would kick the rs arse the only place the r would have a chance to win would be in acceleration. Manny make your ex a 440.

AMC, re-read what i said,...

"a 250R weighs 290 and puts out about 43 h.p. with the mods he listed"...

keywords THE MODS he listed.

so now you have two machines with about the same H.P. but one is a lighter (by about 70lbs.) 2 stroke. listen to what your saying do you really believe it.

The 250r is acutely almost 90 lbs lighter then the 400ex, the ex weighs 377 dry weight. And AMC i'm thinking about making my 400ex a 440 but it cost a lot of money 440 kit $200, then i need to get a bigger carb not sure how much those cost then for the labor for boring and the 440 kit installation. Its pretty spendy.

[Manny55]

Boy all of you must either be high or have never ridden a Honda ATC 250R. I dont give a crap how bad you make a 400EX, 440EX,or how ever many more cc's you can squeeze into that 4 stroke piece of junk. You can take any new 4 stroke 4 wheeler off the showroom floor and put whatever bolt on items you can buy and after you spend all of that money I will then show you how an 18 year old 250R will smoke your arse. And as far as those Banshees go I have out run many of those unless they have motor work and a lot of money sunk into it. And about that acceleration you guys want to brag about on your quads,just think about all that extra weight you have to hold the front WHEELS down. Unless I sit on the handlebars and put my feet on the front fender my light front end will wheelie to the sky,so us 3 wheelerguys have to feather the clutch a little more. I pop the clutch then let of the gas for a split second then nail it and let that power band pull me right past you about second gear,then buy third gear you get to read the C-YA sticker on the back. The only thing that has ever out run my 250R are a couple of highly worked Banshees. But the best part is that my R is not highly modified,But after I do some more motor work on it I may need wheelie bars.. 4 STROKE QUADS SUCK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Well thats your opinion. Talk is cheap punk, banshee's would smoke a 1985-86 250r any day stock for stock.