So you saying Curtis Sparks can't build a 300EX motor that will smoke a 400EX? My motor is putting out over double the HP it came with factory AND I have a weight advantage. You have never ridden my quad so how can you say WHAT it is capable of? You don't even know what all has been done to the motor so I doubt you are qualified to tell me how it runs. Sorry I am not trying to be mean I am just telling you the facts...

I guess next thing you will be telling me that my 250R can't possibly be putting out 60hp....

 

OK guys,,back to the original question,,,I just got Z250 and don't have it broken in yet and have not had a chance to run against anyone yet but I can tell you that it runs pretty good and I would not be a bit surprized if it will run neck and neck with a 300ex or maybe even walk away a little bit...
If you guys get a chance to ride one,jump on you'll be really surprized at how well it runs and seems to jump and land pretty good as well,not to mention that it wheelies like a bit#@...
I will be getting my slip-on sometime this week and will let you guys know how much of a differance it makes....
Does anyone know if the Yoshamura has you rejetting with thier slip-on??????and is anyone else making a slip-on yet ???
I'll be putting some pics of my bike up soon......


Spanky--------out

 

HAHA ....... I believe you now I took my Ozark over to Curtis Sparks. He did some stuff to the Engine now it hits 69.5. The Cop down the road radared it for me. It took a few miles to get up to that speed but I did it.







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Oh yeah It has twice as much horsepower than a stock Ozark. Plus I have a weight advantage.







Thanks Charlie LMAO

 

First of all I doubt you know what your talking about anyway. First you say the Z250 is automatic. Then you say your 300ex was hitting over 60 stock when it can't. Then you say it is rider error. YOU HAVE NEVER ROAD THE Z250 SO YOU DO NOT KNOW WHAT ITS CAPABLE OF! Also how do you know that the Z250 isn't as powerful as the 300ex? Did you dyno that to? All that stuff your talking how can we believe you?

 

Exactly why can't a 34hp, properly geared 300EX hit 72mph?? A 26hp 400EX can hit 66. Bump up the power and change the gearing and..BAM! 70 plus mph.

Truthfully, I don't see a Z250 outrunning a 300EX. Not stock for stock. The auto clutch and shaft drive eat up quite a bit of power. Nice snappy machine I'm sure, but not quite a 300EX.

Ozark,
Have YOU ridden a 300EX?

 

ok this is how it goes for stock drags for sport biggener type quads

blaster
300ex (close could be made up by rider)
Z250
250ex

i know the 300 is a little bit older technology but with drive shaft and auto clutch you losing hp. not to mention the 300 has around 50 more cc on the 250. I wouldn't be suprised if the z250 will beat a 250ex as the ozark beats a recon.

and as for the 300ex top speed anything is possible with money and some gearing and tire changes. i have to aggree 70 sounds pretty extreme on a 300ex, however if she truly has 34hp that would make it comparable with a stock shee or rappy. with the weight advantage using those stats it is possible. on the other hand if you got 34hp out of a 300ex it can't be the most reliable machine.

but it doesn't really matter that much what more important is that you have fun and learn how to ride. the z250 looks to be a good machine and they are starting to fill the gap between a mini and a blaster/300ex.


just my 2cents....

 

does anyone know what the largest kit for a 300ex is? and also who makes it? and also what are their hp claims? seems like it would take a lot of work and money to double the hp on that 300cc air-cooled engine, but then again I am no mechanic....

 

SpankyLowe,

The Yoshi slip on doesn't need to be jetted unless you make other mods like Airbox or Filter. I have spent a little bit of time on my Wife's Z, and I will say this, it is a Peppy little Quad. The Yoshi seems to help out on the top end. With a filter and jetted right, it will be a screamin unit.


As far as the whole Z250 vs 300EX. If we are talking STOCK for STOCK, I don't believe that the Z is faster. I used to have a Lakota Sport 300, with a pipe. My Buddy had a STOCK 300EX, and although it was close, the 300EX was still faster. However, my wife's Z250 with a Yoshi slip-on, would also beat my old Lakota (Sold the Lakota to my Nephew and raced the two of them, so I know for a fact.), so I could see our Z250 with the pipe keeping up with a STOCK 300EX, but then again, the Z isn't Stock then is it? Concidering the fact that the Z250 is roughly 50cc less, that says something about the performance of the Z250.

 

The Z250 has and auto clutch setup just like a utility quad.

The 300EX has a bigger displacement so yeah more than likely it has more power that and the fact that the Z250 has that power-robbing driveshaft also setup like a utility quad.. That and the fact that being it has that driveshaft you can't change the gearing in it very easily...

No I never tried the Z250, I did try the Z400 when it first came out. I test rode the first one that came to the local dealership... I wasn't that impressed with it, so why would I even consider trying the 250 model then? Not saying that is isn't a good BEGINNER quad, it just isn't one I would be interested in having so therefore why would I bother with testing one?

If you know anything at all about drag racing you do know that given 2 identical powered quads, whichever one has the least weight (this also includes the weight of the rider) that the lighter one is going to be faster.... I seriously doubt you weigh less than 115 and considering that any quad with me on it is going to be faster than the same one with you on it.

How do you know that the guy on the 300EX that got beat by the Z250 didn't miss a gear while shifting or maybe wasn't that quick with the clutch? thew guy on the Z250 since his was an auto, all he had to do was pop it up to the next gear. Kinda don't have to have that good hand-foot coordination on one of those. So how do you know it wasn't rider error on the 300EX's part?

As far as me not knowing what I am talking about let me clue you in on a few things you probably don't know about me...

1. I am a Journeyman machinist by profession - that is what I do to pay for my hobbies...

2. I used to run NHRA drag races until I got too serious about it and it lost the whole "fun factor".. I ran Pro and Super/Pro classes in my S-15...

3. I had Curtis Sparks build me an engine and I did some machine work to it also... If you had spent a couple thousand having somebody build you an engine wouldn't you be a little curious as to what kind of power increase you got out of it?

OH somebody was asking about the reliability of that motor? So far it hasn't been too bad, but I also know it is just like the motor I built for my S15, when you start getting into the higher hp engines - the further away you get from stock, the more the reliability decreases.. Reliability isn't really the issue with these motors - you just have to do your maintenance religiously. You keep the maintenance up then the motor will last.

4. I am also the owner of a Quadzilla so you know I must not mind working on my stuff....
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5. If I ride a Quadzilla and have a race prepped Honda 250R then why in the world would I really care about a Z250? The 300EX is my play quad - I just wanted to give it some pep so it would be more in tune with the rest of my quads. I was just telling you what I was getting out of it.

6. Remember Ozark, you were the one who came off with the big bad attitude problem...