300ex vs. z400 very close

[300exrider05]

what is up i raced against a stock z400 today with my pipe, jetted, and filtered 300ex and we were neck!i love my quad.

[300ex_#387]

was it on the track or on a road?

[300ex_ryda]

This could also be the rider? Mabe the guy is a real noobie or something? was he?

[300ex_#387]

well usually if a bigger quad races a smaller one on the road the bigger one wins its pretty simple when your just shifting but if it was on the dirt its a different story

[300exrider05]

yes he is a pretty good rider and it was on even flat dirt in a rock quarry.

[300ex_#387]

wow thats weird...mines piped but we bought it brand new piped and im not sure if the shop jetted it or not it makes me think now, is not getting it jetted restricting it that much?

[RuffRyder]

That Z400 rider sucks. Period.

[DvxDirtSlinger]

a piped 400ex is pretty much even with my stock Dvx...not saying it didnt happen but the guy on the z must not be a very good rider if it did

[kd5sfq]

We have 2 400ex's, 2 300ex's and one Z400 (Z450 now.)

To put something in perspective.

A 300ex has 16 HP stock and maybe 18 HP with a pipe and air filter.

A 400ex has 29 HP stock and maybe 31 HP with a pipe and filter.

A Z400 has 31 HP stock and maybe 33 HP with a pipe and filter.


This said, in racing there are other factors like rider weight, reaction times and shifting just to name a few...

So you can say YOU riding quad A that YOU are faster than someone riding quad B. But to say a 300ex is faster that a Z400 is dreaming unless you have done some major engine work.

We built a race 300ex that will flat walk away from stock 400's and even some bigger. Yet racing it MX, much depends on who is riding it.

[YFZ450Ridr]

Originally posted by RuffRyder
That Z400 rider sucks. Period.

amen! when i was racing at the place a ride, a 300ex lined up with us and everyone, including me on my z400, smoked him from 1st to 5th gear. this is like the thread saying a raptor 350 could beat a z400 in a drag.

[ethanp87]

well i think its the rider. Every race i got to we line up with 450s,z400s,kfxs and i have left them off the line and never seen any of them agian but somethimes they leave us in the dust .

[Cody_300ex]

Originally posted by kd5sfq
We have 2 400ex's, 2 300ex's and one Z400 (Z450 now.)

To put something in perspective.

A 300ex has 16 HP stock and maybe 18 HP with a pipe and air filter.

A 400ex has 29 HP stock and maybe 31 HP with a pipe and filter.

A Z400 has 31 HP stock and maybe 33 HP with a pipe and filter.


This said, in racing there are other factors like rider weight, reaction times and shifting just to name a few...

So you can say YOU riding quad A that YOU are faster than someone riding quad B. But to say a 300ex is faster that a Z400 is dreaming unless you have done some major engine work.

We built a race 300ex that will flat walk away from stock 400's and even some bigger. Yet racing it MX, much depends on who is riding it.

I really like you, you are one of the few people who come to this section of the site who actually know wtf they are talking about. ANd yes he is right there is no way a piped 300ex will beat a z400 in a straight up drag unless you have engine work, or the z400 is stuck in 3rd gear.

[xx3003xrdrxx]

no way in hell lol my 300 is built and i cant touch a z, though i can get outta the whole quicker than a few ;)

[JRP]

theres no way a 300ex can beat a z400 unless the z400 rider sucks.. and the 300 is modded way the hell out..

[300WheelyKing]

My best freind who weighs 230 lbs. has a kfx, and I have a 300 with a HMF, filter, 14/38 gear and 18's on the rear(brand new holshots). I only weigh 160lbs. and i can't touch him. We ride everyday and no 300 will touch a KFX,Z400. Bottom line, that rider sucks,and not just alittle but sucks bad!

[yamaha101]

ya there is no way that a 300ex can beat a z400 because my friend just got a 300ex and i got 350 raptor and i beat him in 4 gear and i can keep up with a z400 on the trail

[MAaudioX10]

Here is what happened....the guy on the Z400 killed the bike on the line...so the guy on the 300EX kept on going.....

Comes on here and say...."I beat a z400, yeah me!!"

[tater_kamik]

i have an warrior that has a high comp piston, cam, exhaust and filter, and it only runs even with an slip on 400ex. i dont think there is any way with riders equal, the 300 was equal with an z400...

[hondardr4life]

The only way my 330 has ever beaten a piped z-400 is when I had 22 inch tires, and 14/36 gearing. And it was neck and neck, I edged him out by a little bit. A piped 300ex can barely beat a piped warrior if the riders are of equal skill and weight.

i think its the rider. because i've race a 300 ex with a pipe a rejetted carb, and k&n filter on the dunes and he had paddles and i still beat him when i was on my kfx 400 that is stock

[xx3003xrdrxx]

ok let this thread die , its really old and really stupid who cares , the z will blow the 300 with the same skill rider on each machine out of the water. :rolleyes:

[yamaharaptor350]

Originally posted by 300exrider05
what is up i raced against a stock z400 today with my pipe, jetted, and filtered 300ex and we were neck!i love my quad.
HAHAHA yea

[xx3003xrdrxx]

Originally posted by xx3003xrdrxx
ok let this thread die , its really old and really stupid who cares , the z will blow the 300 with the same skill rider on each machine out of the water. :rolleyes:

[Cody_300ex]

Originally posted by xx3003xrdrxx


Practice what you preach.

[440bigborekit]

the other day i was at the drag strip with my pipe and filterd honda civic and i was neck and neck with a stock skyline gt-r34 v-spec on the 1/4 mile i love my car!!!!!

this is how much sence you are making dude face it the z400 rider sucked he shoulent even be driving a quad.

[bwamos]

I'll go along with most here. The stock z400 should smoke a standard 300ex. Shouldn't even be close. Perhaps he changed something in the intake/exhaust area and didn't rejet, making him loose power? Or he's messing with your head.. lol.

The difference between a 300ex and a z400 is about the same as the difference between a 400ex and a YZF.

[Built_300EX]

First off, this is what I seen.
"i have an warrior that has a high comp piston, cam, exhaust and filter, and it only runs even with an slip on 400ex. i dont think there is any way with riders equal, the 300 was equal with an z400..."

For one thing a Warrior has 2 valves. 300EX's have 4. The piston size of a Warrior and 300EX isn't too much of a difference, nor is the piston size of a 400 and a 300.
Seeing as how a 300EX is 282cc I really wouldn't expect much out of one either; however, I own one. I also owned a 350 Warrior, with a K&N filter, DG silencer and header, jet kit, and geared for more top. When I got the 300EX I noticed there wasn't really too much difference in the quads, honestly. The 350 has way to much bulk to it, for another thing the 2 valves just didn't give it the power that they should have. I road the 300EX a bit more, after a few weeks, I invested in a DG silencer/header, jet kit, K&N filter and geared it 14 - 38. Meaning I just upped the front sprocket by 1. I than went back to the original Warrior I had, after it being rebuilt, broke in with a high compression piston placed within it. My brother raced me several times and he was more of a skilled rider then me at the time due to the fact I only had a racing quad for maybe 3 years tops and he had been riding and racing his whole life. I left him setting, time after time, after time. Continously he was left behind majorly, I mean 4-5 quad lengths behind me. After that, I decided to continue working on the 300EX (The warrior was no longer mine btw) I now have it running with a KFX 400 2004 or 2005, the year before they upped the rev limiter by 1000 on them. Also a Z400 with the new rev limiter. It gets me in top in, I usally run them 300-350 feet. By the time we reach the 300 mark they are usally either inches ahead or we are neck and neck. This is on hard top btw. This is with the races when we have about the same take off. A 400EX with a slip-on or a full exhaust, rejetted and with a filter I can still out run, bottom mid and top. NOTE: VERY VERY close race.
I have a decent bit done to my 300EX. Such as, 400EX aftermarket 41mm carb (Edlebrok), 11:1 high compression dome piston (Wiseco), gearing is 15-36, DG silencer and header, K&N air filter, 400EX stock battery (nothing big about that), Maxxis Razr front and back tires, large port and polished job, trail tech speed ometer (don't buy, it's a big waste of money due to the fact it doesn't calculate very great, it's around 3-5 mph off)and a few other things. This has made a LARGE difference from the stock 300EX with a header the size (round) of a quarter running only 61-63 stock. But yea, people don't down a quad. They have their own attributes to them that make them great and most any quad can be brought to life, it just takes a rider and some money. Anyone with a head between their shoulders should know that but I figure most people that post on here are around the age of 10-15 seeing as how they brag WAY to much etc. And the ones that aren't that age, don't take it offensively I said most.

If you want to hear more about this just msg me on ICQ or AIM. I'm on ICQ more then anything. For the authorization just put from the ATV forums.

Btw, just don't post things saying "It can't be done etc..etc.." Because it has and I can get videos soon once everyone stops being asses about it and will get out and ride in the colder weather with me. lol