keep up w/ a 400

[GTXBrad]

Hey I gotta 97' 300EX w/ a K&N filter and my buddy just gotta 99' 400EX w/ a K&N and both are basicly stock ...I just wondered what I should do to beable to keep up with him...I rode his bike and its gotta whole lot more bottom end and top end...I don't wanna out run him I just want to have some ideas what to do w/ my bike to keep up w/ him pretty good. also...price doesn't matter
And help??Thx

[Big - D Racing]

330 big bore kit

[spurgin]

330 kit, good pipe, and rejet kit.

[luvmyex]

sell it and get a 400.Unless you put ALOT of money in it.Its not gonna stay with a 400 in a race.Woods yes,but not in a drag.

[GTXBrad]

wow a 330 kit will keep me runnin with a 400!!:eek2: That is awsome...I have some money saved up for the pipe already and I can rejet for nuthin...does anyone have a link to were they sell 330 kits? and also is there any other kits bigger that the 330? I mise well go all out..thx

I told him to give me a month and I'll be outrunnin him...awsome...:devil

[GTXBrad]

Originally posted by luvmyex
sell it and get a 400.Unless you put ALOT of money in it.Its not gonna stay with a 400 in a race.Woods yes,but not in a drag.

Can't, I'm not done paying for this bike and also I like it for various reasons...its easier to manuever than the 400 and 99% of the 400's around here are bone stock...I would like to pull up beside one with my 300 and smoke his @$$:D

[Chanman420q]

i think hetrick has 330 kits

[spurgin]

Hetrick has a 330 kit for 300ex im not for sure about the $ but they seem pretty resonable for all the 400 stuff. Thats where im going to get my engine kit from.

[NoWingNoPrayer]

HOnestly man with the money you put into your 300, if your buddy puts half that much into his 400 he will prolly stil outrun you.

[01_300ex]

yeah but some people just like the feeling more on a 300ex then a 400ex. I would rather ride a 300, just because i am more comfortable on it.

[Moded86R]

Yeah me and my buddy(modded86R) are going through the same thing he is putting all his money into his 300 cause he wants it to beat my 400, my 400 is almost stock, its got renthals quad bend bars, k&n filter with outerwear, and rejetted, his 300 has razr's fronts, rejjetted, grinded welds, and thats bout it and my bike blows him a way in a drag, but he was pissed cause his bike won't keep up.

[GTXBrad]

Originally posted by NoWingNoPrayer
HOnestly man with the money you put into your 300, if your buddy puts half that much into his 400 he will prolly stil outrun you.

Like I said earlier 99% of the bikes here are stock...and I know my friend will never mod his..maybe a pipe but thats about it.
And yeah I feel WAY more comfortable on my 300 than his 400.
Thx for the help everybody.

[Moded86R]

j400exrider log off my name!


And my bike will beat your your here shortly give me till summer time.

Yeah I feel way more comfortable on my 300 to.400's Feel weird to me.

[stocktires]

Originally posted by GTXBrad
Like I said earlier 99% of the bikes here are stock...and I know my friend will never mod his..maybe a pipe but thats about it.
And yeah I feel WAY more comfortable on my 300 than his 400.
Thx for the help everybody.

Brad, (also my name, lol)
What people are telling you is true, the 300ex ISN'T WORTH SERIOUSLY MODDING! The entire quad, the chassis, motor, suspension are ALL very crappy compared to a 400ex. You 300ex WILL NEVER be a better quad unless you have $4,000 laying around to dump into it (which is a HUGE waste of money when you can just buy a 400ex).
People on here are not trying to lie to you, only trying to help, I put $1,500k into my old 300ex and it SUX compared to my friends stock 400x. Its just a MUCH wiser investment to save up for a 400x after you pay the 300x off.

To be able to hang with his 400ex through trails, straight lines, mx, tt will will have to spend ATLEAST $3,000

[Steve-o 400EX]

If you really want something fast listen to me.

First of all, do what stocktires said and ditch the 300ex, the suspension, frame and just about everything else on it is very low performance. If you get a 330 kit you will have to get a whole new suspension to get all your money out of it. The stock suspension will not be able to handle what the 330 kit will put out, if you talk to most of the people on here they will say suspension first, then motor. Secondly, you could buy a 400ex for the amount of money you will have to put into the 300. You will also never get your money back out of it. You will have spent $4000 on it and you will prolly only be able to sell it for $2500. BIG WASTE OF TIME AND MONEY! To beef up the 300 right you will need all of this- 330 kit, Carb, polished head, Shocks, +1 or 2 a-arms, cam, hardened rockers, valvesprings and possibly valves. And after all of this a piped 400 will still give you a good run for your money.:ermm:

[Moded86R]

The reason I am fixing up my 300 and not a 400.#1 it was my dad's and I will never get rid of it.#2.J400rider has really gotten a big head here recently about his 400 and giving him a smack down with the 300 will be my pleasure.

Also I already have works shocks coming.Aftermarket tires on it.And Plan on Axle adn 400 A-arms.I am trying to get the money for a hetricks exhaust.And then I am going to get a 400 carb after the 400 A-arms.Then I guess rear shocks.And then finally a big bore kit.Maybe a 330.Probably smaller though.

[Steve-o 400EX]

Originally posted by Moded86R
The reason I am fixing up my 300 and not a 400.#1 it was my dad's and I will never get rid of it.#2.J400rider has really gotten a big head here recently about his 400 and giving him a smack down with the 300 will be my pleasure.

Also I already have works shocks coming.Aftermarket tires on it.And Plan on Axle adn 400 A-arms.I am trying to get the money for a hetricks exhaust.And then I am going to get a 400 carb after the 400 A-arms.Then I guess rear shocks.And then finally a big bore kit.Maybe a 330.Probably smaller though.

I'm not tryin to badmouth a 300 or anything, just givin my opinion. But if you are planning to do all of what you just listed, its not a bad atv. Basically what you listed is everything you need to do to make the 300 competitive. I would go with a Hetrick 330 kit, the smaller bores cost almost as much and dont produce the power.

[ZSK]

Drop in a 350x engine. You can mod that to produce some wicked power. I've heard of about 420cc and 40+ horses. If you have to stay with a 300ex based engine it can be bored and stroked to 416. 416 vs. 400 who's gonna win that battle?:devil

[Moded86R]

Well the 416 that is bored and stroked will win for 5 minutes until it blows up!I am not sure you can make take an air cooled motor and increase displacement by that much without making a time bomb.More displacement=more heat.To much heat=kaboom!

I am not sure what I am going to right now.I am not very happy with my bike at the moment.

Here is a tip for everyone.


When trying out new works shocks.Check to see if chain is properly tightened.Before hitting a large hill that sends you 25 foot distance and a good 6 foot up over a road.The chain may be loose and come off causing you and the bike to be propeled downward at a weird angle at a high rate of speed.Luckily the works shocks worked good enough that you don't fly over the bars and be turned into a "spuirt"

[Big - D Racing]

that big of engine will ruin the frame. That frame is made for a 300 not a 416. just stick to a 330

[Moded86R]

Originally posted by Big - D Racing
that big of engine will ruin the frame. That frame is made for a 300 not a 416. just stick to a 330


I hear that.Whenever I go from my 300 to my buddies 400.I am like whoa nelly!The front end is a heck of alot lighter and lots more power.I don't know about that much power in my a 300 frame.



I think I am getting soft with all these 4-strokes.I miss my R!One day again my freind.One day.

[2fastandfurious]

SELL! an buy a 400ex

[Burden7]

that big of engine will ruin the frame. That frame is made for a 300 not a 416. just stick to a 330

I disagree with the frame not being able to handle that big of a motor. I have a 350x that has been big bored to a 452cc in a 250x frame and the frame is holding up nicely. I have had a 350x motor in the same frame for about 6 years now and no cracks. The frame is twisted a little bit from using a swaybar for 3-4 years, but a 400ex frame will do the same thing after awhile.

[mxracer08]

i dragged my buddy w/ a 02 400 w/ a r-4 pipe and we were dead even in 5th gear, and i don't have a 330 kit

[R1derboy]

Plain and simple. Learn to outride him. If you're a better rider you will get there first.

If you plan on just draggin get a banshee.:D

[01TRX300EX]

Yeah, just mod your 300 out. I know what you mean about not being comfortable on a 400EX, I think the gas tank area is to wide on it personally, kinda feels like a Recon. Plus with the 300 you can keep reverse. The frame probably won't do anything, there is nothing wrong with it at all, its very strong. And also, just learn to ride a little better and it will be no problem, I beat 400's at the MX track for goodness sake, so rider does have a lot to do with it. If your going to get any 400, make it a Z400.

[BMB023]

I can keep up with a 400ex easily, my friend can 2 well a little he has a cr250 haha lol :devil

[R1derboy]

But can your friend keep up with another CR250? :D

[honda250xrider]

Brad, (also my name, lol)
What people are telling you is true, the 300ex ISN'T WORTH SERIOUSLY MODDING! The entire quad, the chassis, motor, suspension are ALL very crappy compared to a 400ex. You 300ex WILL NEVER be a better quad unless you have $4,000 laying around to dump into it (which is a HUGE waste of money when you can just buy a 400ex).
People on here are not trying to lie to you, only trying to help, I put $1,500k into my old 300ex and it SUX compared to my friends stock 400x. Its just a MUCH wiser investment to save up for a 400x after you pay the 300x off.

well 1500$ got me far enough to beat a stock 400ex :p

[honda250xrider]

Moded86R

i have heard of people have good luck with 416 kits on there motors, believe it or not, one of the factors are regular checkup, new oil every week and oil filter, run only high octane gas, and have a low enough compression piston so they can be somewhat reliable, and a oil cooler ;)

[Brad]

BRADS MY NAME 2

TC cam, 330 big bore, race pipe and rejet

that will run u around, well alot, so if ur not concerned about money that i suggest all of the things above. but the easiest thing is a pipe and rejet that will perk it up but not beat a 400

[Steve-o 400EX]

Originally posted by honda250xrider
Brad, (also my name, lol)
What people are telling you is true, the 300ex ISN'T WORTH SERIOUSLY MODDING! The entire quad, the chassis, motor, suspension are ALL very crappy compared to a 400ex. You 300ex WILL NEVER be a better quad unless you have $4,000 laying around to dump into it (which is a HUGE waste of money when you can just buy a 400ex).
People on here are not trying to lie to you, only trying to help, I put $1,500k into my old 300ex and it SUX compared to my friends stock 400x. Its just a MUCH wiser investment to save up for a 400x after you pay the 300x off.

well 1500$ got me far enough to beat a stock 400ex :p

Exactly, I couldnt have said it better myself.;)

As for a z400, I dont recommend em. I just dont think they are built as well as the 400ex. Whatever you do, GO HONDA!!

[phatswinn]

Originally posted by R1derboy
Plain and simple. Learn to outride him. If you're a better rider you will get there first.

If you plan on just draggin get a banshee.:D

exactly what he said, just go out on the trails everyday and ull be beating the crap outtin him when he wants to race, thats why i dont need a 400ex cuz ive ridden the same trails since i was 7 then when i bring my friends over and they have 400ex's and rapturds they get beat because they dont know the trails

[96300ex]

all you need to beat a stock 400ex is to break it in right, pipe it, and jet it right, a tuned 300 could beat a 440 if its not set up right. So many guys like to throw together a pile of performance parts, rather than make it run to it's fullest potential. My stock 300ex (stock meaning no motor work) will F*** up a stock 400. Calm down kiddies and quit putting down the 300, i got something that could rip up 99% of the quads on this site (that includes banshees and craptors) Don't try and tell me a 300 isn't worth modifying:rolleyes:

[stocktires]

Originally posted by 96300ex
all you need to beat a stock 400ex is to break it in right, pipe it, and jet it right, a tuned 300 could beat a 440 if its not set up right. So many guys like to throw together a pile of performance parts, rather than make it run to it's fullest potential. My stock 300ex (stock meaning no motor work) will F*** up a stock 400. Calm down kiddies and quit putting down the 300, i got something that could rip up 99% of the quads on this site (that includes banshees and craptors) Don't try and tell me a 300 isn't worth modifying:rolleyes:

[kicker696]

if i were you i would buy a 350x engine and throw that into the 300 frame, not only will you be alot faster than a 400 then, you will also have the ability to go bigger later on if yoou want to, to like a 410 or somthing of that nature. you can go to www.powroll.com for the kits, and all the info, granted the engines aren't included in the kit though.

[Steve-o 400EX]

Originally posted by 96300ex
all you need to beat a stock 400ex is to break it in right, pipe it, and jet it right, a tuned 300 could beat a 440 if its not set up right. So many guys like to throw together a pile of performance parts, rather than make it run to it's fullest potential. My stock 300ex (stock meaning no motor work) will F*** up a stock 400. Calm down kiddies and quit putting down the 300, i got something that could rip up 99% of the quads on this site (that includes banshees and craptors) Don't try and tell me a 300 isn't worth modifying:rolleyes:

First of all a 300ex with no motor work can not possibly in any way beat a stock 400. My best friend had one that was decked out with all you can do to a stock motor, and when my 400 was stock i would still kill him beyond a measureable amount. Its impossible. A well built 330 can beat a piped 400, but without motor work a 300 doesnt have a prayer.:rolleyes:

[250x#93]

Burden7,

That quad must run like he!! Post a full size pic of it.

I will get a 350x engine someday!!!:devil