400ex Speed Simple Question

[400exrapes]

many little baby quad riders think there quad can hit 60mph on a 250ex and tells me a 125 pound rider that my quad will only hit 65mph, what speed will a 125 pound 5 foot 8 dude max out on a 2001 400ex w/ a 152 main 42 pilot hmf slip on pipe(i know that wont help the top speed just sayin)

[northwest Texas]

For some reason, 67mph sticks in my head for the 400EX. That would be pretty close, +/- 2mph

[hornetgod13]

I got my 400EX up to 65.1 mph before I started the mods on my quad. I got it up to 68.3 with all the mods installed with the exception of the new rims, tires, and skid plates. With the addition of heavier wheels and the added weight of the full skid plates I'm certain it's slower. I'm 6'2" and weigh 235 lbs. With a lighter person I'm certain it would be faster. Tire size and front and rear sprockets have everything to do with it. I have stock sprockets on my 06' (14 front and 39 rear).
The speeds were registered on my trail tech computer and hand held GPS.

[firefighterjosh]

66 - 70- MPH give or take a couple.

[rescue6]

Top speed has to do with final drive ratio and tire size

[DF400ex]

I've been paced at 69 using my buddies car. All I have is in my sig, the final drive is different to. I actually got to 74 by drifting behind him (like 3 inches from his bumper). I deff wouldn't recommend that though. Thinking back on it, it was pretty stupid.

[hornetgod13]

drafting

[redline400ex]

70 mph ;-) stock 400ex geared

[DF400ex]

Originally posted by hornetgod13
drafting

lol, yeah that's what I meant, darn spell check.

[dabrowat]

The previous owner got to 85. It has a bore kit, k&n filter, white bros exhaust, oversized tires.

[ida400ex]

when mine was bone stock i hit 66.4 with my garmin GPS. i raced and beat a DVX with a full yosh on in navada. :p

[jsmith2232]

It all depends on gear ratio and tire size, engine mods will only help you to get there faster, with the exception of a rev box that will allow you to achieve a higher rpm. I clocked mine as listed in my sig with a gps at 69.2 on pavement. Here is a gearing calculator that could be useful.

http://home.earthlink.net/~gellett/400ex.htm

[400exrapes]

thanks man thats what i was looking for i was hoping someone would post it

[idro]

dudes im sorry but i dont think my quad feels like 70MPH when i get on the road and let it rip.

Although a buddy of mine was behind me in his car and he was at 45 and said i was pullin away steady. so if i had to say 50-60 tops.

[hornetgod13]

Originally posted by idro
dudes im sorry but i dont think my quad feels like 70MPH when i get on the road and let it rip.

Although a buddy of mine was behind me in his car and he was at 45 and said i was pullin away steady. so if i had to say 50-60 tops.

Try shifting to 5th gear. :D

[idro]

Originally posted by hornetgod13
Try shifting to 5th gear. :D

pffttt lol

i know my quad is crazy mad fast tho. Pulls like a bandit up against my friends 450R. I know how to represent. :cool:

[below100hz]

well i happen to have a radar gun and my quad hit around 68 back in the day...
havent done radar with my 426 kit and everything else yet but i have raced my buddies car and he just started to pull past me at 90

[krt400ex]

Originally posted by below100hz
well i happen to have a radar gun and my quad hit around 68 back in the day...
havent done radar with my 426 kit and everything else yet but i have raced my buddies car and he just started to pull past me at 90

no offense or anything, but unless you made some major gearing changes there is no way a 400ex is going to hit 90...not even with a 426

[DF400ex]

Just to overcome the wind resistance at that speed you would need some serious power. It's not that I do not believe you, but 90, wow. Maybe with taller gears and nitrous, lol.

Can typical ATV tires take that speed. If I'm correct, to lowest rating for car tires is only like 87mph. I doubt that ATV tired would take that, unless you get radials.

I'd hate to have a blowout at that speed, lol.

[krt400ex]

Originally posted by DF400ex
Just to overcome the wind resistance at that speed you would need some serious power. It's not that I do not believe you, but 90, wow. Maybe with taller gears and nitrous, lol.

Can typical ATV tires take that speed. If I'm correct, to lowest rating for car tires is only like 87mph. I doubt that ATV tired would take that, unless you get radials.

I'd hate to have a blowout at that speed, lol.


they can handle it, and the stock 400ex tires are radials.

it is hard to get a stock bore 450 to get that fast...let alone a 400ex

[400EXTRA]

I SEEN IN A MAGAZINE THEY DID A SHOOTOUT ON A 02 400EX AND SOME OTHER QUADS AND THEY CLOCKED THE 400EX AT 68.2 MILES PER HOUR IT WAS ALL STOCK THATS REALLY ACTUALLY PRETTY FAST

[400exrapes]

alright well you all can be accurate but im only 130 pounds and im pretty sure with my hmf pipe ill get above 70 prob about 71 or 72

but wheni ride my fat neighbor on the back which will bring us to the equivelent ofmaybe 280-290 then it loses alot of speed but will hit about 67 around where your all talking about

[Pipeless416]

Originally posted by 400exrapes
alright well you all can be accurate but im only 130 pounds and im pretty sure with my hmf pipe ill get above 70 prob about 71 or 72

but wheni ride my fat neighbor on the back which will bring us to the equivelent ofmaybe 280-290 then it loses alot of speed but will hit about 67 around where your all talking about

i must be a cow at 160.. anyway this should answer you're question; gathering from all of the other posts, a stock 400ex will do about 65-70. yay, no more arguing required. :macho

[400exrapes]

well the whole reason i asked the question is because some sissy kid thinks his completley stock 2006 250ex will do 65 and a 400ex will MAYBBBE do 70mph and if his 250 goes 65 then my 400 goes atleasstt liek 100 cuz 250ex's are the same engines as the 250 utility basically little girls quads

[krt400ex]

Originally posted by 400exrapes
well the whole reason i asked the question is because some sissy kid thinks his completley stock 2006 250ex will do 65 and a 400ex will MAYBBBE do 70mph and if his 250 goes 65 then my 400 goes atleasstt liek 100 cuz 250ex's are the same engines as the 250 utility basically little girls quads


the 250ex will do about 47 with the stock 22 in size rear tires on it. if he has 20s on the rear then it will do like 42. there is no way for him to change the gearing except with tire sizes because the 250ex is shaft driven

[400exrapes]

WAHHHHT haha shaft drivven little girl quad ahhh what a ***** i cant wait to shove that in his face his the schools bull ****er he lies to everyone

[hornetgod13]

See the picture below of my Trail Tech Computer. It has been checked for accuracy against my Garmin Hand Held GPS. You can see the max speed on the right hand side. That speed was accomplished with a 235 lbs rider on a level paved road with little to no wind conditions. The quad has a 14 tooth front and 39 tooth rear sprocket and all the mods listed in my signature. It was a bit scarey going that fast. I doubt I'll try that again anytime soon.

[krt400ex]

Originally posted by hornetgod13
See the picture below of my Trail Tech Computer. It has been checked for accuracy against my Garmin Hand Held GPS. You can see the max speed on the right hand side. That speed was accomplished with a 235 lbs rider on a level paved road with little to no wind conditions. The quad has a 14 tooth front and 39 tooth rear sprocket and all the mods listed in my signature. It was a bit scarey going that fast. I doubt I'll try that again anytime soon.


that says it right there...how much did that thing cost...cuz i think it would be pretty sweet to always know your speed.

BTW it is fun to be going that fast :rolleyes:

[hornetgod13]

It's made by Trail Tech. I installed the Endurance model ($80.00). It displays. Max speed, Average Speed, Trail Time, Lap Times, Total Ride Time, Trip Odometer, and Total Odometer. It also displays the current time, and you can program oil change and maintenace reminders at intervals you prefer. It lights up with the push of a button for night riding. It runs off a small watch battery that is easy to change and is estimated to last 3 years before needing to be changed.
Trail Tech also sells the Vapor model ($120.00). It's hard wired into the quads power system and does everything the Endurance model does as well as features like, Self Lighting, Shift Lights, Tachometer, Air Temperature, and Engine Temperature (still developing).
You can mount it directly to the bars at no extra cost or you could mount them like I did. I went with a set of Trail Tech Bar clamps with built in Trail Tech DashBoard and 1 1/8" Medium Bend X-Bars. They came with a replacement plastic trim piece to house the ignition key and neutral/reverse lights. They make the trim piece to fit 1999-2004 and 2005-Up versions. The bars come in 3 bends (low, medium, and high). I got the medium bend because they are nearest to a stock setting.
Here's the website:
http://www.trailtech.net/

[hornetgod13]

Here's a close up picture.

[krt400ex]

Originally posted by hornetgod13
It's made by Trail Tech. I installed the Endurance model ($80.00). It displays. Max speed, Average Speed, Trail Time, Lap Times, Total Ride Time, Trip Odometer, and Total Odometer. It also displays the current time, and you can program oil change and maintenace reminders at intervals you prefer. It lights up with the push of a button for night riding. It runs off a small watch battery that is easy to change and is estimated to last 3 years before needing to be changed.
Trail Tech also sells the Vapor model ($120.00). It's hard wired into the quads power system and does everything the Endurance model does as well as features like, Self Lighting, Shift Lights, Tachometer, Air Temperature, and Engine Temperature (still developing).
You can mount it directly to the bars at no extra cost or you could mount them like I did. I went with a set of Trail Tech Bar clamps with built in Trail Tech DashBoard and 1 1/8" Medium Bend X-Bars. They came with a replacement plastic trim piece to house the ignition key and neutral/reverse lights. They make the trim piece to fit 1999-2004 and 2005-Up versions. The bars come in 3 bends (low, medium, and high). I got the medium bend because they are nearest to a stock setting.
Here's the website:
http://www.trailtech.net/


thank you for all the helpful info. i might have to look into one of those

[krt400ex]

Originally posted by 400exrapes
WAHHHHT haha shaft drivven little girl quad ahhh what a ***** i cant wait to shove that in his face his the schools bull ****er he lies to everyone


haha, or you could just tell him hes right, and then spank his @$$ in a race in front of everyone

[400exrapes]

yeah dude your right i wish like my school had a firedrill or somethin and they all watched me completley tear him apart

[blasterheavyB]

for sure 250ex's are sloooooow i smoked one on my blaster whenever my blaster was stock and i aint no little guy trust me my 400 will probably hit around 66 or so with the gearing i have

[REDRIDDER]

stock mine does 86mph.But thats slow for mine,just kidding mine stock new was clocked at 67 mph.[SIZE=3]

[bigH]

hey 400exrapes i've owned both quads and i have to say the 250ex is a POS.......i even had the 2006 in black and it was probably close 2 one of the slowest quads i've ridden.......it makes about 12 hp (which lawnmowers make more) and it is narrow and handles like crap.....your 400ex would beat that thing so bad i have no clue why he is saying stuff those quads are a joke for performance

[BlackDevil]

Originally posted by 400exrapes
many little baby quad riders think there quad can hit 60mph on a 250ex and tells me a 125 pound rider that my quad will only hit 65mph, what speed will a 125 pound 5 foot 8 dude max out on a 2001 400ex w/ a 152 main 42 pilot hmf slip on pipe(i know that wont help the top speed just sayin)


I have an 07 400 with the following:
Full yoshi exhaust
K&N filter
Airbox lid off
180k main
Stock needle
42 pilot
Rev box
15t front
38t rear
stock 20" tires

Clocked by a handheld garmin at 74.3

[below100hz]

Originally posted by krt400ex
no offense or anything, but unless you made some major gearing changes there is no way a 400ex is going to hit 90...not even with a 426

i didnt say that my quad hits 90... just that he pulled past me when he was doing 90 in the car....as in a quad accelerates faster than a car but then the car catches up and is going at a higher rate of speed and passes....

[madeincanada123]

71

[krt400ex]

Originally posted by below100hz
i didnt say that my quad hits 90... just that he pulled past me when he was doing 90 in the car....as in a quad accelerates faster than a car but then the car catches up and is going at a higher rate of speed and passes....


sorry confused me. it sounded like he rode next to you and didn't pull away until he hit 90

[dragex400]

I have an 04 400ex with
11.1 piston
major port and polish work]
full white bros. aluminum pro exhaust
dyna FS programable Ignition
K&N air filter, lid off
stage 2 hot cams
CRJ lowering Kit, front & rear
VP110 fuel
16 t front
36 t rear
20" rear tires
96Mph

[krt400ex]

Originally posted by dragex400
I have an 04 400ex with
11.1 piston
major port and polish work]
full white bros. aluminum pro exhaust
dyna FS programable Ignition
K&N air filter, lid off
stage 2 hot cams
CRJ lowering Kit, front & rear
VP110 fuel
16 t front
36 t rear
20" rear tires
96Mph


holy chit...your serious?

[dragex400]

Very serious,

It has so much torque I had to keep gearing it higher. I have a wheelie bar on it because 1st and 2nd are still out of control. The dyna ignition lets you set the rpm and you can set the degree in timing changes, which is huge. I think the port and polish is the most important thing in all the mods. Me and my partner have well over 40 hrs. of work in the intake and exhaust ports. I had it out with a yamaslobber 450 this weekend and my 400 ate his 450. He had a high comp piston, new valves, camshaft, exhaust.

[400exrapes]

dammm dude tell me how u smoked a 450 but PM me because this threads a little old i dont want to bother other members who dont want to be bothered by the mail

[krt400ex]

Originally posted by 400exrapes
dammm dude tell me how u smoked a 450 but PM me because this threads a little old i dont want to bother other members who dont want to be bothered by the mail


lol...why dont you share your secret with all of us...i dont think anyone will mind knowing how to spank a yamy

[blasterandy]

Originally posted by hornetgod13
It's made by Trail Tech. I installed the Endurance model ($80.00). It displays. Max speed, Average Speed, Trail Time, Lap Times, Total Ride Time, Trip Odometer, and Total Odometer. It also displays the current time, and you can program oil change and maintenace reminders at intervals you prefer. It lights up with the push of a button for night riding. It runs off a small watch battery that is easy to change and is estimated to last 3 years before needing to be changed.
Trail Tech also sells the Vapor model ($120.00). It's hard wired into the quads power system and does everything the Endurance model does as well as features like, Self Lighting, Shift Lights, Tachometer, Air Temperature, and Engine Temperature (still developing).
You can mount it directly to the bars at no extra cost or you could mount them like I did. I went with a set of Trail Tech Bar clamps with built in Trail Tech DashBoard and 1 1/8" Medium Bend X-Bars. They came with a replacement plastic trim piece to house the ignition key and neutral/reverse lights. They make the trim piece to fit 1999-2004 and 2005-Up versions. The bars come in 3 bends (low, medium, and high). I got the medium bend because they are nearest to a stock setting.
Here's the website:
http://www.trailtech.net/

I kinda wonder how the tach works. Seems like it would be hard to do to an atv i may just go with the cheaper version. How does it read the speed off the wheel or what. :confused:

[blasterandy]

Originally posted by dragex400
I have an 04 400ex with
11.1 piston
major port and polish work]
full white bros. aluminum pro exhaust
dyna FS programable Ignition
K&N air filter, lid off
stage 2 hot cams
CRJ lowering Kit, front & rear
VP110 fuel
16 t front
36 t rear
20" rear tires
96Mph

holy $hit... what the he11 do ya mean holy $hit.

More like holy load of $hit.

Only a 11.1 no bb. i may want to do that if it will give my quad enuff power to pull that type of gearing ur talking about and still want to roll back.
Honestly dood what do you take us for.
alright around 70 stock ok 26mph faster thats a whole heluva big jump. yea you maybe able to get there with that but the power out put ur talking about is just outrageous.
Sry for flaming and double posting.

[hornetgod13]

Originally posted by blasterandy
I kinda wonder how the tach works. Seems like it would be hard to do to an atv i may just go with the cheaper version. How does it read the speed off the wheel or what. :confused:

It has a sensor that mounts near the right front brake rotor and you replace one of the three brake rotor bolts with a magnetic bolt. Each time the magnetic bolt passes by the sensor it calculates the distance/mph. It's all based you the wheel diameter. The instructions explain how to measure the wheel diameter and how to program it into the computer. It's pretty simple.

[DF400ex]

it reads the rpm's by the RPM sensor. This senses the each spark and converts it into rpm.