stock hp and whats its worth thread

[timmy400exfast]

ok just wondering what the stock hp is on the ex im thinking about a motor swap this winter maybe with a cr250r or a 500 if i cand find one that needs a rebuild and this is a whats it worth also so heres the parts

itp holeshots 50% 9 inch itp rims
pro x 86mil piston
stock crank
front dunlop tires 40% dg bumper bad shape
head needs valve
stock exhast no sliencer
carb idk if stock or not
k&n
majier plastic blue
cam
front 16t sprocket
oil cooler with lines
head
block
bottom end
more just cant think of
remember its a
WHATS IT WORTH

[honda400ex2003]

stock hp is about 25-27 depending. are you wanting to sell the parts seperate or are they on the machine? I am curious cause depending on what you would want for the motor, or at least the head if it is stock. along with the bottom end if it ok still. i may want to take it off your hands. I am assuming you are just selling the parts since you want to do a swap. lol. steve

[powertechn2]

i dunno, maybe bone stock low 20's? like 22. i dunno, never had a reason to dyno mine when it was stock, i knew it wasn't that powerful.

i don't know what you mean by what its worth...

are you trying to figure out what your quad that needs head work is worth, or are you trying to figure out if its worth it to put a liquid cooled engine and do all the fab work to fit a radiator and mounts and what not just to have a few more hp?


my ex engine is built, i can only do another cam swap, do nitrous, or go up to a 500 kit now, thats all that i can do to make more power at this point. i know that my quad dyno's more hp than a gas gas ec 250 with port work done, and i dont have to mix gas, just i have to run race gas.

[honda400ex2003]

26.9 hp according to dirtwheels when they did the shootout a few years ago. steve

I usually see high 26 low 27. Depending on the dyno Dynojet says 30 is stock they run a little higher. Honda says 27.2HP

[powertechn2]

im assuming they were talking corrected hp at the crank?

im just wondering cause i have seen dyno runs with 400's piped and jetted only making 27-29hp at the wheels

[powertechn2]

Originally posted by honda400ex2003
26.9 hp according to dirtwheels when they did the shootout a few years ago. steve

its hilarious to compare that dyno image with the one i have from when i was tuning my carb in.

[timmy400exfast]

well i would probably be parting out the whole motor if i did a swap

[timmy400exfast]

lots of good parts on it and im just trying to see how much $ i could get so i could see how ,much i can spend on a motor i saw a ktm 144 with 44hp for like 780

[killer400ex]

if i were to do a swap i would go with a crf450r motor, those things haull like a mo-fo and if you could get a yz450r motor in it from 08 or 09 then you will have to probly glue yourself to the seat to keep it from ripping you off of it

[katch26]

a ktm 144 for you frame? why?

[killer400ex]

yeah man id go big or go home

[BEAVER.989]

144cc? No way. While you may be up in sheer hp numbers, you'd lose torque. It'd be a lateral move, imo.

[timmy400exfast]

if i could find a crf450r motor that needs a rebuild cause all i see is ones for like 1600$$ with that money i could by a older crf.has anyone heard good news about a yz 426.and what about cr500

[powertechn2]

the yz426 engine is the same as a 450, just different displacement, you also can find wr/yz 400's. the 426's had Ti valves, as do the 450's.

[timmy400exfast]

the 426 motors are alot cheaper than the 450s

[powertechn2]

i had a wr400, found a shops site that claimed they could get over 48hp from doing their porting... i just didnt ride teh bike enough to justify doing the work, hell, i sold it for $2k like 3 weeks ago with 440 miles on it lol still looked new.

http://i278.photobucket.com/albums/kk106/powertechn2/special/bike1.jpg

the only thing is that if the user didnt keep their valves in check, then you could have issues, but you could check that all before you put it in.

[timmy400exfast]

wow,i wanted to try a cr500 or a cr250r but idk now

[powertechn2]

like i say, thats what they claimed, it did have a dyno sheet, but ya never know.

i would stay 4stroke myself, but just cause i dont like mixing gas, and i like trails and torque

[timmy400exfast]

well i rode bikes on the trails before the cop stopped me i wasnt spose to ride there lol so i traded for the ex its just not enough to hang with the 450s like my bikes did so i dont mind mixing gas i dont care if i dont ride for a year and come out one year and just walk all over the 450s

[honda400ex2003]

power why is it funny to compare that chart to yours they should look just about the same unless you did some major mods to it. steve

[powertechn2]

if you look at my sig, you will see what i have done, and at 4k rpm, im making over 10% more power than their highest peak hp.


to me i find that funny, mainly because i see sooo many people that have piped quads that you see that think they are "SO POWERFUL" AND "SCARY FAST".

i find humor in the small things sometimes :D

[timmy400exfast]

i want something with 50 horse lol......................and liquid cooled:D

[powertechn2]

see, thats the predicament im in, i really like the outlaw525s, and the ktm 525xc, but i have more power than the outlaw does stock, so i would have to pipe and jet it just to get close, and from some of the dynocharts i have seen, i would still be at a loss of hp... so i dunno if i should just keep what i have, or buy the ktm or outlaw, just for the technological advancement and better suspension.

[powertechn2]

Originally posted by powertechn2
see, thats the predicament im in, i really like the outlaw525s, and the ktm 525xc, but i have more power than the outlaw does stock, so i would have to pipe and jet it just to get close, and from some of the dynocharts i have seen, i would still be at a loss of hp... so i dunno if i should just keep what i have, or buy the ktm or outlaw, just for the technological advancement and better suspension.

this borrowed from a post in another area on this site...

http://i278.photobucket.com/albums/kk106/powertechn2/special/outlawdyno.jpg

i mean, thats not too impressive to me. i dont know if it was the final, or if it was during tuning, but it says powerbomb header and hmf slipon, and thats just really not that much power imo.

im still looking for better dyno runs, cause i have heard claimed 48hp on the outlaw with ct full system, but not seen actual runs yet.

[katch26]

it never says what kind of K&N and with that small of a main Im assuming drop in lid still in tact etc.......seems awfully low though honestly. The S has a poor intake system though
http://i30.tinypic.com/2lw3lsj.gif

[MyKe2g3]

I suggest you put in a trx 450r engine. Most of the issues you run into with cr500 is that itll vibrate your hands so bad you wont want ride long on it lol. Plus all you have to do is worry about mounts for radiator and engine. It would be a good idea to search the hybrid section of this site so you can see your options. With hybrids builds can go as much money you got and how good of a fabricator you are.

[honda400ex2003]

I guess i would still with the 460 then power cause you will like the 400 better. now i see why it is funny since you are making that much power. Do you have a chart by chance for us to see. I would a crf swap since it is done quite often and some things can be purchased to help with the install such as motor mounts and stuff. that makes fabbing everything yourself easier since you dont have to do so many parts. It would rip too but that 400 out of the bike looks like a nice motor too. I would stay away from the 2 strokes since they are becoming fewer and fewer between and will get harder to get parts for. just my .02 though. steve

[BEAVER.989]

XR600. That's what I'd like to do.

[powertechn2]

Originally posted by katch26
it never says what kind of K&N and with that small of a main Im assuming drop in lid still in tact etc.......seems awfully low though honestly. The S has a poor intake system though
http://i30.tinypic.com/2lw3lsj.gif


what machine is this run, and whats the change between the red and blue?

[powertechn2]

Originally posted by honda400ex2003
I guess i would still with the 460 then power cause you will like the 400 better. now i see why it is funny since you are making that much power. Do you have a chart by chance for us to see. I would a crf swap since it is done quite often and some things can be purchased to help with the install such as motor mounts and stuff. that makes fabbing everything yourself easier since you dont have to do so many parts. It would rip too but that 400 out of the bike looks like a nice motor too. I would stay away from the 2 strokes since they are becoming fewer and fewer between and will get harder to get parts for. just my .02 though. steve


i have a file on here, it was before i did the eichner carb and got it all dialed in, ill transfer it to an img file, and upload it tonight probably, easier then.

im about to buy a 450xc i think, its a swinging deal, and comes with the race ready pkg still, and its cheaper than the outlaw 525s, it is only the 450, but it has ohlins which is wayy better then the front fox's the outlaw has imo. and for 900 bucks i can drop a 540 cylinder on it... hmm.
the dealer says it will should even in stock form be able to beat my built 400.

i may just have to post my quad on craigslist again, but cheaper. anyone wanna 461ex??

[powertechn2]

ok, i lost the one in my puter somewhere among the 100g worth of pictures and files and whatnot, so i took one of the hard copies i had and scanned it, it was crooked, and it was the pre dialing run, i did a total of about 30-35 runs before i got it set that day, this one said 90* air temp, when i was done dialing it was about 1 hour later, and temp was 95* this gives you at least an idea of the broad powerband, ill have to try to find the torque curve also, i found the matching hard copy of that run, but didnt scan it yet.
http://i278.photobucket.com/albums/kk106/powertechn2/special/461exdynopre-dialing.jpg

the engine was still new, hence when the power dropped, the throttle was dropped too, i wasnt concerned about overrev power at the time.

[katch26]

Originally posted by powertechn2
what machine is this run, and whats the change between the red and blue?
This Dyno chart shows the Outlaw 525 stock pipe in BLUE and the CT Sonic pipe kit in RED
from ct's website

[powertechn2]

thats y that looked familiar


and damnit, i just noticed my chart is teh wrong chart, thats speen on the bottom, not rpm... damnit.

that was stock gearing, 10k rpm cut-out, 5th gear run

[timmy400exfast]

how is the relaibility on a trx 250r motor?

[powertechn2]

well, being as there is pretty much NO STOCK 250r left out there, its basically as reliable as the aftermarket parts that its been rebuilt with lol.

you can build a good reliable 250r engine, but you will spend some bucks doing it, member, the last year was 89 i think, so minimum of 20 years old, thats 20 years of someone else taking it apart, rebuilding it, killing it ...


other than that, its 2 stroke reliability and maintenance.

[timmy400exfast]

im seriously thinking about the cr500 alot its in my dreams now lol i dont care much for it vibrating alot but if its to much i can always sell it i just dont wanna be replace any bottom end stuff to often im okay with melted pistons cheap easy fix

[timmy400exfast]

im thinking rubber bushings between the motor mounts and motor and a couple of gussets on the frame gonna have to fabricate my own intake boot do to the place ment of the rear shock and send the crank of to get counter blalnced to take away some of that vibration what do you guys think