aftermarket head

[timmy400exfast]

i need a new head for my wheeler i was just wondering if anyone makes a aftermarket head for my 400 thanks

[Wheelie]

Nope.

[Honda#4]

Duncan Racing makes the PC4000 kit but its quite expensive.

[Wheelie]

That's the cylinder Duncan offers, not the cylinder head.

[timmy400exfast]

yea i think ill just get one ported and polished

[250x_kyle]

nobody makes aftermarket heads because of how complex they are and how they must be spot on to function and seat correctly. get a used head off ebay throw some black diamonds in it cam it and go.

[timmy400exfast]

well i was gonna get a hotcam stage one and maybe get a +4 crank and a pipe and a bigger bore just one of my valves are bent so im just gonna get a new head there pretty cheap on ebay this is all gonna be done in the winter

[honda400ex2003]

that would be a nice set up. i would love to put in a stroker just to see how it really is. I would like to do a 416 with a stroker crank and see what happens. i think it would be crazy fast but i am not sure i guess. steve

[timmy400exfast]

if you get a smaller stroker kit do you still need to get a special stroker piston? does anybody know

[Wheelie]

Originally posted by honda400ex2003
that would be a nice set up. i would love to put in a stroker just to see how it really is. I would like to do a 416 with a stroker crank and see what happens. i think it would be crazy fast but i am not sure i guess. steve

That's what my setup is. It runs hard and has been very reliable. I've spend a fair amount of seat time on a piped/filtered/13 tooth 05'R, and my EX has more power/pulls harder in every gear. It's nearly dead even with my buddies piped/cammed/filter/12 tooth 07ER.

The 440 stroker is a killer setup.

[honda400ex2003]

i think you have to since the pin height of the piston changes along with the rod to make the full 4 mil. this may only be on the hot rods though. i know that you have to for sure with that. i dont know about the camillo (sp?) i think that is what it is. i think you can run a normal piston cause that one uses a full4 mil rod. dont quote me on it though. lol. steve

[timmy400exfast]

dude im hereing so many good things about strokers im so siked to put a crank in mine

[Wheelie]

Originally posted by timmy400exfast
if you get a smaller stroker kit do you still need to get a special stroker piston? does anybody know

Short answer--yes.

With Hotrods setup, they relocate the pin higher in the piston.

Powroll uses a 2mm shorter rod and retains the OE pin location, however, slight machining is required on the piston skirts to clear the crank throws.

[timmy400exfast]

with the hot rods 4 mil you have to run a 87mm big bore but that would make it a 460 i dont know if i want one that big i wanna keep up with the 450s and raptors i dont wanna beat them just keep up

[honda400ex2003]

i know they sound like a blast to ride. is a lightened flywheel a good thing for strokers or is it a heavier one that would be better. i guess the heavier the more low end hit but with the stroker they have a ton of torque so the lightened flywheel would benefit the top end. I read something a while ago about it but i cant remember exactly off hand. do you know? steve

[honda400ex2003]

with a 440 and a stroker it makes a 460 doesnt it? that is a 89mm piston. as far as i am concerned whoop em up man. lol it would be fun to have a kickin sleeper to pull up on and have them in awe when you blow them away. lol lol steve

[Wheelie]

Stock--85mm bore by 70mm stroke--397ccs

Powroll--87mm bore by 74mm stroke--440ccs

Hotrods--89mm bore by 74mm stroke--460ccs

[timmy400exfast]

ive always heard good things like they are way faster than big bores does anyone have a vid of one so i can see the difference

[timmy400exfast]

so hot rods doesnt make a 440 crank

[Wheelie]

Originally posted by honda400ex2003
i know they sound like a blast to ride. is a lightened flywheel a good thing for strokers or is it a heavier one that would be better. i guess the heavier the more low end hit but with the stroker they have a ton of torque so the lightened flywheel would benefit the top end. I read something a while ago about it but i cant remember exactly off hand. do you know? steve

My revs quick with the stock flywheel, much better now with the +4 key installed.

I intend on having the flywheel shaved soon. I'm curious to see the results of it.

[honda400ex2003]

no the 440 is not with just a crank for any of them. steve

[honda400ex2003]

thanks for the info wheelie let me know what happens when you do it. steve

[timmy400exfast]

i want a sleeper so much well cause evryone in my town with a raptor think there **** dont stink cause they can go fast in a straight line and they got the biggest bore:eek:

[honda400ex2003]

all the guys around here have 450s and raptors. they think they are gods give to off road with them. it is funny. I want to race a couple to see what the 416 has i doubt i will win but maybe it will be close. steve

[timmy400exfast]

i can get off the line better than most the raptors because no one nows how to take off here but then there top end eats me alive

[Wheelie]

Originally posted by honda400ex2003
all the guys around here have 450s and raptors. they think they are gods give to off road with them. it is funny. I want to race a couple to see what the 416 has i doubt i will win but maybe it will be close. steve

I've had many comments, compliments and questions at the dunes. It's priceless to race the 450 crowd and see their faces when I beat em'.

[honda400ex2003]

yeah that is the problem. lol steve

[timmy400exfast]

and no one will show up at the track one time some one i knew came there with i raptor 350 and he was talking honda sucks yamaha anyday and beat him by half a track he got all red faced all i had to say was what was that again

[Snipe]

You can buy heads on ebay for stock bore all the way up to the 440 there brand spankin new heads as a whole kit.

I think motosport.com also sells the kits as well. Ebay around $400 to $500 motosport around $700

[killer400ex]

kinda wish i had gone with a stroker, i love what i have now but i mean its all about braggin rights around here, and i can keep up and usally win with what i have now, but alot of ppl run 450s around here too, i think im like one of 2 ppl in the area with a 400 lol, but yeah i would have like to go with a stroker but it was alot more complicated and it was stupid expensive, i probly could have bought a new motor for the price i would have payed to do it, and i think if you stroke it you need to have the stock flywheel because the compression diffrences, all in all i think you need more weight to turn it over, you could lighten it up but it would probly stall at low rpm

[timmy400exfast]

yea i priced it out for a 460 stroker its like 700 spendy looks like ill be saving my coins and i am running the stock flywheel i want to find something cheaper but idk the only place i looked wa ebay

[ngates788]

strokers are very nice i had the 89mm with the +4 hot rod crank and let me tell you it is ballsy. all said and done mine was close to 2g having it professionaly done up port and polished head cam.. the works. but you have to make sure your jetting is set up right.. thats what got me apartently i was running lean and blew mine up. good luck with what ever you choose but you will definately not be disappointed with a stroker

[timmy400exfast]

how did you do compared to a 450

[timmy400exfast]

my dad is a auto tech tech and i can do most of the stuff also so we dont have to pay for the labor thank god its through the roof in price lol

[ngates788]

i couldnt even give you a fair comparison the only 450's ive ran with were also strokers pushin over 500cc needless to say i still got my ***** handed to me but the race i blew it up in i was leadin an outlaw and a built raptor by a few quad lengths

[timmy400exfast]

well most the 450 ands rap's here are stock besides a slip on and there top end kills me

[ngates788]

well with the added power of the stroker you could always do a quick sprocket swap and gain some more top end .. then they wont stand a chance!

[timmy400exfast]

well i can keep up till they hit like 4th then im done

[ngates788]

well trail riding i usually ran a 36t in the rear .. i still had enough torque to pull the fronts up in 4th est mph 85ish or so with 20in rears

[timmy400exfast]

wow lol

[RIDEREDson]

Originally posted by Snipe
You can buy heads on ebay for stock bore all the way up to the 440 there brand spankin new heads as a whole kit.

I think motosport.com also sells the kits as well. Ebay around $400 to $500 motosport around $700

I see 440 bored heads but no 416's...

[timmy400exfast]

i just went on hot rods webs site and this is what they said about the piston it was on the faq


Do I have to use your special piston?
No, but we highly recommend using our piston because of some special design features which makes our piston more convenient. We have moved the wristpin location up 2mm so that a special base spacer and new cam chain is not required. You can use your stock cam chain.


i will probabaly get one to be safe if they move the wrist pin location up 2mm how would you use your stock piston? it just doesnt make sense to me

[honda400ex2003]

i guess you would just lose the 2 mm in the stroke i guess. i dont understand why you would need a new cam chain at all though. that is weird. i would get one just to be safe i guess. steve

[timmy400exfast]

man i got like a grand lined up for parts this winter for a build and next winter i think im gonna get some suspension well better start saving up all and all ill have a good quad in the spring

[Wheelie]

Originally posted by timmy400exfast
i just went on hot rods webs site and this is what they said about the piston it was on the faq


Do I have to use your special piston?
No, but we highly recommend using our piston because of some special design features which makes our piston more convenient. We have moved the wristpin location up 2mm so that a special base spacer and new cam chain is not required. You can use your stock cam chain.


i will probabaly get one to be safe if they move the wrist pin location up 2mm how would you use your stock piston? it just doesnt make sense to me

The stock piston wouldn't work without a cylinder spacer--which would in turn require a new cam chain.

[Wheelie]

Originally posted by honda400ex2003
i guess you would just lose the 2 mm in the stroke i guess. i dont understand why you would need a new cam chain at all though. that is weird. i would get one just to be safe i guess. steve

Rod length and piston pin location have NO affect on the engines stroke.

The new cam chain would be required if a piston with a stock pin location was used--which would require a cylinder spacer.

[timmy400exfast]

oh i get it now the reason you would need a new cam chain is because it would be to tight and not long enough i get it now

[honda400ex2003]

yeah me too thanks for clearing it up wheelie. steve

[powertechn2]

i have a 461ex... i guess thats what it equates out to with an 89mm x the +4 stroke...

it hauls. has tons of torque.

the only issue ever is clutch longevity :D


i can hang with 450s,some that are done up, the only other issue is that the chassis wasnt made to have soo much power, and the tires i run dont hook for schit.

i had the head all done up too, and also went with an eichner 440 carb that had to me modded slightly to feed enough fuel as well, then had to add discs to the E series pro meg exhaust system, cause otherwise what they give you outta the box is too choked up.


any ?'s, i do know a lil bit about it ;)

i also went with the 12.5-1 comp ratio, but used a custom piston...

[timmy400exfast]

ya how much did it cost did you do the work yourself?

[powertechn2]

total$ was alot... i planned on doing myself, but ended up letting a custom hi-po shop by me do it, of course, they cost too much,

total close to 2500k.( maybe more, maybe less, i forget, some of the parts i got like the custom piston, other parts they got) but it makes a schi-ton of power and torque.

i want to buy a new outlaw, and im gonna have to do a bit to get the power back that im losing in the trade up.


it all started out from me deciding to do a 416 kit lol. figured while i was there, i might as well do this, and then that and then this and that... and before ya know it it was a 461. i almost did the 500 kit, but figured that was really overkill.

the only bad thing is that i still have the stock parts, they were all good, like 15-20 hours max lol. i just wanted more power.

now maybe like 40hrs total max, and im selling it.

[timmy400exfast]

lol thats alot of money maybe i wanna go a little smaller than a 460 lol ive heard the 426 and 440 are wicked fast also

[MyKe2g3]

I remember when i first came over to this site there were alot of guys with 500 kits pushing 50 plus hp. I would love to have that power on hand. Lil 400ex overpowering 450s and banshees lol.

[powertechn2]

well, total, with the exhaust and ignition, carb... everything, it was like 37-3800 total, but, if your not doing the work yourself, the labor cost is the same.

then, it also includes EVERYTHING i have done, like the larger b-d valves, the porting and polishing, shortened guides installed, flo-bench testing... if you do a bore and wanna do it right, you have to do a larger stud kit, which i did, and then different valve springs, and all the cryo'ing i had done... and heat coating and anti friction coating, carb, exhaust, ignition... had to replace oil tank... and i sorta went nuts

im @ 47hp, but can still make more...

[powertechn2]

i really shouldn't sell it, im prob gonna kick my own *** later.


esp when im gonna let it go for $2500, just to get a quad that i will have to do some re-warming to just to make the same power.

[timmy400exfast]

2500!!!!!!!!!!!!!!!!!!!!!!!:eek: someone is gonna get a steall of a seal i got mine for 2200

[powertechn2]

yep. someone is gonna get a steal, its clean too... i haven't tried posting a pic here yet, lemme try....


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

i had some engineer that was looking for a stock one say how much he liked it, and that it was wayy cleaner than the stock ones he had been looking at for about the same price, i thought he was a sure sale, then next day he called me up, said he thinks its too much power for riding with the wife and son, but then said he is going to buy a stock one, but add a k&n, and an exhaust and jet it... but THATS ALREADY ALL DONE ON MINE... and he is gonna spend more money to do that, and mine is still nicer than the ones he looked at... go figure lol


now i have a 14 yr old kid (according to his emails) that wants to buy it and keeps asking me to go less than 2500... asked if i wanted to tradefor a lord of the rings sword and money.... lol its too much power for most 14yr olds imo.


and the bike in the background was my wr400... it only had 440 miles on it and i sold it for $2000 last week lol. it was uber clean too. i really dont ride that much, just when i do, i cant stand being on something slow.