stroker crank

[dvx440/440ex]

ok heres the deal was going to go with a falicon stroker but they stopped making them so now im thinking of the hot rods crank i have a 94mm athena big bore and am wondering if that piston will work or do i have to find a custom piston with a different pin height also any one run a hot rods? any problems? thanks

[jefteland]

you will have to run a wiseco stroker piston. i have that set up in mine but i havent rode it yet. i have started it but i am still working on an air box set up for the yfz450 carb. plus there's to much snow right now to ride.

[cataway]

that may not be true . is it the +4 or is it the +5 crank your getting ?

[miles Machine]

yeaa hotrods has changed there stroker cranks to a +4 instead of a +5 specifically so you can use a stock pin location piston

[dvx440/440ex]

not sure yet on stroke how much difference in power would it make also have to check into the whole pump gas thing dont think i want to go to race fuel trail riding would be a pain then and wife wont let me buy another quad for the trails

[jefteland]

when i talked to wiseco they told me all i have to run is premium gas don't need to run rac gas since the compression doesn't change. for the piston the pin is relocated so you don't have to run a spacer for clearance when piston goes to top dead center. if you just run any piston your going to have huge problems.

[jefteland]

did some checking i bored mine out so it's a true 450. but i did find this







Product Description: Stroker DVX 400 Crank 2004-08 DVX400 424CC

Manufacturer: Arctic Cat

Model Crank Fits: DVX 400Fit’s Model Year/s: 2004-08

Hot Rods Part #: 4259

Hot Rods Stroker Crank Stroke Increase: + 4mm

CC Increase: 424 cc

Special Notes: Uses stock piston. Bolt in and go!

i know it says dvx400 but as you all know the ltz and kfx are the same

[miles Machine]

yeaa apparently that jefteland wasnt listening they superseded the old crank +5 to a new one +4 so that you can use any piston you want making it more convenient for ppl to mix and match

[jefteland]

i was listening but i could not remember if i have a +5 or +4 when i ordered the crank i was told i had to run the different piston, so i bored it also. but i wish i would have gotten the +4 then i could have saved $225 from boring. oh will now i am a 450cc.

[cataway]

Originally posted by jefteland
i was listening but i could not remember if i have a +5 or +4 when i ordered the crank i was told i had to run the different piston, so i bored it also. but i wish i would have gotten the +4 then i could have saved $225 from boring. oh will now i am a 450cc. a 450 bore with a +5 stroke would make it a 484 if you dont have the special piston for the stroker then theres a need for a spacer plate between the cylinder and case . i've been told the special pistons dont last long

[jefteland]

i did check with what crank i have it is a +5mm as for the piston it is a 92mm bore which brings it to 499cc.

[cataway]

are you sure about that ?

[cataway]

here try this
http://www.zealautowerks.com/

[jefteland]

i don't know all the measurments that that link is asking but i am going from what wiseco post
Part#: 0910-0813
FITS: 400 DVX, YEAR: 04-08, BORE: 92mm, DISPLACEMENT: 449cc, MAKE: Arctic Cat - Stroker Pistons for Arctic Cat

but i would like to try to figure out that link you posted

thanks cataway

[jefteland]

cataway

do you have any pictures of your air box set up? i was going to use 400ex boot but as you know it's not just a bolt in. but i see your using a ds650 boot. lets see it

[cataway]

try this one it may be easer to work with
http://www.revlimiters.com/html/engine_displacement.html

[cataway]

Originally posted by jefteland
cataway

do you have any pictures of your air box set up? i was going to use 400ex boot but as you know it's not just a bolt in. but i see your using a ds650 boot. lets see it
this is a ds boot next to a trx 04 boot , the ds boot is cut in half to a bout 9''


http://i44.photobucket.com/albums/f9/cataway/carbboot031.jpg

http://i44.photobucket.com/albums/f9/cataway/PictureSL4-11-09017.jpg
http://i44.photobucket.com/albums/f9/cataway/PictureSL4-11-09013.jpg
http://i44.photobucket.com/albums/f9/cataway/PictureSL4-11-09014.jpg

if I'm going on a trail ride then i put the 450 boot on to give some splash guard
http://i44.photobucket.com/albums/f9/cataway/052509brad020.jpg
http://i44.photobucket.com/albums/f9/cataway/052509brad017.jpg
the box is removable from the bracket so i dont have to have a box .
in a week im getting on a dyno and i'm going to try both boots best one wins.

[cataway]

i can only use these boots with the FCR because i have a RAT stack on the carb http://i44.photobucket.com/albums/f9/cataway/9-21-2007LS061.jpg

these boots may work with the BSR carb , but i have never tired that.

[dvx440/440ex]

let us know on the the dyno results currently have a 400ex boot but always willing to change to get more out of the old girl