I have run aaen products and they do a good job.On your 400 (I had an older 425) I got a good gain from changing the primary spring to a Polaris white and an Aaen blue secondary spring.

 

Tanks for the reply Ftwflh I was just woundering about the stuff from aaenperformance they had a kit it did;nt really say what it consited of so i called the outherday to see what came with it the lady I spoke to was very nice she told me it came with a spring for the primary and diffrant weights and for the secondary a diffrant helix, and spring I was wanting to know more but thhe guy I neeed to talke to she said was busy but if I called back someother time he could explain it to me better. Oh ya another thing was I kinda liked the price to about 95$ shiped.

 

i just went to the aaen we site and found a pipe for my 400 sportsman and would like to get more info they also have a kit for a trailblazer to up it to 38hp(wow) but i could not get a phone #### ... iam realy interested does anybody know how to get ahold of them,like i said it was not on the web page or i just could not find it .. anybody

 

I called the otherday but the guy I needed to talke to was busy just have'nt called back phone no# 1-262-552-8981 or 1-262-552-9410. I was going to ask about their power shift kits they had on the website if you find anything out about their kits or stuff let me know ok.

 

i will call tomorow if i rember ... i want to check outh e the pipe, and clutch kit.. i still think epi is way to go i am just waiting on a few more leads... thanks for the#####

 

guys i believe aaen is blowing smoke up your as.. ask him if it doesn't work can you get your money back,heelclicker will,wayout,out................................... ..

 

thats funny i asked heelclicker if i could get my monney back if i was not satisfied.. he said no.. but epi also said we will not return a installed item...i believe a epi will better benifit a 400 single cyl eng than any other kit... just my 2 cents .. i also believe a h/c will out performe on the bigger twins.. i feel that a 400 needs more tuneing to get up to par, jet kit, k&n ,exaust,over rev cdi box, even a ported head if i get that ambitious.. its there it just needs to be tuned and tweaked.. i think the key to a 400 is rpms, all though i could just be a dummy.. POLARIS THE WAY OUT!!!!

 

I can tell you from experiance that the 400aka 425 just needs some minor clutch work(no need for a kit) a K&N filter and a good flowing exhaust and it will run with any of them.
I personally dont care for EPI kits.They have a few good springs to choose from.
HeelClicker is a very god set up but takes time to dial in.
Aaens kits are ok if you NEED the helex and springs as is HPD.Hotseat is good too but I dont like the way they set up the weights and the helex they recomend.
No complaints on Dalton Industreis other than they are a bit pricey.
Actually the BEST thing anyone can do with a non EFI is put in a TEAM roller secondary set up from HPD for their machine and go with a spring and weight change to get the wanted power range.

 

i am wondering why the aaen kit is only $99.00 (just checked) and the epi is 179.00 , they change the same parts ,weights springs and helix ...

 

wayout,here,you may be right onesavage, keep in mind,i bought mine in 2004,things could of changed since then,sounds like they have,, i bought mine just for pulling power,also so i wouldn't have to use low gear as much,,if i wanted more power, i would have bought a bigger atv.....wayout,out..........................