416, 426, 440?????

[ohsobad_chevy]

Allright fellas, I have a 2004 400EX with nothing done to engine. I want to bore it to a 416, 426, or a 440. I am not for sure which one yet, but thats why im posting here, I prefer not to go to a 440, I dont want to go that far. I was wondering the difference in the 416 to the 426. Am i better off going to the 426 and putting a high compression piston and a stage 1 hotcams, or should i stick with the 416 and hotcams stage 1? I want to know all the ups and downs of going to the 416 or 426. I also need to know what the difference in the stage 1 and the stage 2 hotcams is. I do mostly trail riding and dunes. Thanks for all the input.

Thanks,

[rooster300ex]

My opinion. For the dunes 440. you want as much power as you can get. A 426ex would be a great all around motor, and i would port&flow the engine too. I don't know much about the 400ex hot cams.

[stc416rider]

use this thing

[ohsobad_chevy]

Originally posted by stc416rider
use this thing

Why did you even put in the effort. I know how to search, that wasnt my question.
Anyone else feel free to add useless @#$$ as well.

[underpowered]

Originally posted by ohsobad_chevy
Why did you even put in the effort. I know how to search, that wasnt my question.
Anyone else feel free to add useless @#$$ as well.

seriously, search the 400ex forum. this topic has been beat to death, brought back just to be beat back to death. All kinda of good info can be found. Yo uwill get a different answer from most people, all depends on what they have, have had, or have ridden on where they get their info. som say 440 is the only way to go, others willsay 426, and the rest will say 416. i have ridden them all and will say it depends on how they are built. my well built 426 will walk all over a poorly built 440. I prefer teh 426 out of the ones i have ridden, but thats just me. i would not go 440 either, stay smaller.

[400 SS EX]

I'll try to help you out here because I know the search on this site is hard to get specific on. Ok for motors The 416 when you bore it out uses the stock sleeve still and you can gain some power from it ( this woouldn't be my choice ) a 426 Is max bore on a stock 400ex sleeve so you can do max bore and create excessive heat because of this or install a new sleeve ( which is basically a 440 sleeve except not bored out as wide) the upside to putting in a new sleeve is if you blow it up later or want to get a bit more power you just bore the sleeve a little more and bump it up to a 440. ( this is the way to go in my opinion ) With the 440 you gain the most power, not too much more than the 426I couldn't give you any numbers, and if you mess up the 440 then you have to press out the old sleeve and have a new one installed, so more money. Now with compression anything below 12 or above 10 is good if you go higher than 12:1 you have to buy heavy duty head studs. With cams its a toss up with the kinda riding you do. For trails I would say the stage 1, its more a low end and mid good for lots of power without shifting too much. The stage 2 is good for dunes, its a high RPM cam that'll give you top and mid. So that is solely up to you. I hope this helps if anyone sees I left something out finish it off for me.

[sixer3]

426

440 needs too much money to keep reliable on an air-cooled motor

416 not much of a jump from stock athough nice to have

since the 426 cost the same price... 426 has my vote

i prefer the resleeved 426 as well

[440_Turtle]

can someone say STROKER!!! I love mine and it has great low end torque with great tope end also. Im running a Sparks x-4 cam and this thing is an animal. Its like nothign ive ever ridden before.

[400 SS EX]

Originally posted by 440_Turtle
can someone say STROKER!!! I love mine and it has great low end torque with great tope end also. Im running a Sparks x-4 cam and this thing is an animal. Its like nothign ive ever ridden before.

I thought a stroker kit was a DECENT amount ore money for a 400ex like 200-300 more expensive for a kit, plus I dunno about you ohsobadchevy but I sure as hail can't rebuild a bottom end and if you can good for you. Installing a top end kit ( big bore basically ) is just a matter of dissambly, machine shop , put in piston , cams , chain and other odds and ends. Vs. splitting open the crankcase and whatever else is involved with a stroker. But 440_ turtle I must say they put out some pretty impressive power. Ohsobad chevy if you need alot more power or something 450s are for sale everywhere. ( at least here in the midwest)

[cals400ex]

get a 416 and a stage 2 hotcam (new stage 2).

[1fst400]

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=4642216808&ru=http%3A%2F%2Fmotors.search.ebay.%20com%3A80%2F% 3Ffrom%3DR40%26satitle%3D4642216808%26<br%20/>fvi%3D1


Buy that motor. Im selling it out of my 400. I know a kid that has a 440 with the works done to it. In a flat out drag he pulls a quad length or 2. But out of the corners I lay out the smack doun. 416 the way to go, will run under water compared to them high maitnence 440 kits.

[440_Turtle]

Originally posted by 400 SS EX
I thought a stroker kit was a DECENT amount ore money for a 400ex like 200-300 more expensive for a kit, plus I dunno about you ohsobadchevy but I sure as hail can't rebuild a bottom end and if you can good for you. Installing a top end kit ( big bore basically ) is just a matter of dissambly, machine shop , put in piston , cams , chain and other odds and ends. Vs. splitting open the crankcase and whatever else is involved with a stroker. But 440_ turtle I must say they put out some pretty impressive power. Ohsobad chevy if you need alot more power or something 450s are for sale everywhere. ( at least here in the midwest)


Yes you are right you will have several hundred more in a stroker than just a big bore kit but why not if youve got the engine torn down to that point. I feel that the power justifys it. If you can tear it down to that point and dont feel comfortable splitting thte cases take it to your mechanic at that point and then reassemble the top end once he replace the crank and bearings.

[ohsobad_chevy]

Originally posted by 440_Turtle
Yes you are right you will have several hundred more in a stroker than just a big bore kit but why not if youve got the engine torn down to that point. I feel that the power justifys it. If you can tear it down to that point and dont feel comfortable splitting thte cases take it to your mechanic at that point and then reassemble the top end once he replace the crank and bearings.

How much does it cost to make it a stroker. Basically, how much for the crank/bearings/etc...?