How Fast Does a Modified TRX440 go

[red_rider_069]

i dont mean how fast it goes because the gearing changes but how fast do 400ex accelerate when they modified with a 440 big bore and after market exhaust... intake, rev box, cams?

[Ruby Soho]

they have monster bottom end power, i can tell you that much:p

[red_rider_069]

ok heres my set up i got a trx400ex which i have been moding out i got a big gun pipe evo, k&n g4 rev box and im getting a 440 big bore.. but i have no idea how much more acceleration it will have.. im also planning on getting a 440 eldel brock doug eicher series carb.. do u think it will run ALOT better? i have never ridden or seen a bored out 400ex

you'll be happy

I rode a 440 without knowing it at the time and wow, power through every gear. The quad felt like a light switch instant power and every gear it keeps pulling so strong.

[drew416ex]

You wont tell a big difference just boring it. I cam will be needed to make everything work nicely. Compression is also a factor in how much torque or take off power you have.

[drew416ex]

Not trying to talk you out of a 440, but a well built 416 is also pretty fast. Plus you dont have to get it resleeved or get the case bored.

yeah my friends 440 lasted a year then the engien you saw it starting to quit so he sold it. 440s are really that realiable.

[michaelj]

I got a 465 kit done from Trinity and it absolutely rips....neck and neck with the 660 raptor drag race.

[CSR400EX]

Originally posted by drew416ex
Not trying to talk you out of a 440, but a well built 416 is also pretty fast. Plus you dont have to get it resleeved or get the case bored.

you dont have to get the case bored with the wiseco 440 kit. i ran one in my old 400 and it went right in

[drew416ex]

Thats true, I was just automatically thinking of the kits with the larger sleeve just because they are supposed to be more reliable. Im not sure, thats just what I hear.

[jesseweaver]

my cousin had a 440 in his, and a sparks pipe, and a few other mods, but im not exactly sure what, and my 416, the mods are in my sig, could easily hang with it.

[rooster_20]

I just had my motor redone and just went up to a 406 and I can tell a pretty significant difference in it. I dont know if it was because I had some compression loss before the bore or what, but there is a big difference thru 2nd and 3rd. 440 has to be wicked fast. And to add it really matters who does your work on your motor. The first people I took it to wanted $800 in just parts so I took it to a different shop where I knew it would be done right and for cheaper. Got the whole job dont for almost $700 so it really matters who you trust. jmo good luck.

[gcart2]

Originally posted by rooster_20
I just had my motor redone and just went up to a 406 and I can tell a pretty significant difference in it. I dont know if it was because I had some compression loss before the bore or what but there is a big difference thru 2nd and 3rd. 440 has to be wicked fast. And to add it really matters who does your work on your motor. I 600 so it really matters who you trust. jmo good luck.

hes right.. it all depends on who builds it.. or better yet, how its built. a stock bore motor will beat a 440 all day long.... if its built right.