400ex or some kind of 450?

[mudrunner35]

If i bought a 400ex how much would it cost to keep up with a 450? should i put a 416 a 440 or something in between?because most of my friends ride 450's. would it be reliable or would i be farther ahead to buy a 450? i sat on both and i like the way the ex feels and i don't have to stretch my arms as far to reach the bars so the ex would be a better choice for me

Most 450r's have at least a slip on performance pipe. So you would need to do a bunch of engine work plus full exhaust to be fast as a 450r. It would be cheeper to do a engine swap and build a hybrid than to fully mod the 400ex engine. If you did that it would be faster than all the 450s at a cheeper cost.

[quadracer707]

Save your money & put into a 450. 2 years ago we had a 400ex turned it into a 440 it hauled *****. Put alot of money into suspension new Ohlins all the way around A arms, swingarms it really moved & looked good. Kept up with most "B" riders especially on short tracks, raced against "A" riders not good. HP on the 440 was about 47, you can do that easily on a 450. WE put a TON of money in it. If i could have put that in the 450 I would have been further a head. Make sure you go suspension 1st then motor work. You will be much faster & further ahead this way. I do miss that old 440 though, it fit like a glove.

Ken

wade & coltons dad

[mudrunner35]

how reliable are 450's? i want a quad i can fill up and ride, change the oil thats it. i don't want to do rebuilds or anything like that

[quadracer707]

Originally posted by sandfleas
Most 450r's have at least a slip on performance pipe. So you would need to do a bunch of engine work plus full exhaust to be fast as a 450r. It would be cheeper to do a engine swap and build a hybrid than to fully mod the 400ex engine. If you did that it would be faster than all the 450s at a cheeper cost.





Ya, but you can only run in the open classes, & you will spend alot on mods. They are sweet when done right

[mudrunner35]

i wont be racing, just the odd time messing around at the track but mostly all trails

[Exrider434]

if your a good rider, you could keep up with a built 450 on a stock 400ex :chinese:

Originally posted by Exrider434
if your a good rider, you could keep up with a built 450 on a stock 400ex :chinese:

I dont know about that. Maybe in the d or c class which is pretty much just driving around not racing.

[MOON]

Originally posted by sandfleas
I dont know about that. Maybe in the d or c class which is pretty much just driving around not racing.

I ride my 440 with a 2006 450R w/the HRC kit and Ohlins suspension and can keep up fine. And we ride HARD!:scary:

[quadracer707]

Originally posted by mudrunner35
i wont be racing, just the odd time messing around at the track but mostly all trails

Then a 400 with a kit would be perfect for you. Make sure the head gaskets are tourqued right. You can have a lot of fun with a 400-440. if you need a good engine builder pm me


Ken

[mudrunner35]

Originally posted by quadracer707
Then a 400 with a kit would be perfect for you. Make sure the head gaskets are tourqued right. You can have a lot of fun with a 400-440. if you need a good engine builder pm me


Ken

i'll be doin all the work myself but thats for the advice man:D i'll post some questions when needed:cool:

Originally posted by quadracer707
Then a 400 with a kit would be perfect for you. Make sure the head gaskets are tourqued right. You can have a lot of fun with a 400-440. if you need a good engine builder pm me


Ken

A normal 440 kit isn't going to be fast as a "totaly stock" 450. I seen a 400ex with a race cam, ported, and a 500 kit wit ha full exhaust and was only at 48hp.

cc dont = power. A 426ex is going to be in the low 30s while a 100% stock yz426 has 47hp.