I am looking at a 00 400ex and i was just wondering some things like what is the top speed, and will a BIG GUN exhaust make it performe better in any way???

 

The 400EX is absolutely awesome machine. Top-end it good, but the low-end and mid-range power are even better. The 400EX has great torque for ripping out of corners and rocketing down the straight-away. It is the ultimate trail machine. The suspension soaks up all bumps and handling is very precise and predictable. Buy one and you will not be dissapointed.

I have heard nothing but good things about Big Gunn exhaust. My machine ('99) is stock and I am fine with it.

 

Stock mph around 64
Hollshot XCT tires,14 tooth front sproket,Around 70 mph.
Above with LRD pipe and Dyno jet jet kit needle on third notch main jet 165,holes in the air box lid, stock filter.Haven't topped it out yet.Don't know if I want to go that fast.

[This message has been edited by trx430ex (edited 10-14-1999).]

 

Mine has FMF Power core IV, K&N Filter and jet kit and bigger main needle, one tooth down on back and always very high grade gasoline and i topped out at 74mph on blacktop. I dont think i ever want to go that fast again, you wanna talk adrenaline rush, WOW!


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~~Mike

'99 400EX, FMFpower core IV, WB Triple rate shox, AC Nerfs, K&N Power kit, Renthal Bars, etc...

 

You won't be dissapointed with the EX. Even in it's stock form. I have ridden one with an FMF PowerCore, and one with a White Bros.

I really like the stock performance and the sound. The other pipes are really loud compared to stock.

I haven't felt the need to change mine from stock yet!

RM

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99 400EX 95 Scrambler 400 85 LT250R

 

The Big Gun is the best sounding exhaust but it may ad a little in the mid and upper range it definately robbs some of the low end torque. Nice system though. Duncan Racing swears that the new Yoshimura pipe is the ultimate pipe for the 400ex.

 

Like rennym, I haven't felt the need to increase performance. Stock is awesome!

 

Thanx alot guys, i rode my friend's 300ex the other day and i luved it but i want something that is bigger, if i get the 400ex then i am going to leave it stock for a while till i get used to it, i just got a dirt wheels on that new yoshimura pipe and it looked good and got good reviews but how much will it cost??

 

The Yoshimura pipe comes in a couple options. The full titanium pipe is around $570, but there are cheaper versions that start at around $400. I just got the DMC Dual system and it kicks ***. I raced my friend with a Big Gun and I beat him. You'll have fun no matter what u choose..