This is what the 450R carb will do for a 440EX-----------
The installation isn't that hard--just use a dremel tool on the air boot entry. I jet mine at 185 main, 4th notch on the needle.
I rode Dumont this last weekend with my Trinity 440EX with aftermarket carburetor(42mm). Here are some results at competition hill. Beat various 450R's that were stock, end cap removed and re-jetted, Big Gun Pipe, and other after-market exhausts. Some 450R's beat me, but less than half. There was 1-450R that was beating everyone. Beat various piped Raptors, some Predators, however I did get beat by some of those with modifications unknown. I stayed close, 2-3 bike lengths with DS650's. I got beat by 1 z-400 (first time ever) and beat several other z-400's. I beat like 4 YFZ's stock and piped, but the majority of the machines destroyed me. Beat some Banshees. There were a ton of 450R's there which surprised me. One of the funniest things on the week-end was when a guy on a piped 450R called me out----but he would only race me if we started half-way up the hill, past the whoops. A hill without whoops, what a joke!! Needless to say I beat him, when I started at the base of the hill and he started half-way up the hill. I was thinking about purchasing a 450R, but many seemed to have difficulty navigating the whoops and their power output was not much more than the 440EX. I ride mostly track and some dunes. Any input?

 

the average rider sucks through the whoops. i suck at launching and shifting to 4th in the whoops and have lost plenty of races due to it.

 

How much does a 45or carb cost? Did you lose the airbox?

 

Service Honda sells the carb for $165. I have my airbox moved forward an inch, a simple modification.

 

that is a nice mod idea

 

That carb really rips on the Predator. I have one and love it.....[img]i/expressions/face-icon-small-smile.gif[/img]

 

Wow, great post.

I have a question...not sure if you know the answer. A lot of stock EX carbs leak gas like a **** when they are in a wheelie (very high, slow speed wheelies are when you see it the most). Does the 450r carb leak at all? I suppose you won't know the answer unless you were actually watching for it, but I figured I'd ask anyway.

Thanks again for the great post.

-Josh

 

i really noticed that also(gas problems) can the 450r carb go on just a piped 400ex, i would assume it would benefit jetted correctly.

v581

 

I'm pretty sure all carbs do that, they just leak out of the overflow, at least every ATV I have ever seen do a wheelie leaks gas, which is why my cousin seems to need to refill on gas a lot more than the rest of us, he can out wheelie me any day of the week, but keep 4 wheels on the ground, or jumping, and I got him.

 

how much hp increase do u get form the 450r carb? check my mods below, tell me what u think id gain