So I raced my friends bone stock 09 kfx 450 and was surpirsed, it was close but i beat him. We raced about 6 times with the same result. It was really close but when i hit 4th i started to inch away then when he topped in fifth i was still going. I have really bald tires, but with new i think the xx would take it top to bottom. After we switched with me being 190lbs and him being 130lbs his 450 wouldnt touch the xx at all. He was amazed at how much power it had. His would were "Damn dude that things got some nuts" Haha No videos to back it up but maybe next time. What has everyone had for run ins with 450's? Next on my list is my other friends 04 trx 450 with full fmf exhuast and jets.

ive had a couple of kfx's fall victim to the mighty XX. the quad that has suprised me the most was the Suzuki's those things are built well.

I alwasy thought the kfx and the ltz were the exact same, did that change with the 450?

i dont know much about the difference but it seems like the suzuki ltr has a bit more power than the kfx to me. but i still owned them both

I beat a 2004 yfz450 with full gytr exhaust velocity filter and re jetted when I was totally stock.

I alwasy thought the kfx and the ltz were the exact same, did that change with the 450?
yes they are quite different with the 450

I smoked a canam 450 and i raced a yfz 450. me and the yfz went back and forth but it was pretty even, which, the yfz had a lot more mods than me with my slip on. lol

So I raced my friends bone stock 09 kfx 450 and was surpirsed, it was close but i beat him.

my other friends 04 trx 450 with full fmf exhuast and jets.
first sweet deal the xx does have a lot
next good luck trx 450 are fast it is afterall honda race bike i havnt been able to beat my buddys but the have hrc kits and a built engine in the other. but i keep up just fine.

I smoked a canam 450 and i raced a yfz 450. me and the yfz went back and forth but it was pretty even, which, the yfz had a lot more mods than me with my slip on. lol

nice

I just got my 08 700xx in june of 2010 as a left over. Its still stock and i finally got to race against a couple 450's over the weenkend they all had aftermarket exhausts and not sure if anything else, But i raced a kfx 450 and I beat him by a 4wheeler length away if not 1 1/2. Then i raced the trx450 was side by side couldnt tell who won and then i raced a yfz 450 and it beat me but i think i had a bad start. Everyone was impressed with it. This is my first quad

I alwasy thought the kfx and the ltz were the exact same, did that change with the 450?

the KFX 400 was a LTZ 400 with Kawasaki labels. the 450's are completly different animals.

ive beaten a bunch of ltzr 450s n kfx 450s.. only one to give me a run was the yzf but i also got bald ass tires... i have a few vides on you tube.. search eclipsegs0 n u will see all of them i jus cant post them here

eclipsegs0 maybe im stupid but i looked at your youtube videos i dont see you racing anything but a dirt bike

yea thats the only race i have as of now but i got a few more to add.. its juss us messin around

If you are racing a 08-09 kfx450 they only weigh about 325# compaired to the 700s 500 + lbs

what, the kfx weighs 394.7 curb http://www.kawasaki.com/products/product-specifications.aspx?id=331

so its only 110 pound difference compared to 180 difference like 700xxx said

what, the kfx weighs 394.7 curb http://www.kawasaki.com/products/product-specifications.aspx?id=331

so its only 110 pound difference compared to 180 difference like 700xxx said


yup you are right. for some reason I thought they where less. (I own one ) but unloading the bikes out of my pick up the kfx feels like about half of my 700. still 110 lbs is stil a lot.

the kfx is 364 lbs dry weight.

so far ive easily kept up with a trx450 and kfx450..im 240 pounds..the guys i was racing was 180 and 150 pounds..the trx is mine my cousin was on it..full exhaust and air filter..the kfx has a slip on..progammer and air filter..the guy races it and in a drag race up a hill we were side by side..my xx is totaly stock..

beat a 500 polaris predator that has a slip on and big bored up to 560cc. he thinks he is king chit and we lined up the bone stock 700xx in the field and beat him 3 out of 4. the one loss was just do to a bad launch on wet grass. really pissed him off. we haven't talked since.

beat a 500 polaris predator that has a slip on and big bored up to 560cc. he thinks he is king chit and we lined up the bone stock 700xx in the field and beat him 3 out of 4. the one loss was just do to a bad launch on wet grass. really pissed him off. we haven't talked since.
I hate people like that. Nice job! :xx:

I run into alot of people that rag on the 700XXs, but not a single one ever stepped up and wanted to race, I'm still waiting to race one.


Seems that 70% of the people that have them bought a extended attitude with the quad.

Seems that 70% of the people that have them bought a extended attitude with the quad.

:funny:

the 700xx is fast. I think after I get my big 3 on this week it will be as fast in a straight line as my trx450r. I love the XX for trails, but my 450 is king on the track.

My friends raptor 700 always want to drag against my 450, but I won't do it unless they race me 3 laps around the track too;)

I had my first 450 run in this weekend at Black River Falls, WI. We raced till fourth gear was pretty much maxed out. I have video proof of the kill in the video section. :-)

yep yep....450s aren't great drag quads.....more potential with a big bore. Or a 350cc twin and a really long swinger;)

yep yep....450s aren't great drag quads.....more potential with a big bore. Or a 350cc twin and a really long swinger;)

Not sure what ya mean? The xx is probably the worst for drag racing since you can't really extend it without big bucks and custom work. The 450's are balls fast, had I made one mistake my friend have beat me. We are bot big 3 bikes and his shit is fast!

I'm just saying I don't get bothered when a raptor or any quad beats me when I'm on my 450 racing a straight 300' stretch by a quad length. B/c I'll smoke em on the track;)

But good win......the xx is fast.

[QUOTE=yep yep....450s aren't great drag quads.....more potential with a big bore. QUOTE]


I disagree...I have seen some pretty fast TRX450's run in the high 4's in 300 ft.:hey:

The 450s are monsters when built right, the power to weight ratio is ridiculous on them.

[QUOTE=yep yep....450s aren't great drag quads.....more potential with a big bore. QUOTE]


I disagree...I have seen some pretty fast TRX450's run in the high 4's in 300 ft.:hey:


Well since I have been riding for 20 years and I have owned a 450 since 2004 I don't know too much;)

Btw my 450 has around 55 hp, full exhaust HRC kit including cam, with a venom 480 big bore, p/p +1 valves, FCR carb and 100 octane fuel. When I run against modded banshees I don't win that often. Some big bore raptors beat me too. I think I would be faster if I went back to 20s in the rear instead of 18s I run on the track.

All I am saying is when you get into serious dragging the 2 strokes and some big bores ultimately have an advantage IMHO.

Well I was not knocking you.....when you race against a modded banshee, depending on how modded no 4 stroke is going to take it, but yea the 18's are killing you.

The 450 I raced had 20" kutters. They were brand new and that thing was fast. He said if he ports his carb he'll pick up a few horse. I think at that point he'll be working me over!

I raced a ltr 450 weekend before last. It was a 3mod bike on 18" tires. I beat him but not by much. I got the EHS big 4! I launched in 2nd with the 14tooth and he was right beside me til I hit 3rd. Then I slowly started to pull away from him.

Since this is about the KFX, figured I'd chime in. The KFX is very bottled up when stock. And until the entire intake and tube is replaced, other mods do very little. I've also owned an LTR (Suzuki) and TRX (Honda) 450s. The KFX is definitely faster than the Honda with the same mods. I didn't do enough to compare the LTR, but it's nearly free to add 7hp (remove airbox lid, baffle, Cherry Bomb). The KFX also has the slowest topspeed stock, so the XX definitely should walk from it up top. After the 'big 3' and cams, I went up a tooth on front sprocket because 1st gear became useless, now it's quite a bit faster up top. I did the opposite, dropped a tooth, on the other two 450s.

How the the XX's compare to the Raptor 700r's? Three of my buddy's have them and the KFX is quicker, maybe faster up top re-geared, but I haven't tried it, I don't care for riding pavement. I'm here because I think I may replace the g/f's 250ex with a 700xx and have always been interested in them!

The XX and the raptor are neck and neck up to three mod from there the raptor will dominate, and I used to eat up KFX's when I was stock, in my experience the KFX is the slowest of all the 450's.

The XX doesn't have the aftermarket support to keep up with the Raptor. I think they are both very fast bikes in there own respect. Drag racing is not where the XX really shine's. It is a very good and fast bike though. Eat's up rough terrain like it is nothin.

The XX and the raptor are neck and neck up to three mod from there the raptor will dominate, and I used to eat up KFX's when I was stock, in my experience the KFX is the slowest of all the 450's.

If by slowest you mean drag racing at top speed, you're correct. The KFX has a close ratio gearbox and with the 14T front sprocket, it has the slowest mph top speed. However, after the simple mods, that gearing becomes too short, hence I went to a 15T for woods.

The XX doesn't have the aftermarket support to keep up with the Raptor. I think they are both very fast bikes in there own respect. Drag racing is not where the XX really shine's. It is a very good and fast bike though. Eat's up rough terrain like it is nothin.

I'm not into dragging, so that doesn't matter to me. I think the IRS would be pretty sweet in the woods I ride. Just need to find someone to let me test ride it... haha

The xx is a trail master! I let my 450r friend ride my xx and now he wants one. We got split up on the trails, he had a 15 min head start on me. The xx is so much faster on rough terrain I caught up to him. He couldn't believe how awesome the xx is in the trails.

If by slowest you mean drag racing at top speed, you're correct.


Drag racing ain't got nothin to do with top speed....its how fast you get there.:hey:

^^^ Exactly, what good is top end when they have already been there and on the brakes.

In the August 2010 issue of DirtWheels they tested all 450's full modded except the ktm. Each one got at least the big three and new cam. Some got port+polish, higher compression, and bored throttle body. The only thing they did with the kfx was big 3 and the dirtbike cam and said it was easily the fastest 450 out there. The kfx has a great motor, it just can't breathe when stock.

The only thing they did with the kfx was big 3 and the dirtbike cam and said it was easily the fastest 450 out there. The kfx has a great motor, it just can't breathe when stock.

Big 3 and cam and it was the fastest 450 against others with piston, P & P and bored TB.......I am waving the BS flag......Twice

I raced a ltr 450 weekend before last. It was a 3mod bike on 18" tires. I beat him but not by much. I got the EHS big 4! I launched in 2nd with the 14tooth and he was right beside me til I hit 3rd. Then I slowly started to pull away from him.


That LTR is a beast when opened up. Some of those motors are easily making 60hp and yeah the 18s are killing him too;) Don't race him on a mx track;)

Yea they are quick for sure. He said it had 57 hp and I just laughed. It's just a big 3 bike. My buddy had a big bore ltr and it only had 47hp. I'm not downing them. They are awesome machines and are very popular around here.

Big 3 and cam and it was the fastest 450 against others with piston, P & P and bored TB.......I am waving the BS flag......Twice

dirt wheels did that test and i think they did say the kfx had the most motor with minor bolt ons......but it is dirtwheels.....they don't impress me that often

Big 3 and cam and it was the fastest 450 against others with piston, P & P and bored TB.......I am waving the BS flag......Twice

Kawasaki gives Dirtwheels more kick backs than they give you though.

Anyways, I think its incredible how fast the 450's are! I wonder if Honda did a DOHC motor like in the 450's what kinda beast it would make the xx. I really dont know much about the engineering behind why Honda went with the head they did but I wonder what kind of monster it would be with a 5 valve dual cam head? Also saying dont race a 450 on the track is funny to me, the xx was never made to hit the track just like the 450's really aren't made for trails. I proved that last weekend. A 450 will blow me away on the track with the right rider and I'll blow the 450 away in the trails. The xx is simply the comfort king on abused trails. It takes a lot out of me to make it happen on the track. I did race a yfz450 on a small track at rocky glen, the guy couldn't lose me and i would say we had close to equal riding abilities.

Agreed^^

Not a fan of the kfx. Seen one blown up 3 times, all new built motors with less than 20 hrs. The racer who had it said it made him nervous t race because it chucked the rod through the case while going up the face of a 60ft tabletop. Since been sold and he has 2 450R's, ones a 520 or something and the other is a built 450. The 520 puts out 54hp.

Honda reliability can not be beat IMO

I thought the new yfz450x was the fastest quad out. I've read that they do 85mph stock but not sure how true that statement is.

I thought the new yfz450x was the fastest quad out. I've read that they do 85mph stock but not sure how true that statement is.


I would think there only in the 70s somewhere stock.

Not to get off topic but anyone see the new YZ450F, they turned the top end around or something like that so that the exhaust dont come out the front, it goes straight back where the intake would usually be.

Yamaha seems to be on the right track, gotta say that about them.
http://www.yamaha-motor.com/sport/products/modelgallerylib/209/1/0/gallery.aspx