View Full Version : 2004 yamaha yfz450
660bigdaddy
06-04-2003, 09:47 AM
welcome to the newest sport quad to enter the market...
660bigdaddy
06-04-2003, 09:48 AM
another...
660bigdaddy
06-04-2003, 09:50 AM
white yfz450
sweet300ex
06-04-2003, 09:55 AM
OMG!! Thats awesome! i never new!!!
sorry dude but this has been posted plent of times
roostin_dale
06-04-2003, 02:17 PM
yes it has been posted plenty of times..but its still fun to look at and think about!
Trivia.
Who's the rider on the 1st pic.
CBRSLIDER
06-04-2003, 09:08 PM
Barry Hawk:D
Am I right?
Ray
Originally posted by CBRSLIDER
Barry Hawk:D
Am I right?
Ray
Yup. You win... " A beer filled donut"
motoracer11
06-05-2003, 03:22 AM
i knew it was hawk, but i wasnt able to log in to say it was him
go hawk go
monkeyboy
06-05-2003, 03:23 AM
iz dat one of dem cannunduls:confused:
UglyMotha™
06-05-2003, 04:37 AM
.
James70214
06-05-2003, 04:49 AM
It is also interesting that they destroked it to 439cc. They also used a lower compression piston. So it is detuned a little.
Originally posted by James70214
It is also interesting that they destroked it to 439cc. They also used a lower compression piston. So it is detuned a little.
Well the compression is at 11.9:1 . Im wondering if it should be ran on half 93octane, half race gas :confused: .
As for it being destroked, if you blow it up and have to rebuild it, you can get away with having it still under 450cc to reach the limit.
I think Yamaha did their homework on this one!
motoracer11
06-05-2003, 01:27 PM
Originally posted by Ryan
Well the compression is at 11.9:1 . Im wondering if it should be ran on half 93octane, half race gas :confused: .
As for it being destroked, if you blow it up and have to rebuild it, you can get away with having it still under 450cc to reach the limit.
I think Yamaha did their homework on this one!
sounds like they did a little bit more than homework
i wonder how often you will need a new topend
James70214
06-05-2003, 02:33 PM
I odn't think they did it for incase it blows up.
Just think what the limit is in the 250 calss and 4 stroke class!! I think we might see a team Yamaha racign quads.
250Xtreame
06-05-2003, 03:27 PM
the almost 8 grand price tag sucks though
but a major plus, dual piston front calipers!!
JustRace
06-05-2003, 03:57 PM
isn't that about the CR of the c-dales?
Originally posted by JustRace
isn't that about the CR of the c-dales?
Yessir, but how do they run pump gas in a 12:1 motor? I will never understand.
Dave400ex
06-05-2003, 05:46 PM
Go to ATV Scene they have a good story about it. I want one. :devil:
tprender
06-06-2003, 02:13 AM
Yamaha did there home work on this, not like Polaris did with there. Yamaha did read the rule book and saw that the limit was 440cc on most classes and it was to late to raise it to 450cc for the production classes. Where Polaris only read the bike part of the rule book with the limit for bikes last year was 530cc's. they did not check the atv section.
JustRace
06-06-2003, 06:10 AM
Heres my take on the quad. I think its a great quad but i see a problem with it. TONS of people are gonna want them that are not prepared for them. I believe this will be another higher maintance quad, like the c-dale. People will buy them, then never take care of them and of course things will break and blame it on Yamaha. The average person just rides for fun and they are gonna be buying a TRUE race bike.
Dave400ex
06-06-2003, 06:21 AM
As race ready as it is, it shouldn't be to hard to take care of. It's just like everything else, if you do normal checkups, keep the filter clean, oil fresh, and check over everything, I think you will be fine. But if you get behind on normal stuff, you will have problems but that's with any quad...
Originally posted by Dave400ex
As race ready as it is, it shouldn't be to hard to take care of. It's just like everything else, if you do normal checkups, keep the filter clean, oil fresh, and check over everything, I think you will be fine. But if you get behind on normal stuff, you will have problems but that's with any quad...
I agree. But im wondering if it is definitly needed to run partially race gas? Then again, as chef said, I've heard of people running pump 93 gas in their 12:1 cannondale motors.
I think Yamaha will definitly form a race team with this new atv. They had the enough balls to set it up and build this thing :macho .
EDIT: BTW, Do you guys think the Fan Cooling was a bad idea for the mud and the water :confused: .
JustRace
06-06-2003, 08:34 AM
I agree that it shouldn't be hard to maintain but i'm just thinking about all these people that are gonna buy them just because of what it is. Like the raptor. I know people with the 01 raptor that have never had a problem, while a lot of people got it just because it was a 660 and then did nothing to maintain the motor.
I'm not bashing the quad, but some of the people that will buy them. lol
MxDale71
06-06-2003, 04:09 PM
Guys, easy now... don't get so worried about stupid little things. If it's running 12:1 compression, it'll be recommended that you run premium unleaded (93 octane, although 92 will work) in the quad. My YZ 250F runs 12.5:1, I think, and I only run 93 in it. I don't think it'll be high maintanance, and shouldn't have to many problems like the C-dales. Really, the C-dales weren't very hight maintanance at all but they did have some problems, but just look at all the electricals and high tech sh!!t they had on them. The new Yammy won't be so bad. They seem to have racing on their minds a little bit w/ this quad and a company as big as Yamaha, I don't think they'll throw out something that has a lot of problems. Sure other first year model Yamahas had some problems, but I think they worked w/ this for a while and want to make a good quad from the start.
As for it being race ready... I don't think it's THAT race ready. They've detuned the WR version of the 450. The WR and YZ 450F both are solid motors and despite what many people say, they DON'T need frequent top end rebuilds. The detuned version of the WR especially won't need it. Don't be saddend by the fact that it's the WR motor though. The only real difference is a heavier fly wheel (which I've seen a lot of people go w/ on the YZF to make it more controllable) and different timing and cams... and the electric start ofcourse. They probably have a more restrictive exhaust and air intake, but we all know thats easily fixable :).
The 440 motor size is interesting (The ATVA limit is still 440, NOT 450) and the fact that it looks like it has # plates direct from factory is kind of interesting as well. I think you may see some partial factory backing from Yamaha next season, or even maybe a full fledged Team Yamaha racing team. Although I think they'll ease into the MX scene when it comes to quads at first and just do some partial backing. But hey, it's a start. You gotta start somewhere and work your way up. I'm really happy that you quad guys are getting some factory recognition. I'm not racing quads anymore, but I'm still a big fan!
660bigdaddy
06-07-2003, 03:40 AM
i thought the price was 6800.00 ? not 8 grand.:huh
trueblue450
06-07-2003, 04:04 AM
out the door your looking at 8 g's..
The dealers aren't gonna sell them at 6,899 cuz they know they are only getting a few of them this year, so they jack the prices up cuz they can. My dealer said 7,5 then you got taxes and registration.. :scary:
lil400exman
06-07-2003, 04:18 AM
just gett a r and still kill em:scary: :devil:
bradley300
06-07-2003, 05:19 PM
what do you mean, they did thier homework? looks to me like a current dirtbike motor inthe same ill handling chassis the raptor has. they threw in a few things to throw you off like rezzie front shocks, but look closer.
raptor plastic w/ a different grill, frame looks identical to a rappy (wich makes me wonder how much this thing will really wiegh)
at least they are trying something though
Dear Yammy- the new red color sceme looks great, but no matter what you try, it will not handle like a honda.:D
310Rduner
06-07-2003, 08:29 PM
what do you mean, they did thier homework? looks to me like a current dirtbike motor inthe same ill handling chassis the raptor has. they threw in a few things to throw you off like rezzie front shocks, but look closer.
actually they did their homework fairly well, they modeled it after the best frame geometry ever made.. the 250R:cool:
310Rduner
06-07-2003, 08:32 PM
also take note of the fact that they added dual piston calipers (like the R) cast aluminum or whatever compound Swingarm to save weight, magnesium engine covers to save weight... lightweight brake resevoirs... you can pretty much call Almost Everything on it lightweight.. and the fact that it is about 20 lbs heavier dry weight than a 250R also says something:rolleyes:
Sick0
06-08-2003, 03:24 AM
also the frame is made of high tensile steel which ain't the best steel in the world but better than tyhe rest of the steel production frmaes out there. Most frame are just made out of mild steel. They should make them out of either 4130 chromoly, or aluminum. Plus its lower than a raptor. There is lot of honda type design in this quad. It looks like a cross bread of a honda.
str400ex
06-09-2003, 04:30 PM
the top end is from the yz and the bottom end is from the wr with a wider gears for the quad application
holeshot19
06-10-2003, 02:02 PM
Originally posted by 310Rduner
actually they did their homework fairly well, they modeled it after the best frame geometry ever made.. the 250R:cool: all the top bikes look like 250r s with different engines.i have never understud why they havent copyed a r frame with the newer 4 stroke engine from the factory
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