Differences between 03 & 04 yz450


2 replies to this topic
  • djo269

Posted September 15, 2005 - 01:15 AM

#1

What things did Yamaha change from the 2003 yz450 to the 2004 yz450? How much of a weight difference is there between the two years and what did they change to lose the weight of the bike? Was there a power difference, did they give it more power in 04? thanks

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • Matt96xr6

Posted September 15, 2005 - 06:42 AM

#2

Biggest difference is the 46 mm 03 forks and then the 48mm single chamber 04 forks.

Weight about the same.
Power, they took some of the hit out of the bike.

Go to Yamaha-motor.com and do a Specification comparison on the 2 modoels.

  • grayracer513

Posted September 15, 2005 - 07:14 AM

#3

The weight was close, but the '04 is lighter. Another nice little add-on was Ti footpegs. The forks were a significant improvement.

How they altered the power character is not clear to me. Their website said it had more rotating mass, but the crank and flywheel assemblies are the same, and the two bikes post nearly identical numbers on the dyno. It probably had something to do with ignition mapping. I know on my '03 the FMF exhaust with the PB header makes the power much smoother, even while it actually adds a bout one HP to the peak.

Given the choice between two bikes with similar time, equipment, and price, I would pick the '04 without hesitating.





Related Content

Forums
Photo

05 yz450f not fast enough by RedeyeYZ


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  38 replies
Forums
Photo

1998 yz400f will not idle. by trolley


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  32 replies
Forums
Photo

Megabomb Fitment by 288yz450


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply
Forums
Photo

BIGBORE FOR YZ450F 2006? by Taattie94


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 5 replies
Forums
Photo

Snake pit oct 30th by The Anvil


Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies
 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.