GYTR Flywheel Question


1 reply to this topic
  • yz_for_me

Posted January 03, 2005 - 04:44 PM

#1

Yamaha lists its model GYT-5TA97-50-00 flywheel as being 1.4 kg-cm^2 inertia weight. How does this translate into the standard ounce designation all the other flywheel manufacturers seem to use? I'm guessing this is an 8 oz flywheel, but since kg-cm^2 is a unit of rotational inertia and oz is a unit of mass, there is no way to directly convert one to the other. I am assuming flywheels that use ounces to designate their inertia are actually oz-in^2. Does anyone kwow if this is correct?

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • grayracer513

Posted January 03, 2005 - 06:34 PM

#2

There are two GYT-R flywheels that I know of. The lighter one is about a 5oz ring weight added to the original '03 YZ450F flywheel. This one came stock on the '04 as original equipment. The heavier one is about 8 oz added the the '03 flywheel, making it 3 up on the '04 model.

Compare these directly by weight only to weld-on types such as those from Dr.D, because the entire weight is added to the outside diameter of the flywheel. This makes the weight more effective in adding inertia to the rotating mass of the engine than bolt-on weights, ounce per ounce, since part of the weight of a bolt-on is given over to a center flange for bolting the unit on, and is so close to the center it doesn't do much.
:cry:





Related Content

Forums
Photo

Megabomb Fitment by 288yz450


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

yz250x vs 450 4t comparisons (preferably desert riding) needed by JakeNorthrupYZ450F


Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • 9 replies
Forums
Photo

Michigan Motocross Tires by 288yz450


Dirt Bike   Dirt Bike Regional Discussion   North
  • 1 reply
Forums
Photo

2016 YZ450 by CaptainKnobby


Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies
Reviews

Yamaha YZ450F 2017 by Chris.GVS


Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On January 15, 2017
 
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.