flywheel weight, 06 YZ450F

This a point I've made several times. Dr.D, GYT-R, and other flywheels that add weight by welding a ring to the outside of the flywheel concentrate the added weight at the most effective place on the flywheel; the outside edge. Bolt-on weights necessarily have a center hub area that's used to bolt it in place, and the weight of that portion of the weight does not contribute as much inertia as the mass placed nearer the outside of the part. That often means that a lighter welded weight is as effective as a heavier bolt-on.

Additionally, welded weight flywheels are balanced after the weight is added, and there are no bolts to loosen up.

I had a heavier flywheel on my 04 that actually de magnatized the magnets then the stator did not stator and it didnt run.

I can't find either of these flywheels anywhere...apparently they're on backorder with Yamaha. Anybody know of a place that might stock them?

are they much trouble to install?

I can't find either of these flywheels anywhere...apparently they're on backorder with Yamaha. Anybody know of a place that might stock them?

Really? I just went in to the dealership and ordered it and it was there within 2 days. I hate to buy from the dealer but that is the only place I know of that sells GYTR. Maybe try Yamaha of troy's website. I see their ad in Transworld says they stock oem parts.

are they much trouble to install?

Nope, just drain the oil, remove the side cover. You need the newer flywheel puller, the one from 03-05 will not work. Pop it off, replace with new one , torque to 40 lbs., place new included gasket, then bolt the side cover on. Fill with oil and :devil:

Why drain the oil? If you run the engine for a couple of minutes before pulling the ignition cover, you'll lose next to nothing.

I can't find either of these flywheels anywhere...apparently they're on backorder with Yamaha. Anybody know of a place that might stock them?
Then go with the Dr.D. It's an exchange program, but he will let you order one without having yours first. There's a refundable $200 core fee that gets charged when you place the order, but as soon as your stocker gets to him, that charge is reversed. And, like I said, if you ever want to try a different weight, he'll exchange for no more than shipping.

Dr. D's website says they only weights up to 2005 YZ450's. Maybe they haven't updated their site in a while. I will call them on Monday and see.

No dice. Dr. D is not making weights for the 06's.

According to the chick that answered the phone, Doug doesn't feel that the 06's need a flywheel weight.

Guess I'll call Steahly.

For MX or fast trail riding, I don't think it does either.

I just put the offroad weight on my 06 and road it down the road and notice a difference. I'm racing in a ISDE this weekend on it so I'll let you know how it worked. Before out where I ride there is a lot of tight wood sections and I was having problems stalling the bike and it felt like I was slipping the clutch way to much. SO hopefully this will help.

I can't find either of these flywheels anywhere...apparently they're on backorder with Yamaha. Anybody know of a place that might stock them?

Try Tracey's Yamaha Parts Warehouse 1-800-860-0686. They have great pricing and if usually can get GYT-R items in a couple days.

the fww on the 450s is a must have! it actually made my 06 faster! more traction and more control of the power

Just FYI that http://www.proracing.co.uk/index.htm carries their own FWs. These guys are super nice and easy to work with (Nick and Bev). You can get the FW in stock weight, 5 oz. over and 10 oz. over.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now