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bdmmotard

wr400 supermoto wheels, rear hub question

7 posts in this topic

are the 98 wr400 hubs the same as the 99 wr/yz hubs? i'm selling my supermoto wheel set, and wondering if they'll fit ALL 400's.

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Negative. The 1998 hubs are different. It is possible but you need to change axles. Smaller diameter.

fershy

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Negative. The 1998 hubs are different. It is possible but you need to change axles. Smaller diameter.

fershy

Same as ^.

1998 -> Rear bearings are 20x42x12 (mm) and the hub uses 3 bearings

http://www.pivotworks.com/search.asp?notrack=yes&Type=Bike&Make=YAMAHA&Model=WR%20400F&Year=1998

http://www.pivotworks.com/display.asp?Part=PWRWK-Y06-421

1999 + -> Rear bearings are 22x44x12 (mm) on one side and a 22x50x14 (mm) on the other (2 bearings).

http://www.pivotworks.com/search.asp?notrack=yes&Type=Bike&Make=YAMAHA&Model=WR%20400F&Year=1999

http://www.pivotworks.com/display.asp?Part=PWRWK-Y08-421

I find the Pivot works site a quick and easy way to check bearing sizes for your wheel , but won't tell you if the overall hub width is the same. For that, as far as I know, you got to cross reference hub part numbers and rely on people's experience.

This is a thread I found that shows what wheel's interchange on Yamaha 's (Posted by freshy - I guess he's in the know when it comes to wheels!!!):

ok, I'll sum it up for you. Any YZ hub, 125, 250 250F 400 426 450, 1999-2004 will work. The only thing you will run into is that the rotor sizes changed a couple times on both front and back rotors. This will cause the caliper to either foul or not contact enough of the rotor. No problem, if you use the correct rotor. On the rear rim, 125's and 250's use a 1.85" rim rather than the 2.15" found on YZ 250's and 400 426 450's. On the WR series, the hub is also slotted to accept a speedo drive but will work on a YZ or a WR without the speedo drive with a YZ axle spacer in place. By the way I have personally tried a 2004 YZ250F front on my 1999 WR and it does fit.

fershy

-> I guess the exception to add to the above is 1999+

Link to the complete thread:

http://www.thumpertalk.com/forum/showthread.php?t=173091&parentpage=14

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I believe the sprocket inside diameters are larger on the 98 rear hub. A friend of mine ordered a sprocket for a 99 YZ400 on accident, and it didn't fit his 98 YZ400 (luckily I had the 99, so I got it cheap). I also think Yamaha put Excels on in 99+ along with the rear hub change.

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