Author Topic: Rd400 wheel bearings  (Read 350 times)

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Offline rd400greenhorn

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Rd400 wheel bearings
« on: February 08, 2021, 04:14:02 PM »
Hi guys
Got these all balls bearing set for the front and rear.

The rear has 3 bearings
2 big and one smaller

Now if i fit both big bearings on the sprocket side, it Cant take Any seal, so do I only fit one bearing or? 🤔🤔

Online m in sc

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Re: Rd400 wheel bearings
« Reply #1 on: February 08, 2021, 04:18:48 PM »
the 3rd bearing isn't used on a cast 400 wheel. thats for rd 350/350 with separate sprocket carrier.


Offline rd400greenhorn

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Re: Rd400 wheel bearings
« Reply #2 on: February 08, 2021, 04:33:47 PM »
Perfect
Thank you!

Offline rd400greenhorn

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Re: Rd400 wheel bearings
« Reply #3 on: February 09, 2021, 11:38:29 AM »
Having doubt here Cant trust my haynes 😁

Is it bearing in, spacer and bearing on other side
Then fit the small spacer Inside the bearing on the sprocket side?
Or

Offline rd400greenhorn

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Re: Rd400 wheel bearings
« Reply #4 on: February 09, 2021, 11:40:53 AM »
I kind of think the smal l spacer needs to be on the Inside of the bearing having that Extra mm spacer touvhing the big spacer making it one solid piece for the axle

Online m in sc

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Re: Rd400 wheel bearings
« Reply #5 on: February 09, 2021, 11:44:08 AM »
should always be a spacer between the bearings in the wheel. usually has a thin metal collar on it about halfway down. 

Offline rd400greenhorn

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Re: Rd400 wheel bearings
« Reply #6 on: February 09, 2021, 11:51:32 AM »
Yes i got it.
So the big spacer in the wheel with the collqe and qlwo q small one sittin in one of the bearings wirh a small collar to go against that spacer and it makes a perfect fit.

Offline Plasticman

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Re: Rd400 wheel bearings
« Reply #7 on: February 16, 2021, 05:34:32 PM »
Does anyone have dimensions for an RD400 cast wheel bearing spacer for use inside the wheel between the spacers?  I've lost mine and wanted to make a new one.

Rob
1976 - RD400 - road racer
1977 - RD400 - project (single shock/cartridge fork/modern wheels/brakes)
1978 - RD400 - Auburn themed motorcycle
1979 - RD400 - Daytona (under restoration)

Online m in sc

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Re: Rd400 wheel bearings
« Reply #8 on: February 17, 2021, 04:46:08 PM »
you know the id, make the od the same as the inner bearing race od (min) and go .5 mm longer than shoulder on rim. this will keep bearings from crushing. ;)

dont forget to make the middle ring so it wont 'fall down' inside the rim.

Offline Plasticman

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Re: Rd400 wheel bearings
« Reply #9 on: February 23, 2021, 11:21:33 AM »
I need the length.  As you suggested, I know the inside diameter and the outside one isn't critical.

Rob
1976 - RD400 - road racer
1977 - RD400 - project (single shock/cartridge fork/modern wheels/brakes)
1978 - RD400 - Auburn themed motorcycle
1979 - RD400 - Daytona (under restoration)