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06 Honda cb919. The back wheel just started wobbling and is loose yet the nuts are tight. A thin sliver of rubber is sticking out from the center of the wheel that I a little more is a seal of some kind. I'm no mechanic but can usually fix anything as long as I know what's wrong with it. Anyone know what this is?
 

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Set the bike so that the back wheel is off the ground. The center stand usually can do this. Remove the split pin and nut from the axle shaft. Remove the axle shaft by pulling or tapping it out. Remove the wheel. Inspect the outer seals, and the bearings just inside of the seals. If it has a rear disc brake, put a thin piece of wood between the brake pads to hold them apart.

Report back. UK
 

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06 Honda cb919. The back wheel just started wobbling and is loose yet the nuts are tight.
Play at the wheel rim is usually caused by wheel bearing failure.

A thin sliver of rubber is sticking out from the center of the wheel that I a little more is a seal of some kind.
If the seal is torn up, this suggests that the bearing has completely collapsed and the bike is
not safe to ride.

I'm no mechanic but can usually fix anything as long as I know what's wrong with it. Anyone know what this is?
Replacing wheel bearings is a fairly common job for the home mechanic. The most difficult part is
drifting out the old bearing(s). As the wheels are usually made from a soft alloy and are very
expensive to replace, you need some skill to get the bearing out without doing damage.

One question for you: You said "the nuts are tight". Does your bike have a single-sided swingarm
or the 'conventional' double-sided type with an axle through the wheel?
 

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Welcome to the Forum.

If your rear sprocket rides in a "rubber' cush drive, the rubber inserts could be completely deteriorated , causing the sprocket to wobble:surprise:

However, if the rear rim and tire has lots of movement causing the wobble, it is undoubtedly bad wheel bearings as had been said.

If you can't do it yourself, just take the rim off and take it to a Honda dealer and let them replace the bearings, which they do all the time.

Sam:grin:
 

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Wheel bearing failure.
Don't ride the bike, not 10 feet.
Take off the wheel, you'll see the problem.
Either change the bearing or have it changed.
 

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It's the double sided swing arm.
That will make life a bit easier.

I didn't know what a CB919 looked like until I checked Google. There were sold as
the Hornet 900 on this side of the Atlantic.

I don't think the CB9xx has a centre stand, so you will need a paddock
stand or some way of supporting the bike so that you can remove the
wheel.

Bearings generally don't wear out due to age or mileage. Failures are
usually due to contamination by water and dirt. Once you remove the
outer seal, you will probably find a rusty mess inside.

Bearings are relatively cheap. Any of the big brands should be fine.
I have a preference for Japanese made Koyo bearings, even if they
cost slightly more. IMO, it is better to buy quality bearings from an
industrial bearing suppler rather than a packaged kit with bearings
and seals from a motorcycle shop. Most of the packaged kits come
with Chinese bearings. These are generally ok, but not anywhere
near the quality and durability of the best Japanese bearing makers
like Koyo, NSK, NTN and others.

As Porky said, you can get your local shop to replace the bearings.
If you do it yourself, you will need tools to remove and refit the wheel.
Take note of where the spacers go. Watch out for the spacer between
the sprocket carrier/hub and the wheel.
You will also need a few blocks of wood to support the hub from
underneath while you drift out the bearings. You will need a suitable
drift to drive out the bearings. The first one is tricky because the bearing
spacer sleeve will be in your way. I use a set of large pin punches and
a dangerously heavy lump hammer. Remove the seals and make sure
there isn't a circlip or any other retaining device outside the bearings
before you start.

While you are at it, check the condition of the front wheel and
steering head bearings.

Good Luck.
 
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