Knocking on the rear wheel

[fazil]

Hello everyone,

While i was on a 250 miles trip to west coast, suddenly in the middle of the road i heart a knocking sound from the rear of the bike. I am not sure what it is but it sounds like bearing to me. It can be heart just when i ride slow and when i shut down engine and take the bike to center stand and turn the wheel by hand, it can be heard.
Just once in a full chain circle. Not everytime at the same place.

Is it bearing?
Do i need original yamaha bearings or they are universal.

Thanks for reading.


Ps: My rear wheel have been punctured just before i go to the road, may be something went wrong while putting it back on.

 

[DavesFZ]

My first ideas are the chain is jumping off the rear sprocket and falling back down, or a stuck link in the chain. A stuck link would be at the same spot each revolution though...Both should be evident while slowly spinning the rear wheel while watching the rear sprocket/chain relationship. Did you align the rear wheel properly when you remounted it? You can also check each link in the chain for a "hinge" that is frozen.

 

[fazil]

Checked chain for a spot but it looks good to me.
I tried chain adjusters but no way.
May be the mechanic forgot some parts when installing back.

 

[DavesFZ]

Checked chain for a spot but it looks good to me.
I tried chain adjusters but no way.
May be the mechanic forgot some parts when installing back.

Can you explain what you mean by "no way"? Maybe take a picture of your swingarm to rule out a missing component.

 

[TownsendsFJR1300]

After PM'ing me yesterday, did you remove the wheel and check for that wheel bearing (needle bearing, left side) spacer, was it there?

Did you also feel/turn the axle bearings and the hub bearing??

Also, you didn't respond, how tight was the axle when you turned the nut? if that spacer is missing, the axle would likely be a bit looser than normal.


***As a side note for others, the rear wheel was removed for a tire repair by a mechanic and the left spacer in the wheel, just inner of the hub is suspected to be missing . The issue started after that service.

 

[fazil]

Hello,
Sorry for late update.

I took off the rear wheel and i suspected one of the bearing is broken. I guess the 2 tubes that are seen in the service book are not there. Mechanic have forgot to put them back in while punctiring the rear wheel.
So i called him and asked him to send me back those remaining parts.
He said he'll check the garage for those parts. What a mass.
I paid $30 for 2 bearings and wating for the lost tubes at the moment.

#6-7 are the lost parts.
#13 (bearing) is broken and that makes the noise.

http://www.partzilla.com/parts/search/Yamaha/Motorcycle/2005/FZ6+-+FZ6STC/REAR+WHEEL/parts.html

 

[Tailgate]

I know that probably all the parts shops/dealers are similar in pricing, I still am amazed out how high prices are. Even just for something that, if for an automobile, would probably be under $3.00 but, when for a Yamaha, around $20.00.

 

[FinalImpact]

I can't imagine the need to dump out parts like those spacers while changing a tire. I hope get all your money back from the tire repair guy.

Those bearings were not meant to take the side load imposed but sucking the inner races together w/out a fixed space between them to tighten against.

A little run a bad luck I'd say.... So how about those fork? How is the nose working for you?

 

[TownsendsFJR1300]

I can't imagine the need to dump out parts like those spacers while changing a tire. I hope get all your money back from the tire repair guy.

Those bearings were not meant to take the side load imposed but sucking the inner races together w/out a fixed space between them to tighten against.

A little run a bad luck I'd say.... So how about those fork? How is the nose working for you?

Part #7, the spacer that rides inside a needle bearing, will literally fall out (if not held in with a lot of grease) once you pull the sprocket hub off. It is needed at the shop for static balancing purposes, likely it fell out while on the tire changing machine.. (I tape mine in to the wheel when it goes to the shop)

IMHO, HE needs to picking up the tab for all the parts, he screwed up big time.

It wouldn't be a bad idea to replace the dust seal, (part #14) as it may get damaged when removing the hub bearing.

**NOTE, on the NEW BEARING, DO NOT HAMMER on the INSIDE edges of the bearing on the installation, just the very outside going in straight...


I hope he didn't bend the swing arm in if he leaned on the wrench hard while assembling it.

 

[fazil]

Bike is on the road again.
Mechanic sent lost tubes and they fit like a glove.
I call it bad luck. I was there when he was changing and balancing that tyre.
We both skipped those pipe tubes.

I paid $30 for work and $30 for bearings. Totaly $60. Not bad for a big mistake.

I am not mad at the mechanic, he sent the tubes immediately. Case closed for me.


Didn't change the dust seal. It seemed ok. Swingarm seemed a bit stressed while taking out the wheel but nothing major. It looks elastick.

About R6 front end. It is worth for all the work that i have done. Very stable and has more immediate respond to road. Bike's front is a little bit heavier than before but it feels heavy just when you stop and turn the handlebar.
On the road, heavy is better. Brakes are also more responsive.
And bike seems more beautiful with this mode.


Thanks for the help. And don't forget that tubes when you do your tires