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Message started by grim on 04/16/07 at 17:38:53

Title: Flywheel bearings
Post by grim on 04/16/07 at 17:38:53

So I have the left engine half sitting on my table.  I check the play of the flywheel bearing in the left engine half.  It moves.  But the flywheel sits on two bearings, the other on the right engine half.  So the question is, is this bearing supposed to have some play or can it have some play?  You figure all the weights being thrown around on this axel might cause more bearing degradation.  

Even if I want to replace this bearing, I cannot find the Flywheel holder on bikebandit or ronayers.  Any suggestions?

Basically, do you think play on this bearing is normal seeing that the flywheel is on two bearings? or am I just fooling myself.

Thanks

Title: Re: Flywheel bearings
Post by justin_o_guy on 04/16/07 at 18:09:06

Page 3-44 Zuki shop manual, shows diagram of HOW to inspect the bearings, but doesnt specify what amount of play is too much. Says" Inspect inner race by hand while it is in the case. Rotate crankcase bearing by hand to inspect for smooth rotation & & abnormal noise. Replace bearing if there is anything unusual" Heck, its unusual to have one OUT!

The diagram shows pressure applied to force the inner race along the line of the crank & 90 degrees from that line. Checking each for travel. Maybe calling the dealership & asking how much is okay. IF they ask How much have ya got, stick with the question, How much is okay.. Once ya tell em how much there is, no matter how small, it may just be time for a new bearing.. Uh humm,, coff coff.. Call it Butt covering or just wanting to sell a part,, who knows?
I wish I could be more helpful, but that's all I got Dude..

Title: Re: Flywheel bearings
Post by Max_Morley on 04/16/07 at 20:39:26

I don't have the notes any more, but at some I point in my technical training it seems like  0.004" is the maximum allowed movement axially in a ball bearing. That isn't much but more would let the parts move around too much. As it is oil lubricated vs grease it will run OK at 0.000 clearance. Grease filled bearing need a little movement to allow the grease to work its way around the balls or rollers. If yu are working on the LH side the rotor doesn't want to move enough to touch the stator. Usually as long as the oiled bearing has no roughness or tight spots it would be servicable. Any good gear puller should get it off and a good machine shop can press the new one on w/o messing up the parallalism or concentricity of the crank parts. When I've done the smaller single cylinder Honda, sometimes the bearing stays in the case and slides off the crank and other times it stay with the crank. In any case you do not want to put much pressure or ahmmering through the balls or failure possibilty in increased. Max

Title: Re: Flywheel bearings
Post by Reelthing on 04/16/07 at 20:40:55

ok - i'm cornfused as normal - which of these bearings has play as I still looking for a flywheel


http://images.powersportsnetwork.com/fiche/images/Suzuki/1995/Motorcycles/1885_5.gif

http://images.powersportsnetwork.com/fiche/images/Suzuki/1995/Motorcycles/1885_6.gif

Title: Re: Flywheel bearings
Post by grim on 04/16/07 at 22:48:19


http://w2.bikepics.com/pics/2007%5C04%5C17%5Cbikepics-867189-800.jpg

And I am going to replace the freakin bearings....another week to wait for parts.....This whole project is a waiting game.  


Title: Re: Flywheel bearings
Post by justin_o_guy on 04/16/07 at 23:05:39

Part Numbaah Niine, the winnah,, so, how many miles on it? How much slop in it? Have ya compared it to the other side yet? Ohh, BTW, how much $$ to replace?

Title: Re: Flywheel bearings
Post by justin_o_guy on 04/16/07 at 23:18:11

Since the cam chain is out of mine, the right end of the crank is right there & easy to grab. It doesnt have nay play in any direction with the easy grab I put on it. I didnt try real hard, but, it is fully assembled & I am sure that stabilizes it quite a bit. Did you, by any chance, mess with the ends of the crank before it came apart? I wonder if it's reall okay, BUT, if I had mine apart & wondering I would most likely change the bearings than risk having to go back anytime soon. Sorry you havin to wait & spend more $$.. The whols scenario is really pretty,, well, grim. sorry,, Ive been looking for a way to do that... ;)

Title: Re: Flywheel bearings
Post by Greg_650 on 04/16/07 at 23:48:31

You need to be able to feel the bearings with your fingers too.  Like Max says, about .004" is it.  Think of the amount of clearance in the valve adjustment.  That's it.

Generally if you can feel ANY roughness in rotation or ANY play between inner and outer races, you have exceeded that amount.

Since you are here, it will probably be better to just replace them anyway.  Do the rebuild right.

Not sure about these engine bearings, but get the numbers and check with a bearing supplier like SKF if you have one nearby.  If any of the bearings are a shelf item, you'll save big bucks over the dealer cost.

Title: Re: Flywheel bearings
Post by grim on 04/17/07 at 14:15:31

Showed the engine half to a bike mech neighbor.  He is suggesting bearing replacement, and piston rings while we are here.  

bike does have 34000 miles....so probably due anyway..
other bearing has no play.  parts are 60 bucks for that one bearing...neighbor said he could lend me the flywheel holder....sweeeet

Grim joke is quite funny.... ;)

Title: Re: Flywheel bearings
Post by Greg_650 on 04/17/07 at 21:07:27

$60 for a bearing?

???

Title: Re: Flywheel bearings
Post by Reelthing on 04/17/07 at 21:36:28

From crotchrocket.com:

9 BEARING, LH ( 40X80X18 ) 09264-40002  1 $48.38  
 
is a bit pricy

Title: Re: Flywheel bearings
Post by justin_o_guy on 04/18/07 at 06:47:42

Haul that bearing into an industrial bearing supply house & let them look at it, they may have something on a shelf that does the IGGzakt same thing for lots less $$. Just a suggestion..

Title: Re: Flywheel bearings
Post by Kropatchek on 04/18/07 at 08:19:55

Sorry guys, can"t advice you where to buy from the other side of the pond.
But the rollerbearings are a standard seize and can be bougth from SKF, Timken or the like for prices LESS than $60.

Title: Re: Flywheel bearings
Post by grim on 04/18/07 at 22:56:41

too late....didn't want to risk it either.....

I think I spent too much on this bike now.....most went to USPS and UPS

Title: Re: Flywheel bearings
Post by Reelthing on 04/18/07 at 23:05:52

never can spend too much! (only all you got)

Title: Re: Flywheel bearings
Post by Greg_650 on 04/19/07 at 21:19:23


justin_o_guy wrote:
Haul that bearing into an industrial bearing supply house & let them look at it, they may have something on a shelf that does the IGGzakt same thing for lots less $$. Just a suggestion..

Look above Justin.

Title: Re: Flywheel bearings
Post by Greg_650 on 04/19/07 at 21:21:03


Reelthing wrote:
never can spend too much! (only all you got)

Don't ya just love it.  Ya try and they do it anyway :P

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