compression/starting problems

[J Fortner]

Any idea what would cause wear between the rear drum assembly and rear hub coupling assembly? Photos here: http://langly.smugmug.com/photos/7849614-M.jpg http://langly.smugmug.com/photos/7849618-M.jpg I am confused. It does not seem there should be any contact between the rear drum assembly and rear hub coupling assembly at the point of wear, since the rear axle sleeve fits in between these two parts? There does not appear to be play in the wheel bearings. The rear damper appears to be in good shape. There apeared to be plenty of grease in this area. Thanks in advance for any help, Jim

[J Fortner]

Any idea what would cause wear between the rear drum assembly and rear hub coupling assembly? Photos here: http://langly.smugmug.com/photos/7849614-M.jpg http://langly.smugmug.com/photos/7849618-M.jpg I am confused. It does not seem there should be any contact between the rear drum assembly and rear hub coupling assembly at the point of wear, since the rear axle sleeve fits in between these two parts? There does not appear to be play in the wheel bearings. The rear damper appears to be in good shape. There apeared to be plenty of grease in this area. Thanks in advance for any help, Jim

[langly944]

Any idea what would cause wear between the rear drum assembly and rear hub coupling assembly? Photos here: http://langly.smugmug.com/photos/7849614-M.jpg http://langly.smugmug.com/photos/7849618-M.jpg I am confused. It does not seem there should be any contact between the rear drum assembly and rear hub coupling assembly at the point of wear, since the rear axle sleeve fits in between these two parts? There does not appear to be play in the wheel bearings. The rear damper appears to be in good shape. There apeared to be plenty of grease in this area. Thanks in advance for any help, Jim

[squasher_1]

--- In DSN_klr650@yahoogroups.com, "langly944" wrote:

> Any idea what would cause wear between the rear drum assembly and

rear

> hub coupling assembly? > > Photos here: > http://langly.smugmug.com/photos/7849614-M.jpg > http://langly.smugmug.com/photos/7849618-M.jpg > > I am confused. It does not seem there should be any contact between > the rear drum assembly and rear hub coupling assembly at the point

of

> wear, since the rear axle sleeve fits in between these two parts? > There does not appear to be play in the wheel bearings. The rear > damper appears to be in good shape. There apeared to be plenty of > grease in this area. > > Thanks in advance for any help, Jim

is this the first time you took the hub off? is your bike new? maybe the previous owner had problems and installed new bearing. My sprocket hub twists a little when the bike starts to move and the bearings were worn, but I dont have any rubbing

[J Fortner]

squasher_1 wrote:

> <>is this the first time you took the hub off? is your bike new? maybe > the previous owner had problems and installed new bearing. My > sprocket hub twists a little when the bike starts to move and the > bearings were worn, but I dont have any rubbing

The hub has been off several times for tires changes. Bike is an A7. I don't recall seeing the galling before on previous tire changes. Could it be from hard impact on the rear wheel, which did see a lot of bottoming earlier this year at Big Bend on the stock shock? It seems the only way these two peices could come in contact would be with worn bearings or if the sprocket coupling assembly was out of alighnment. Or perhaps if the rear axle sleeve was not alighned properly. I saw no wear on the rear axle sleeve. Jim

[squasher_1]

--- In DSN_klr650@yahoogroups.com, J Fortner wrote:

> squasher_1 wrote: > > > <>is this the first time you took the hub off? is your bike new?

maybe

> > the previous owner had problems and installed new bearing. My > > sprocket hub twists a little when the bike starts to move and the > > bearings were worn, but I dont have any rubbing > > The hub has been off several times for tires changes. Bike is an

A7. I

> don't recall seeing the galling before on previous tire changes.

Could

> it be from hard impact on the rear wheel, which did see a lot of > bottoming earlier this year at Big Bend on the stock shock? It

seems the

> only way these two peices could come in contact would be with worn > bearings or if the sprocket coupling assembly was out of

alighnment. Or

> perhaps if the rear axle sleeve was not alighned properly. I saw no

wear

> on the rear axle sleeve. > > Jim

I think the sprocket hub bearing is bad. put the axle shaft through the bearing. with the sprocket aiming vertical like the letter "I". pull up and down on the shaft and see how much the shaft moves compared to the sprocket. 90 degrees or a right angle is perfect. anything more than that will tell you how worn out the bearings are. I dont know the proper term for that type of movemonet in a bearing.

[Jim Hubbard]

Mine looks exactly the same. I attributed it to dirt & grit getting into the space, since there's apparently nothing to stop it except for the fairly close fitting surfaces between the sprocket carrier and the wheel hub, but then I could be wrong. Kinda makes me wonder if big o-ring placed on the wheel hub end might help. Hmmm... Jim Hubbard

> -----Original Message----- > From: J Fortner [mailto:jim.fortner@...] > Sent: Sunday, August 29, 2004 8:29 PM > To: squasher_1 > Cc: DSN_klr650@yahoogroups.com > Subject: Re: [DSN_klr650] Re: KLR:Rear Hub/coupling assembly wear > > > > squasher_1 wrote: > > > <>is this the first time you took the hub off? is your bike new? maybe > > the previous owner had problems and installed new bearing. My > > sprocket hub twists a little when the bike starts to move and the > > bearings were worn, but I dont have any rubbing > > The hub has been off several times for tires changes. Bike is an A7. I > don't recall seeing the galling before on previous tire changes. Could > it be from hard impact on the rear wheel, which did see a lot of > bottoming earlier this year at Big Bend on the stock shock? It seems the > only way these two peices could come in contact would be with worn > bearings or if the sprocket coupling assembly was out of alighnment. Or > perhaps if the rear axle sleeve was not alighned properly. I saw no wear > on the rear axle sleeve. > > Jim > >

[J Fortner]

Jim Hubbard wrote:

>Mine looks exactly the same. I attributed it to dirt & grit getting into >the space, since there's apparently nothing to stop it except for the fairly >close fitting surfaces between the sprocket carrier and the wheel hub, but >then I could be wrong. Kinda makes me wonder if big o-ring placed on the >wheel hub end might help. Hmmm... > >

Thanks Jim. I thought the same. After ~4,000 miles of motly dusty off-road, there was a lot of of dirt and grit on the dust seals and outside of the bearings requiring extensive cleaning. After cleaning I packed extra grease in these outside areas to catch the dirt and grit before it intrudes into the bearings. The sprocket side dust and grit protection does not seem near as effective as the brake disk side dust cover. I wonder about an o-ring type gasket on the sprocket side of the hub. Sounds like a good idea.

[J Fortner]

squasher_1 wrote:

>I think the sprocket hub bearing is bad. put the axle shaft through >the bearing. with the sprocket aiming vertical like the letter "I". >pull up and down on the shaft and see how much the shaft moves >compared to the sprocket. 90 degrees or a right angle is perfect. >anything more than that will tell you how worn out the bearings are. >I dont know the proper term for that type of movemonet in a bearing. > >

Great idea. I will pull the wheel and check the play.

[J Fortner]

I was suspecting spacer number 42036 ""the rear axle sleeve"? caused the damage, since it actually sits on the axle in between the two areas that were showing wear. I'm not sure this was the problem as the 42036 spacer did not fall out of the sprocket coupling assembly immediatly after wheel assembly, it came out while cleaning the sprocket, carrier and damper. It may be that the 42036 spacer was not correctly installed and did the damage although it only seems to fit correctly one way. It does not look like the acrrier and hub are supposed to contact in the area of the wear. I am going to double check the bearings, assembly and fit. spacer no. 42036 Walt wrote:

>Did you have the spacer no. 42036 in the parts fiche diagram (file attached >to you but it will not post to the list) in between those parts? It can be >easily misplaced and cause your type of damage... and worse. > >