HUB SPACER

[bama1]

Guys the big spacer in the rear wheel hub what if you do not put a spacer back in.What would happen I just did the genesis rear wheel swap and I didnt put the spacer back in the hub.I really dont know where I can get one made.If it means replacing the bearings once a year I will.I would appreciate anybodys help.
THANKS
BUDDY

[the fan]

Which spacer?

leaving out any of the spacers can and probably will put you on your head. It cant be that hard to purchase a new one or have one made.

[bama1]

Im not sure of the proper name but its like a piece of pipe or tube.

[bama1]

Maybe I should have said the spacer between the main two bearings.I do not explain my self well as you can tell.

[ccsct203]

http://www.bikebandit.com/assets/schematics/Yamaha/4630_52.gif

Look at item #4

[racerman_27410]

without that spacer you will not be able to properly torque the rear axle and will probably bend the swingarm trying to ...... which will in turn bind up the bearings inside the wheel.....


My advice?

DO NOT RIDE THE MOTORCYCLE WITHOUT THE CORRECT SPACER INSTALLED!!!!!!!


LET ME SAY IT AGAIN.... YOU   MUST  HAVE A SPACER INSIDE THE WHEEL BETWEEN THE TWO BEARINGS

YOU DONT WANT TO DIE DO YOU?

[Dan Filetti]

LET ME SAY IT AGAIN.... YOU   MUST  HAVE A SPACER INSIDE THE WHEEL BETWEEN THE TWO BEARINGS

YOU DONT WANT TO DIE DO YOU?

We're all adults here Frank, you don't have to sugar coat it -say it like it is man!



Dan

[higbonzo]

Bama1,

Maybe you could let us all know just what modification you did so as to be able to fit a Genisis rim on your bike?

Thanks.

Later...

[SlowOldGuy]

I woke up thinking about this.

Here's what will happen:
When you torque that axle to 108 ft-lb, that force is supposed to take up all the tolerance between the spacers and the inner races of the bearings.  What you get is a slight side loading of the bearings and a very high clamping force of the assembly between the swingarm sides.  This helps hold the wheel in place and all the riding stresses on the bearings are aligned perpendicular between the balls and the races.  This is how the bearing was designed to absorb this stress.

When you leave the center specer out, all that 108 ft-lb of clamping force is now exerting a MASSIVE side load into the two inner bearing races and trying to push them toward each other.  This is NOT what the bearing was designed for!  Now as the assembly flexes, the axle clamping force will be reduced and all that FJ engine torque will be directed into the left side wheel/chain alignment bolt.  That bolt is not up to this task and will eventually SNAP causing the wheel will to tilt violently in the swingarm and probably lock up and/or throw the chain.

This will happen at a most inopportune moment and the results will not be pretty.

Good luck,
DavidR.

[higbonzo]

Guys the big spacer in the rear wheel hub what if you do not put a spacer back in.What would happen I just did the genesis rear wheel swap and I didnt put the spacer back in the hub.I really dont know where I can get one made.If it means replacing the bearings once a year I will.I would appreciate anybodys help.
THANKS
BUDDY

I am not sure the wheel would even spin once you torqued the axle nut down.  And there is a good chance you will break the casting which holds the bearings in place.  You need the spacer!!!!!

[racerman_27410]

I woke up thinking about this.

Here's what will happen:
When you torque that axle to 108 ft-lb, that force is supposed to take up all the tolerance between the spacers and the inner races of the bearings.  What you get is a slight side loading of the bearings and a very high clamping force of the assembly between the swingarm sides.  This helps hold the wheel in place and all the riding stresses on the bearings are aligned perpendicular between the balls and the races.  This is how the bearing was designed to absorb this stress.

When you leave the center specer out, all that 108 ft-lb of clamping force is now exerting a MASSIVE side load into the two inner bearing races and trying to push them toward each other.  This is NOT what the bearing was designed for!  Now as the assembly flexes, the axle clamping force will be reduced and all that FJ engine torque will be directed into the left side wheel/chain alignment bolt.  That bolt is not up to this task and will eventually SNAP causing the wheel will to tilt violently in the swingarm and probably lock up and/or throw the chain.

This will happen at a most inopportune moment and the results will not be pretty.

Good luck,
DavidR.

like i said.....  IF YOU WANT TO CRASH AND TRASH YOUR FJ THEN LEAVE THE SPACER OUT!

[Mark Olson]

Guys the big spacer in the rear wheel hub what if you do not put a spacer back in.What would happen I just did the genesis rear wheel swap and I didnt put the spacer back in the hub.I really dont know where I can get one made.
THANKS
BUDDY

Buddy, any machine shop can make one for you out of bar stock cold rolled steel. probably take 20 min on a lathe. you just need the length of the spacer (inner race to inner race) the inside diameter (axle thickness plus .015) and the outside diameter (the diameter of the inner race before bearing contact) specs.

do not attempt to ride your bike without it you will damage the bearings and swingarm at the very least. the reason it is there is to provide opposing force to the bearings applied from the torque of the axle and wheel.

[bama1]

Sorry guys Im putting a FZR1000 GENESIS rear wheel on my 89 FJ.Thanks for everybodys input.I had looked on the FJ MODS web site and a guy had all the information on the rear wheel swope.It looks like I need a 133mm spacer made.
THANKS GUYS