(4th) Fourth Wheel kit Help

[RX1Jim]

What is the advantage(s) of running a fourth rear wheel?

 

[Big Ken]

Keeps the track tension equal and straighter.

 

[Srxspec]

Its quite easy if you have access to a lathe, if not if you take your time a hacksaw will work.Just measure the small inner spacer and then cut the longer spacer to that size.Then measure the bearing thickness which is .590 thou or 15 mm for a 6205 bearing.Then with the remaining spacer that you cut for the smaller spacer remove this amount.So now you will have two small spacers and one center.I have made my own for the past 15 years.yes they should be standard but its Yamahas way of saving weight and a few Yen.

Measurements for a FX Nytro.

Cut a .975" piece off the long spacer to make your new short spacer.

Cut an additional .473" off the long spacer to take up for the 6004 bearing.

Once done it looks like this.

 

[SledFreak]

Is that the same for the Apex?