A forum for owners of Yamaha TTR250 trail and enduro bikes!

I had a bit of a sort out of my stock of used swingarms yesterday and it is probably worth posting another bit of strong advice to save owners money and time down the line.

Check your chain slider - green plastic part that fits over the end of the swingarm near the front sprocket. It wears underneath so might be difficult to see without using a torch.

All but one of the swingarms had the slider worn through. This leaves the chain free to slap against the bearing cover and, once that is damaged, it allows water into the bearing and it's not long then before water gets in and kills that end of the bush and its bearing.

This is a photo from yesterday (not sure why it isn't in focus!) showing the consequences of water ingression on a swingarm bush - you can guess that the needle-roller bearings were equally knackered.

The chain sliders were binned before I thought to take some photos so here are some "library" pics from my archives.

The following photo shows how the slider wears and you need to check that your own slider sill has plenty of wear left in it.

This is what a new slider looks like (available here ) 

Rusted bearing:

If the slider isn't replaced it will wear through the bearing cap and start to chew on the swingarm itself:

Long-term owners will know this stuff but we have had quite a lot of new owners on here recently that may not be aware.

If you replace a worn slider in time then you will save yourself the messy and time-consuming job of replacing the swingarm bearings and bush 

If all else fails buy a new slider and swingarm bearing and seal kit from Steve!

Or if you swingarm is badly damaged then Steve also sells good refurbished swingarms - here and here.

Brian