Aluminum & Fiber Friction Disks - Why?

[OakBehringer]

In at least the XS1B, XS2, and TX650, there are two types of friction disks in the clutch: aluminum (2) and fiber (4). The two aluminum disks are in the center of pack, with two fiber disks on either side. Why are there two different types? I have six NOS fiber disks. I'm guessing I really do need to find the aluminum disks. Just curious as to what the reason was for the different types.

Thanks,
Adam

 

[Grinder]

The dics are assembled one fiber/one metal and so on. The metal on metal would just slip and fiber on fiber would tear each other up. look at a parts breakdown for the year bike you have on one of the yamaha parts sites such as boats.net to get the assembly order.

 

[OakBehringer]

I'm not referring to the steel plates that go between each friction disk.

In (at least) the first three model-years of the 650 (71-73) there were actually two different types of friction disks: aluminum core and fiber core. Check it:

http://www.cmsnl.com/yamaha-tx650-1970-1973_model8374/partslist/B-09.html

 

[Grinder]

I see that they have two different part numbers for the friction discs...strange but true.

 

[OakBehringer]

In see that they have two different part numbers for the friction discs...strange but true.

Yeah man. Lame. Aluminum core and fibre core. Just noticed they're both superseded by the same part number. I wonder if that ended up as al core or fibre?

Posted via Mobile