Other Yamaha and Skat Trak Mag Pump rebuild parts numbers bearings, seals.

[OCD Solutions]

Here are the parts numbers for rebuilding your Yamaha or Skat-Trak Magnum pumps,

OEM 144mm Yamaha Superjet/Blaster Pump and 140/144mm Skat non-setback pumps
Bearing (2):Koyo 6205 or Koyo 6205-2RS for sealed bearing
Double lip seal (1): FP17 24.9 42 9.5 (Yamaha part number 93102-25M34)
Single lip seal (1): B11 S 24.9 42 6 (Yamaha part number 93101-25M50)


OEM 144mm Yamaha GP760/800 Pump and 140/144mm Skat setback pumps
Bearing (1):Koyo 6205 (or Koyo 6205-2RS for sealed bearing)
Bearing (1):Koyo 5205 (or Koyo 5205-2RS for sealed bearing)
*Utilizes same seals as above.

**I will add o-ring and seal sizes later.

 

[tricky1]

The mags use the same bearings unless its a setback, and then it will take 1-6205 and 1-5205 and the same seals posted above

 

[OCD Solutions]

You are correct Tricky. I pulled the bearings and found them the same as the stock superjet.

Interesting that the setback pumps use 2 different bearings. The GP couches use the same 2 bearings, same outside dia. but smaller inside dia.

 

[JetManiac]

All of the pumps use open/non shielded bearings, only midshaft uses the shielded 'sealed' bearing

 

[OCD Solutions]

Thanks Chris, i have one of the part numbers wrong on the GP pump as well, is the one bearing suppposed to be a 5204 or a 6204?