Steering head bearing info.

[Rick G]

Here is what I have , from the old forum:
Bearing measurements  By Kent Williams
 I have recorded some dimensions and lettering off my K & L steering head bearings before I put them in. I ahve heard ( as opposed to know) that many of these replacement bearings are not commonly available sizes, and that some are made from assembling the the cage from one bearing with the race from another. If true, the odd sizing is probably due to the fact that whe are placing roller bearings in a place designed for ball bearings.
upper : cage ID: 25mm                           Lower:  cage ID: 30mm
cage axial length:15mm                                     cage axial length: 15 mm              
cage marking:25Y                                              cage marking 30Y
race OD: 48 MM                                                 race: OD 48 mm                      
race axial length: ?                                            race axial length:9.5 mm
race marking:MCI 48 YS                                     race marking 48KS
Overall Assembly Axial length: 151 mm                overall assembled axial length: 15.15 mm

[Rick G]

That should read 15.1 mm on the upper overall asembled axial length.