Britbike forum Forums Thread Like Summary - Main bearing

Just starting to reassemble the race motor that had an unhappy ending. With all that happened, I thought it a good idea to replace the mains.
This motor is a 71 code EE. The bearing I took out from the left drive side was a C3 condition. Last night, I heated the case, got the old race out, dropped the new CN bearing into the race and left it all to cool. This morning, I found that the bearing will spin in the race, however, it will not come out of the race as every other bearing I've had will. Too tight.
What is the proper bearing for this particular motor? And possible consequences of running it?

Thanks

I'm pretty sure that a CN was spec'd for these motors. The race is shrunk into the case.
Even though I did not keep record of it, the fact that I removed a C3 (that I installed previously) tells me that I came up against this issue 4 years ago when I initially built this motor. It must have worked well as it was one of the mechanically quietest motors I've had. The old race shows a bit of wear where the rollers ran though nothing I can feel with fingers. I'm going to have it measured to satisfy curiosity.