Andy wrote:The RHS bearing is a special 9-ball NTN bearing, and current availability is very much like the Koyos were back in the day... non-existent! As Daz says though, an NSR bearing can be used.

daz680 wrote:
My NF5 crank was rebuilt by SEP http://www.sep-kegworth.co.uk/page1.htm
There bloody slow but when i checked my crank after the rebuild it was well within tolerance for run out.

We had to (re)rebuild a client supplied NSR250 newly "rebuilt" crank from SEP as it was atrocious! Maybe it was a one-off, or had been dropped in transit, or they've just tightened their act up, but we certainly saw why the rebuild was cheap compared to GTPE at the time! Glad your NF5 crank was good.

I expect VHM are doing St. Neots' NF5 cranks.