Single row ball bearing. Fitted to timing side Model 30/40 (International) SOHC engines, in correct RHP C3 (loose tolerence) type, from top quality manufacturer. Now obsolete and extremely difficult to source
Feb 21 Update: Like all original RHP main bearings, these are now obsolete and are not likely to be available again once current stocks have gone (I know, as we have consulted with RHP and cost for their minimum batch run for making the correct C3 type is prohibitive).
We have managed to source one last small batch of original new RHP C3 tolerance bearings - listed here, but once this batch has sold there may be no further stocks available.
However, we may be able to obtain 'Standard' tolerance (i.e. Non-C3) type in the future.
Timing Side SOHC Bearing - Background Information: The aluminium crankcase SOHC version (i.e. CS1/CJ or Model 30/40 International) all used this single row ball bearing on the timing side. However, magnesium crankcase M30/M40 and later Manx (both SOHC and DOHC) adopted a twin row ball bearing on the timing side - giving additional strength and rigidity and a fractionally narrower crankshaft. Therefore before ordering these bearings - confirm that your SOHC engine is aluminium crankcase version. If you have a magnesium crankcase version (i.e. M30/M40 Racing International or Manx) then you will require the twin row bearing which we also supply - Item 0021.
Obviously, the twin row bearing is not interchangeable with the single row type (and actually is still occasionally being made - so is actually cheaper on our catalog than the single row shown here, even though it is bigger - sorry!).