Needle Roller Bearing and Oil Feed Conversion

SRM have pioneered and developed this conversion for both the A10 and A65. BSA were aware of the shortcomings of the crankshaft bush and were beginning to develop their own crank oil feed conversions mainly for use with their racing engines.

Our needle roller and oil end feed conversion completely eliminates the troublesome timing side bush. This is replaced by a combined ball and needle roller bearing which withstands substantial radial and axial load, the combined bearing eliminates end float, it locks the crankshaft to the timing side so no more shimming!
The oil ways are altered and re-routed so the oil is fed directly from the oil pump to the big ends (via an oil seal housed in the timing casings) and through an end feed quill situated in the end of the crankshaft. Oil pressure and delivery to the big ends is uprated by at least 40 %.
Early Triumph 3TA 5TA`s etc using a similar bush can be converted in this way also, to give long reliable mileage.

In order for us to carry out the Needle Roller Bearing conversion we need you to supply all the following parts. Please ensure that all parts have been cleaned prior to posting.

1. Crankshaft
2. Both crank case halves
3. Inner and outer timing covers
4. Oil pump
5. Idler pinion gear
6. Crank shaft pinion gear
7. Oil pressure release valve
8. Left Hand Crank Lock nut (A7/A10)

  These are the latest price guides for the BSA A7/A10, A50,A65 models and Triumph 3TA,5TA models.

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