Triumph 350 500 T90 T100C T100R Timing-Side Crank Bush (1) 1957-68 PN# 70-4322


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SKU: TBS-CRANK-BUSH Categories: , Tag: OE Number: 70-4322, E4322Year: 1957-68Make: TriumphModel: 350, 500 Twins, T90, T100C, T100R


This bushing is important as it supports the timing-side crank journal and must be sized correctly to allow oil flow to the big-end journals. A worn crank bush will produce low oil pressure and can cause the rod bearings to seize on the journals.

This timing-side bushing is for Triumph part number 70-4322 and fits all Triumph 350 and 500 Unit Twins from 1957-1968. The bush is a steel-backed bronze plain bearing that is pressed into the timing-side crankcase. It is available in (3) undersizes to accommodate a machined crank journal.

The bush supports the timing-side main journal of the crankshaft and provides lubrication from the oil pump to the rod bearings. It is installed directly into the timing-side of the crankcase and is an interference fit.

Use the drop down menu to select what size bushing you need.

Please refer to your parts catalog for proper fitment.

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