Standard cylinder bore: 3.937″ (100mm) bore. 1st. ring: 1.2mm. 2nd ring: 1.2mmOil ring: 2.0mmStock replacement for 107″ models. Comes with a chrome top ring, a ductile iron Napier 2nd. ring and a chrome flex-vent 3-piece oil ring. Tech tip: Piston grooves vs piston rings. It’s not difficult to determine if a Hastings piston ring set will fit a certain piston. You should measure the height of the piston groove in the piston itself. The 2 top grooves will be for compression rings, the lower groove will be for the oil ring. In most cases Hastings oil rings are of the low tension 3-piece flex vent type. Ring heights are listed for reference. Tech tip: Piston oversizes. For each oversize cylinder diameter will increase with .010″ (0.254mm). The standard bore of the cylinder is listed for reference. (Information provided by Hastings Manufacturing Company, Inc.)
- Category: Piston rings
- Manufacturer part number: 2C5231005
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