Pistons-Fitting

Pistons are available for service in standard size and oversize.
The standard size pistons are color-coded red, blue or yellow on the dome.
Measure the cylinder bore and select the piston to ensure the proper clearance. When the bore diameter is in the lower one-third of the specified range, use a red piston. When the bore diameter is in the middle one-third, use a blue piston. When the bore diameter is in the upper one-third, use a yellow piston.