Outside Micrometers

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Can i reuse a motorcycle cylinder piston if chipped?

I have a 75 kawasaki 250 street bike, the pistons were seized up so i freed them. In the process I chipped a small piece off the bottom of the piston. It was a clean break. the chip is like the size of a small fly. so should I chance using it, or buy a new one?

1st I would measure the piston with an outside micrometer and then measure the inside of the cylinder to determine whether the piston to cylinder wall clearance is adequate.

If that is all good, then you should be able to polish out any rough edges the break created, so long as the piston hasn't been structurally compromised. Sharp edges will result in a crack and ultimately can lead to engine failure. From your description of the location of the chip it shouldn't be a problem structurally as long as you polish it out smooth.

You should also make sure the missing material from the piston won't affect the balance of the engine as well, by comparing the two pistons, rods, pins, and rings to each other to see if they weigh the same. If you are off by more then a gram or two, then it's time for new parts.

Discover Outside Micrometers On eBay Below:

Fowler Outside Micrometer Mechanical 0 1 0001 With Plastic Case
Fowler Outside Micrometer Mechanical 0 1 0001 With Plastic Case
$24.99
Mitutoyo 0 1 mm Digimatic Outside Micrometer
Mitutoyo 0 1 mm Digimatic Outside Micrometer
$125.00
ABS 4200 0164 0 4 OUTSIDE MICROMETER SET 4200 0164 4 PIECE SET
ABS 4200 0164 0 4 OUTSIDE MICROMETER SET 4200 0164 4 PIECE SET
$100.48
0 25mm Metric Inch External Outside Micrometers Measuring Calipers with Case
0 25mm Metric Inch External Outside Micrometers Measuring Calipers with Case
$50.62
NEW MITUTOYO 0 1 Quantumike DIGITAL IP65 Outside Micrometer 00005 Grad13P
NEW MITUTOYO 0 1 Quantumike DIGITAL IP65 Outside Micrometer 00005 Grad13P
$175.75
ALLIED INTERNATIONAL 4 5 OUTSIDE MICROMETER
ALLIED INTERNATIONAL 4 5 OUTSIDE MICROMETER
$40.00
NEW MITUTOYO 0 1 Quantumike DIGITAL IP65 Outside Micrometer 00005 Grad14P
NEW MITUTOYO 0 1 Quantumike DIGITAL IP65 Outside Micrometer 00005 Grad14P
$175.75
1 PCS Brand NEW Mitutoyo 102 301 Outside Micrometer 0 25mm 001mm
1 PCS Brand NEW Mitutoyo 102 301 Outside Micrometer 0 25mm 001mm
$78.00
Mitutoyo 103 126 Outside Micrometer 25mm 50mm Mic Metric Carbide Face
Mitutoyo 103 126 Outside Micrometer 25mm 50mm Mic Metric Carbide Face
$39.99
Mitutoyo 293 831 30 0 1 0001 Res Electronic Outside Micrometer
Mitutoyo 293 831 30 0 1 0001 Res Electronic Outside Micrometer
$112.50
MITUTOYO 103 226 OUTSIDE MICROMETER RATCHET STOP RANGE 11 12 MT102
MITUTOYO 103 226 OUTSIDE MICROMETER RATCHET STOP RANGE 11 12 MT102
$310.00
0001mm Electronic Digital Outside Micrometer 0 25mm Caliper Gauge Meter
0001mm Electronic Digital Outside Micrometer 0 25mm Caliper Gauge Meter
$50.62
1 PCS Brand NEW Mitutoyo 103 140 10 Outside micrometer 75 100mm 001mm
1 PCS Brand NEW Mitutoyo 103 140 10 Outside micrometer 75 100mm 001mm
$128.00
SHARS 0 6 6 Premium Outside Micrometer Set Solid Metal Frame 0001 Carbide Tip
SHARS 0 6 6 Premium Outside Micrometer Set Solid Metal Frame 0001 Carbide Tip
$98.00
NOS PAV Swiss 25 50mm Outside MICROMETER Grad 001mm Carbide Faces 2A411
NOS PAV Swiss 25 50mm Outside MICROMETER Grad 001mm Carbide Faces 2A411
$70.96
Mitutoyo 103 129 Outside Micrometer 0 25MM 0001MM New mn
Mitutoyo 103 129 Outside Micrometer 0 25MM 0001MM New mn
$89.68
New Mitutoyo Outside Micrometer M125 1 103 135 0 1 0001
New Mitutoyo Outside Micrometer M125 1 103 135 0 1 0001
$120.00
Mitutoyo Outside Micrometer NO 103 262 Baked Enamel Finish Ratchet Stop
Mitutoyo Outside Micrometer NO 103 262 Baked Enamel Finish Ratchet Stop
$44.99
MItutoyo 150 175mm 001mm 075mm tip Outside Blade Micrometer + Setting Standard
MItutoyo 150 175mm 001mm 075mm tip Outside Blade Micrometer + Setting Standard
$239.95
Mitutoyo 25 50mm 001mm 04mm tip Outside Blade Micrometer + Setting Standard
Mitutoyo 25 50mm 001mm 04mm tip Outside Blade Micrometer + Setting Standard
$147.95
MItutoyo 25 50mm 001mm 04mm tip Outside Blade Micrometer + Setting Standard
MItutoyo 25 50mm 001mm 04mm tip Outside Blade Micrometer + Setting Standard
$169.95
MItutoyo 25 50mm 001mm 075mm Thick Tip Outside Blade Micrometer + Standard
MItutoyo 25 50mm 001mm 075mm Thick Tip Outside Blade Micrometer + Standard
$169.95
MItutoyo 25 50mm 0001mm Digital LCD Outside Blade Micrometer 075mm tip
MItutoyo 25 50mm 0001mm Digital LCD Outside Blade Micrometer 075mm tip
$419.95
MItutoyo 50 75mm 0001mm Digital LCD Outside Blade Micrometer 075mm tip
MItutoyo 50 75mm 0001mm Digital LCD Outside Blade Micrometer 075mm tip
$379.95
Asimeto 101 02 2 25 50mm Precision Outside Micrometer
Asimeto 101 02 2 25 50mm Precision Outside Micrometer
$93.29
0 1 000005 Digital Electronic Outside Micrometer LCD Carbide Tip 0 25mm
0 1 000005 Digital Electronic Outside Micrometer LCD Carbide Tip 0 25mm
$51.28
NEW Kd Tools 3730 0 1 Outside Micrometer
NEW Kd Tools 3730 0 1 Outside Micrometer
$14.99
Premium Outside Micrometer Machinist Tool Set Round Frame 00001 Precision Vern
Premium Outside Micrometer Machinist Tool Set Round Frame 00001 Precision Vern
$180.93
Chicago Brand outside micrometer with box 0 1 x 00001  used
Chicago Brand outside micrometer with box 0 1 x 00001 used
$21.95
Mitutoyo 101 103 Outside Micrometer 0 25mm 001mm Graduation M210 25 FREE SHIPP
Mitutoyo 101 103 Outside Micrometer 0 25mm 001mm Graduation M210 25 FREE SHIPP
$44.00
Mitutoyo 101 104 Outside Micrometer 25 50mm 001mm Graduation MT005 1 M210 50
Mitutoyo 101 104 Outside Micrometer 25 50mm 001mm Graduation MT005 1 M210 50
$44.00
Mitutoyo Outside Blade Caliper Micrometer 125 150 mm w Standard 125 mm
Mitutoyo Outside Blade Caliper Micrometer 125 150 mm w Standard 125 mm
$295.00
Outside External Gauge Micrometer Standard Reading Machinist Measuring 0 1 inch
Outside External Gauge Micrometer Standard Reading Machinist Measuring 0 1 inch
$20.66
2 3 OUTSIDE MICROMETER
2 3 OUTSIDE MICROMETER
$8.00
Starrett T230XFL Outside Micrometer  Sets Type of Reading InchRange 0 1
Starrett T230XFL Outside Micrometer Sets Type of Reading InchRange 0 1
$233.99
STARRETT No 226 Outside Micrometer 2 to 3 Made in USA
STARRETT No 226 Outside Micrometer 2 to 3 Made in USA
$24.99
CHUAN BRAND OUTSIDE MICROMETER 5 6 RANGE 001 ACCURACY 12 71106
CHUAN BRAND OUTSIDE MICROMETER 5 6 RANGE 001 ACCURACY 12 71106
$51.99
UNKNOWN MFG OUTSIDE MICROMETER 6 7 RANGE 001 ACCURACY RATCHET STOP
UNKNOWN MFG OUTSIDE MICROMETER 6 7 RANGE 001 ACCURACY RATCHET STOP
$35.99
Fowler 52 222 666 6 Piece Mechanical Outside Micrometer Set  0 to 6 Range
Fowler 52 222 666 6 Piece Mechanical Outside Micrometer Set 0 to 6 Range
$239.95

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