Piston Types and Descriptions
| XR70R Honda OEM | 72 cc 6v Aftermarket | 72cc 6v Honda OEM | 50cc 6v Honda OEM | XR50 12v HondaOEM |
| 66 grams | 74 grams | 88 grams | 60 grams | 50 grams |
| pin 13mm | pin 13mm | pin 13mm | pin 13mm | pin 13mm |
| 17.5mm height | 20.75mm height | 20.75mm height | 24.5mm height | 18mm height |
| Bore 47mm | Bore 47mm | Bore 47mm | Bore 39mm | Bore 39mm |
In the chart above "height" refers to "compression height" the
distance between the center line of the piston pin and
top outer edge of the piston. It does not include any of the "dome"
