DBR Johnson/Evinrude Sleeves
Port timing is the camshaft of a two-stroke. Please feel free to read the information in the technical section about port timing. At DBR, we have developed sleeves that work in the real world on fast boats. All sleeves are designed and built using CAD/CAM technology providing smooth ring transition across port openings. The sleeves are machined from the finest gray stress relieved cast iron available. We have spent years developing these porting specs and the results speak for themselves.
Custom sleeve designs are available. These are made in small quantities and are expensive. Please call if this is a choice you would like to make.
Custom sleeve designs are available. These are made in small quantities and are expensive. Please call if this is a choice you would like to make.
 Johnson/Evinrude 3.0 Liter Finger Port B-Spec Sleeve |
 Johnson/Evinrude 3.3 Liter B-Spec Sleeve |
