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Author Topic: Dolmar 7900 piston choices  (Read 10052 times)

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Re: Dolmar 7900 piston choices
« Reply #40 on: August 16, 2012, 06:50:23 pm »
What is the old 7900 skirts and new lighter replacement 7900 skirt widths?  Top of pin hole to crown height?

Found your spec info Ed. 

Quote from: EHP on August 16, 2012, 05:56:48 pm

7900  piston with ring it weighs 85.4 grams , skirt width of 32mm/ 1.260 inch

52mm wide skirt wiseco piston, with ring it weighs 79.7 grams and has a skirt width of 1.670 /42.5mm

stock 272 piston weight was 82.9 grams with ring , skirt width is 35.83mm/1.414 inch,


Just trying to compare to a 52mm mahle piston I pulled out of another saw.



272 comparing too.

Height 40.5mm
Pin 12mm x 33mm x 8mm
Pin hole top to top of Piston 18mm


BB7900 specs
 
Height 40mm
Pin 12mm x 7mm x 32mm
Pin hole top to top of Piston 13.25mm
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