For models with long connecting rod.
These pistons are classified.
Check the marking on your cylinder which classification you should have.
Classification table:
A = 38,945mm
B = 38,950mm
C = 38,955mm
D = 38,960mm
E = 38,965mm
F = 38,970mm
The product fits
Zündapp
441 C50 Super (266/278, 3-vxl.)
442 (248, Automatic)
446 ZD
448 CS50 (280, 4-speed)
448 CX50 (280, 4-speed)
510 Sport Combinette (267, 3-speed)
517 KS50 (278, 3-speed) (SE) 529 KS50 (278, 3-speed) (SE)) (SE)
529 KS50 (278, 3-speed) (SE)
540 KS50 (278, 3g) (SE)
561 R50/RS50
Engine 247
Engine 276. 4-speed
Engine 278. 3-speed
Engine 284. 5-speed