Roller cage. Measurements: 10x14x13 mm. To improve operation, starting from serial number no. X 29 583 702 the support of the crank pin and that of the piston pin have been increased (previous pin Ø 14 mm, new pin Ø 15 mm). The modification of these supports requires the adaptation of the crankshaft, its crankcase, the connecting rod, the piston, the piston pin, the Seeger rings and the needle cage. Individual parts of the previous crank mechanism are not interchangeable with parts of the new one. Models: 028 028 Q 028 W 028 WB 029 031 032 AV 032 AVE 032 AVEQ 032 AVEQW 032 AVEQZ 032 AVEW 032 AVEZ 032 AVQ 034 034 AVEQ 034 AVEQW 034 AVEQWZ 034 AVEQZ 034 AVEQZ-FD 034 AVSEQ 034 AVSEQN 034 AVSEQW 034 AVSEQWN 034 AVSEQWZ 034 AVSEQZ 034 S 034 Z 034 Z FB 036 036 Arctic 036 BR 036 Pro 036 QS 036 W 036 WVH 039 041 AVEQ 041 AVFBQ 041 AVQ 041 AVSEQ 041 FB 041 G 044 044 C 044 R 044 W BR 106 BT 106 FR 106 FR 108 FR 135 SEA FR 145 SEA FR 220 FS 106 FS 108 FS 160 FS 180 FS 20 FS 220 FS 220 K FS 280 FS 280 K FS 290 FS 360 FS 410 (4110) FS 420 FS 500 FS 550 FS 550-L FS 90 - 4117 FS 96 MS 290 MS 290-Z MS 310 MS 310-Z MS 340 MS 340 Z MS 360 MS 360 Arctic MS 360 BR MS 360 C MS 360 Pro MS 360 W MS 360 WVH MS 390 MS 390-Z TS 400