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Yamaha NOS 1A1-11638-00-00 4th Oversize piston for 76-78 RD400:
$45.00
11-J
Part number 1A1-11638-00-00 is an OEM Yamaha 4th Oversize (+1.00mm / 1.00 O/S) Piston.
It fits the following Yamaha RD400 models:
1976 Yamaha RD400C
1977 Yamaha RD400D
1978 Yamaha RD400E
(Note: This part number is for the piston only. Piston rings, wrist pin, and circlips are sold separately.)
