The cylinder head nuts may not have been tightened properly and could loosen, allowing coolant to foul the spark plug.
A fouled spark plug could cause the engine to stall at idle and possibly not restart, increasing the risk of a crash.
What to do
Yamaha will notify owners and dealers will replace the cylinder head gasket and tighten the cylinder head nuts, free of charge.
The recall is expected to begin May 29, 2020.
Owners may contact Yamaha customer service at (800) 962-7926. Yamaha's number for this recall is 990137.