YFZ450 question????????????

[motoxrider519]

Hey I dont want to sound stupid or anything but i just bought a yfz and I was cleaning it and I noticed that on the right side of engine (top end) there is a small hole. Im not sure if there is suppose to be a screw or something in there so if anyone can tell me anything about this i would appreciate it. Thanks

[5valves]

Its a drain hole for the spark plug opening in the head.

[motoxrider519]

oh.... thanks

[pred67]

5valves is right it is a drain hole for the sparkplug, but when you wash it it will usually get some water in there that won't come out so I usually spray some contact/ electrical cleaner in there to help dissapate the water.