I pulled my dirt bike out of the garage to wash it today. I pluged the exhaust with a bag to not allow water to get into it. After i washed it i started it without realizing the bag was still there. In was on for about 30 seconds and it sounded weak. After it shut off i realized the bag was there. I took out the bag and tried to start it. It wouldnt start. After about 10 min of kick starting it i decided to change the plug. After i did that it started right up, but the plug didnt look bad. I want to know if i did any harm to the motor? This happened to my Suzuki Rm 85L.

 

you probably didn't hurt anything, if it ran normal after you got it started back up I wouldn't worry about it.

 

All it will of done is suffocate the engine as it will not of been able to get any frst air in. Only way I cant think of it harming an engine is if there is some turbo been run where the intake pressure is high, 2 strokes just use the vaccuum to draw the fuel/air so no i doubt anything has happened