ok my warrior was run with only 3/4 quart oil for a lil then we changed it to 10w40 and i also changed the plug as well now it hass a knock at idle and seems slower than before not much but a lil slower wat could have happened also it runs good and starts good so i dont think the rings r worn or nothing of that matter but wat could be the knock

 

valves most likely.. and there's more oil now.. so it's prolly more drag.. so ya..

 

i thought it might be the plug but it isnt its still knocking i can only hear it at idle and low throttle but its quite annoying knowing its not right also y would more oil make it slower

 

drag ... also maybe there's TO much oil..