Does anyone know what the compression should be on a stock 2000 400ex? I am looking at one to buy and would like to check the plug and compression tonight when I look at it,also is there anything in particular that I should be looking at? thanks for any info!!

 

I think it is somwhere around 9:3 ratio. look everywhere very closely on it. I got my 2000 and it is a sweet machine, it too, is stock.