Use a plug spanner to remove the spark plug. It is provided in the bike toolkit. Makes your job much easier and you will not end up damaging the plugs.

opened the pulgs but couldidnt figure out what's the color....

was washing my bike today..and while washing the exaust...noticed that ther are two rusted holes in it...then i hit the end can with my hand and found stuff to be rattling in it...it seems that i was confusing the clatter from the exaust for engine noise and pinging.

anyways i stuffed a cloth into the exaust and the noise/clatter is gone the bike seems normal again...i wanted to know if this will affect my economy..(which is already very low just 25 to 30ish)??...or could it affect the engine in any way??..or how much would a new exaust cost??

please help...