Hi,

i own a 1999 yamaha banshee and i was changing the plugs today (first time since i bought it) and i noticed that both plugs had black liquid on the tips. the quad is bone stock and has never had a rebuild. My question is this : Is this oil? is it somthing i should be worried about? i got a book from the library that said an oil fouled plug is caused due to worn rings and pistons. DO i need a rebuild? would it be possible for me to buy a shop manuel and do the work myself? how much $$ will it cost?

if you can help me with any of these questions it would be greatly appreciated. Thanx

 

tips.. as far as where the cap is on the plug.. or the end in the head?

 

the black stuff was on the insulator shell...so the part in the head...

 

btw..i changed both plugs and it was on both....

 

using 87-93 and premix it will have that black oily substnace( gas and oil mostly) if u run 100LL it won't have that

 

alright thanks alot...i was really worried...