Anyone know what plug you're supposed to run in a new rm125? A buddy's brother just picked one up and said his bro spent $25 on a plug from the dealer. He said it was some special kind of plug???? My plugs cost $2.10 so I'm cornfused.
they are fitted to resist detonation that can occur, if the bikes detonated slightly a std plug breaks the ground stap and all hell brakes loose, i had it happen on a 03 kx125-very expensive, i now use the expensive plug.