ngk spark plug rm 125

[rg1124563]

i have a 2004 rm 125 and the ngk plug that fits it is the R6918B-8 and it costs $20-$35 i was wondering if there are any other (cheaper) plugs that i could use

 

[kx125412]

BR9ES, BR9EG, BR9EGV or BR8 plugs. Just gap them correctly. The bres plug is just a standard plug, the breg is a race plug, and the bregv is a race plug with a thin tip insulator I believe