They recommend a certain pre-mix, fork oil and chain lube but I dont follow that either :-)
They also say you can run 90 Octane pump gas (barf) ya right , hehee
My big manual from Suzuki manual recommends the R6918B-8
http://www.ngk.com/results_appOther.asp?otherMotiveID=30958&mfid=1
might have to click this link 2 times, the first time OK'ing that if you use the wrong plug you could blow up your motor, haha, YIKES !!!)
Seems to be a nice fancy hand made plug. When searching this plug on a NGK's site they say it is for 1996-2003 RM125's concidered to be the "ultimate class".
When cross referencing that size plugs thread, gasket reach ect I came up with this.
http://www.sparkplugs.com/search_ch...stor=&manufacturerID=&action.x=62&action.y=10
(Might have to click this link 2 times, the first time OK'ing that if you use the wrong plug you could blow up your motor, haha, YIKES !!!)
You can even narrow it down more by hex size, resistor, ect ...
If you have something that says to use a BP7ES, the 8 heat range series of that plug says only $2.24
Id save the extra $20 and go that route maybe.