NGK spark plug guru

[bradlington1]

I would like to know from anyone who is familiar with the NGK racing spark plug in the KX125 1993 motocross bike.

The number is R6254K-105* .

I have tried various methods to get an equivalent but no-one can say for definate what plug I should be using .
Can someone let me know what they are using on their 1993 KX125 as this model and the 1992 were the only vintage that used this plug.

Thanks

Brad

 

[dezryder]

Wow...Google does work! Who'd a thunk it?

I would just go with anything you can readily find in the same heat range (105) and has the same reach and all. You should find the numbers you need here:

http://www.sparkplugs.com/sparkplug411.asp?kw=Complete+NGK+racing+plug+number+chart&mfid=0

Me, I use the 'KISS' theory and run NGK B8ES in everything. Only need one type of spare plug in my fanny pack that way. :nod:

 

[Moose]

Yeah, I just use B8ES in my bike. It's a 1994. Thought there'd be some similarity.

 

[FruDaddy]

From what I have seen, most 250's run 8's, 125's run 9's, and 65's use 10's. NGK used to have a PDF on their website that explained their numbering system in detail, but I cannot find it right now. It would make it easier to find a similar plug.