Sorry to bring up this question about resistor spark plugs. I did a search and read all the posts about resistor plugs and it reminds me a little of the on going debate about oil mixing ratios. Anyway, I have a 01 YZ250 and went to the Yamaha shop to get some parts and a new spark plug. I requested a BR8EG and he gave me a B8EG. I said wait a second my owners manual bike specs requires the resistor plug. The parts guy tells me don't need it and don't worry about it! Any chance someone has given USA Yamaha a call about resistor plugs in their dirtbikes?