30-07-15, 09:04 PM
I ran my Fazer on the same set of normal plugs for 50k miles. Made no difference putting iridiums in that I could tell. Might do on poor fuel, might do in very high performance machines, but I don't think the Fazer needs them.


![[Image: 125377.png]](http://mefi.us/images/fuelly/smallsig-uk/125377.png)