gimphand
05-23-2008, 09:25 AM
I have a 400ex, full pipe, K/n Filter no lid, NGK 8 plug, just bored to a 416 with xr400 gasket. Now that I put this back together with new piston should I rejet? I put a new plug in I had laying around and it was an 8, the old one was a 9. Ran it for about 15 minutes and the plug is had some white ash?