national425ex
03-16-2008, 08:26 AM
Looking for a good starting point in jetting my 400ex. It is a fully built TC National 425cc motor. TC Shorty Exhaust, Open airbox. and a 450r carb. I have been using the factory carb and it is bogging it down alot. So Im going to switch to a 450r carb. What would be a good starting point on jets?