racingrider
Registered
I am new here but I thought I'd tell you what I know. Last year the tree's were on .400 lights(usually considered Pro Tree) or .500 light(typically anything else). This year NHRA (National Hot Rod Assoc.) switched over to .000 as a perfect light. The tracks that are IHRA (International Hot Rod Assoc.) sanctioned as far as I know are still using the old .400 and .500 tree's. There are still some NHRA tracks using the old system. I hope I have been of some help. I am new here and I used to ride a TL1000R that I totaled and I'm looking for a "Mighty Busa" right now. Thanks