Originally Posted by
motomatt
As far as O'donnell plugs, I found the 77T to give me a better idle and a few more RPM compared to the 97T. They DO seem to run best with the O.S. P3, but they have the shortest life of the plugs I have tried. I'll be trying the GO plugs this upcoming season.
Stick to the OD 77T. Alternatives are SH 7, and Hobao's P4