Re: what are these two nubs on the seat rube
They were there to mount a water bottle or an air pump. Remove the Allen head bolts and either mount the engine over the threaded insert or grind off the protruding portion.
Keep in mind that you want as much metal to metal contact as you can get in the mount where it attaches to the bike frame.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"
Last edited by 2door; 02-17-2014 at 07:48 PM.