Valve Rocker Arms

	On the top is a stock Honda rocker arm, on the bottom is a rocker that was lightened and polished. Note how metal was removed along the top arch of the rocker, the bottom below the pivot and how the adjuster section was tapered. The lightened rocker was modified and is courtesy of Ardjuna Racing Team in the Netherlands.
	Old rocker arm on the top, new one on the bottom. Note the small change in the new design. The left (valve) side of rocker has less thickness vertically. It appears to be smaller and somewhat lighter in design. I have modified the old rocker on top by grinding away some of the metal on the lower left side to provide more clearance for the larger titanium spring retainers and to prevent problems caused by recessed valve seats. The NEW rocker appears to have this change designed in already, probably so people that have had several valve jobs done will not have interference problems between the underside of the rocker and the spring retainer as the valve settles farther into the seat with each valve job. The rockers do not seem very prone to wear so if yours measure to within factory specs don't replace them. The rockers cost about $20 US a piece.
	The old rocker shaft on the left - 9.93mm diameter The new rocker shaft on the right - 9.96mm diameter. Wear limit spec is 9.91mm The old shaft on the left is from the trashed 1998 race motor. Surprisingly it is still within factory wear limits. I could note only very little difference in the "slop" between the old rocker and shaft, and the new rocker and shaft. I got new shafts and rockers just to be on the safe side. If your parts measure to within factory specs and have no ridges that you can feel with your fingers then I wouldn't worry about them. The shafts are about $5.00 US a piece.