Performance puzzle

[Robert Porter <drrebob@usnetway.com>]

I think I got it.  The spitting sputtering and backfiring that appeared only
after the engine had warmed up for 20-25 minutes was finally traced to a
worn distributor.  (Oddly enough it went away when the voltage regulator was
disconnected.)  With helpful suggestions from Bill Hatfield, John Brasfield
and Christian Schauff, plus a distributor rebuild kit from Rallye, the
gremlin went away, and the R16 performs better than ever.  Thanks guys.
 
Bob Porter
Harrisburg PA