- Joined
- Feb 21, 2019
- Messages
- 1,067
having a bit of carb issues (?) on the 74 Mk2. performance wise, when you're on it, pulls strong from idle to WOT - all gears. however, it kind of feels like i'm getting a bit of, or a slight misfire under steady state, speed / RPM and fixed throttle position. when backing off the throttle to full close position, i'm getting loud, excessive backfiring through the mufflers. it idles fine, starts easy, and does not seem to have any other issues. i've played around with the pilot circuit and nothing seems to help. one note - the LH plug appears to be clean, almost too clean, the RH plug has excessive black soot. fresh rebuild on the carbs. specs - 260 mains and .106 needle, clips middle position, 3.5 slides (both carbs). a bit of a noob here, and i'd like a little input before i tear into things. for some reason, i'm thinking i may have a weak coil that maybe breaking down or has intermittent problems, however i could be out in left field with that thinking. any ideas....
edit - ignition specs - new tri-spark and tri-spark MOSFET rectifier/regulator. new champion resistor plugs, new, straight copper core, HT leads.
edit - ignition specs - new tri-spark and tri-spark MOSFET rectifier/regulator. new champion resistor plugs, new, straight copper core, HT leads.
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