Great, Bob. Some progress there.
Points to ponder.
- It sounds rich to me, almost like the choke is partially engaged.
- Takes a lot of ignition energy to fire thru plug fouling.
- Once the plugs get fouled like that, they can't be trusted, and can throw off your tuning efforts. Low speeds, rich conditions, they'll never self clean.
- Clean plugs for this tuning task, perhaps higher heat range, perhaps the Iridiums to fire thru the gas. Clean/change whenever they get black.
- Your video and description in post #1 kinda reveals that the bike had/has an underlying carburetion condition that only now is being addressed. You mentioned that the seller worked on the carbs, and I can hear it skip down to single-cylinder firing.
- Once the throttles are opened beyond a certain amount, idle mix screw adjustments are ineffectual.
- Can't help but think that there's something fundamentally wrong with the carbs. Not obvious, easily overlooked. Wish I and some others here could look over your shoulder, more eyes to scrutinize subtle little details, like choke plunger fitment, pilot jet type/condition, air bleeds, ...etc.
- Deja-vu', huh? How 'bout a "carboholics" party?
- Just for fun, review posts #508 - ##526
http://www.xs650.com/threads/mailman’s-xs2-a-full-on-restoration.51520/page-26#post-546829
How many turns from fully closed are your idle stop screws?
Points to ponder.
- It sounds rich to me, almost like the choke is partially engaged.
- Takes a lot of ignition energy to fire thru plug fouling.
- Once the plugs get fouled like that, they can't be trusted, and can throw off your tuning efforts. Low speeds, rich conditions, they'll never self clean.
- Clean plugs for this tuning task, perhaps higher heat range, perhaps the Iridiums to fire thru the gas. Clean/change whenever they get black.
- Your video and description in post #1 kinda reveals that the bike had/has an underlying carburetion condition that only now is being addressed. You mentioned that the seller worked on the carbs, and I can hear it skip down to single-cylinder firing.
- Once the throttles are opened beyond a certain amount, idle mix screw adjustments are ineffectual.
- Can't help but think that there's something fundamentally wrong with the carbs. Not obvious, easily overlooked. Wish I and some others here could look over your shoulder, more eyes to scrutinize subtle little details, like choke plunger fitment, pilot jet type/condition, air bleeds, ...etc.
- Deja-vu', huh? How 'bout a "carboholics" party?
- Just for fun, review posts #508 - ##526
http://www.xs650.com/threads/mailman’s-xs2-a-full-on-restoration.51520/page-26#post-546829
How many turns from fully closed are your idle stop screws?