xs jimmy
XS650 Member
I have replaced the points ignition on my 1972 XS650 with Pamco Kit #14-0905 from Mikes.
Prior to installation, the following items were checked/adjusted:
cam chain tension
valve lash
timing
new spark plugs BP7ES gapped at .028 inch
idle mix adjustment
new battery at 12.66 volts
fuel enrichment operation
Prior to replacement the bike always started on first kick with throttle at idle stops, 1000 rpm, and ran well. Plugs a light tan color with a full ring of soot at the base of the porcelain.
No further adjustments were made prior to Pamco installation.
Installation of Pamco unit was by instructions from Mikes and Pamco website and had no problems. An existing frame ground was used under the original coil mount bracket.
When I finally got the bike started, I timed ignition between the 'F' marks with a strobe that only seemed to work on the right cylinder. The left cylinder would show both timing marks, about 4 degrees apart and would also indicate misses, although I didn't hear signs of missing.
The bike starts extremely hard, a dozen or so kicks, with backfiring through the carbs and occasional kickback on the kick lever. It rarely fires at all on the throttle stops and requires about 1/4 throttle to get it to fire. When it does start, it runs beautifully, with a smoother idle and a noticeable lack of vibration through 4500 rpm. I have double checked timing and have played a little with the idle mix screws with no results. I have about 100 miles on it with no problems except the hard starting.
Have any ideas on my hard starting issue.
I appreciate all your time and expertise as a new member.
Thanks.
Prior to installation, the following items were checked/adjusted:
cam chain tension
valve lash
timing
new spark plugs BP7ES gapped at .028 inch
idle mix adjustment
new battery at 12.66 volts
fuel enrichment operation
Prior to replacement the bike always started on first kick with throttle at idle stops, 1000 rpm, and ran well. Plugs a light tan color with a full ring of soot at the base of the porcelain.
No further adjustments were made prior to Pamco installation.
Installation of Pamco unit was by instructions from Mikes and Pamco website and had no problems. An existing frame ground was used under the original coil mount bracket.
When I finally got the bike started, I timed ignition between the 'F' marks with a strobe that only seemed to work on the right cylinder. The left cylinder would show both timing marks, about 4 degrees apart and would also indicate misses, although I didn't hear signs of missing.
The bike starts extremely hard, a dozen or so kicks, with backfiring through the carbs and occasional kickback on the kick lever. It rarely fires at all on the throttle stops and requires about 1/4 throttle to get it to fire. When it does start, it runs beautifully, with a smoother idle and a noticeable lack of vibration through 4500 rpm. I have double checked timing and have played a little with the idle mix screws with no results. I have about 100 miles on it with no problems except the hard starting.
Have any ideas on my hard starting issue.
I appreciate all your time and expertise as a new member.
Thanks.