shenion
Tool Pack Rat
- Messages
- 7,586
- Location
- Stone Mountain, GA USA
Have never seen this.
Was driving to work on my '83 GPz550 back in Sept. Sitting at a light it backfired. Restarted and it ran like crap. Felt i knew what it was and drove on. Got to work and confirmed a vacuum plug blew off. They were getting old and hard.
Kludged up a plug and drove home. Still on 3 cyl. Figured plugged carb caused initial problem and backfire.
Cyl #3 blew off the plug.
Cleaned carbs and no diff. Pulled plug wires one at a time and #2 made no difference.
Pulled plug and it had a gap of 0.000". No mark on the bar as if it had been hit.
Re-gapped and now runs fine.
Have never seen a plug fail like that. Might have expected it on #3 as that was running lean.
Just wondering if anyone has seen a similar failure.
I guess the plugs are near 10-years old. Could be metal fatigue. Still look like new (cleaned every year in bead blaster.)
Was driving to work on my '83 GPz550 back in Sept. Sitting at a light it backfired. Restarted and it ran like crap. Felt i knew what it was and drove on. Got to work and confirmed a vacuum plug blew off. They were getting old and hard.
Kludged up a plug and drove home. Still on 3 cyl. Figured plugged carb caused initial problem and backfire.
Cyl #3 blew off the plug.
Cleaned carbs and no diff. Pulled plug wires one at a time and #2 made no difference.
Pulled plug and it had a gap of 0.000". No mark on the bar as if it had been hit.
Re-gapped and now runs fine.
Have never seen a plug fail like that. Might have expected it on #3 as that was running lean.
Just wondering if anyone has seen a similar failure.
I guess the plugs are near 10-years old. Could be metal fatigue. Still look like new (cleaned every year in bead blaster.)