- Joined
- Jul 8, 2011
- Messages
- 19
Greetings,
This post concerns is my '73 850 Interstate.
I bought it in 1974 and have clocked about 12,000 miles of easy riding. The ignition system is fired by Boyer. I pulled the plugs and found the right side shows a light, even coating of dry, black soot. The left plug is exceptionally clean with only a very slight tinge of black on all surfaces (center porcelain is off white).
This plug condition has always been typical since I've owned the machine. I've used a few various plug types over the decades. I did search this forum for prior discussion but with no reference to a single plug foul. I've replaced both exhaust pipes twice in the past and recall the right side with a deeper blue color than the left side. Currently the newer pipes are quite good showing an even, medium straw coloration.
I'm simply looking for opinions on what I might do to make the right side fire as well as the left side does. My first guess is the throttle needle position on the right carb slide is set too rich.
It starts good and runs good but I'm still concerned.
Thanks for any help,
Dave
This post concerns is my '73 850 Interstate.
I bought it in 1974 and have clocked about 12,000 miles of easy riding. The ignition system is fired by Boyer. I pulled the plugs and found the right side shows a light, even coating of dry, black soot. The left plug is exceptionally clean with only a very slight tinge of black on all surfaces (center porcelain is off white).
This plug condition has always been typical since I've owned the machine. I've used a few various plug types over the decades. I did search this forum for prior discussion but with no reference to a single plug foul. I've replaced both exhaust pipes twice in the past and recall the right side with a deeper blue color than the left side. Currently the newer pipes are quite good showing an even, medium straw coloration.
I'm simply looking for opinions on what I might do to make the right side fire as well as the left side does. My first guess is the throttle needle position on the right carb slide is set too rich.
It starts good and runs good but I'm still concerned.
Thanks for any help,
Dave