Checking plugs
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Joined: Oct 2005
Posts: 81
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From: Port St. Lucie, FL.
Checking plugs
This question maybe irrelevant in the these day's of fuel injection. Back in the day when we had done a jet change in the carburetor or changed out the mufflers, we would take the bike out on the road and ride at about 60 mph for a few miles, hit the kill switch pull off the side of the roadway and pull a plug and check out the color. Using this system we would have a pretty good idea if the bike was running rich or lean. Today with on the talk of slip-ons running lean requiring a stage one or two. It seems to me that if the old system was still workable it might end some of the guessing out of just adding slip-ons. After installing a K & N 1717 air filter I used that system and checked the plugs, they looked normal in color. Thanks in advance
Cruiser
Joined: Apr 2013
Posts: 203
Likes: 36
From: Eastern PA
I remember a friend of mine doing a plug check that way back in the 80s. No clue if it works on M8. Besides, I think you have to remove the fuel tank on an M8 model to get to the plugs so I don't think it is something you can do on the side of the road.
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Joined: Sep 2009
Posts: 17,138
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From: SE Michigan
This question maybe irrelevant in the these day's of fuel injection. Back in the day when we had done a jet change in the carburetor or changed out the mufflers, we would take the bike out on the road and ride at about 60 mph for a few miles, hit the kill switch pull off the side of the roadway and pull a plug and check out the color. Using this system we would have a pretty good idea if the bike was running rich or lean. Today with on the talk of slip-ons running lean requiring a stage one or two. It seems to me that if the old system was still workable it might end some of the guessing out of just adding slip-ons. After installing a K & N 1717 air filter I used that system and checked the plugs, they looked normal in color. Thanks in advance
Agree. Change every 20K I think is interval in the owners manual
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Joined: Jan 2008
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From: State of Confusion
This question maybe irrelevant in the these day's of fuel injection. Back in the day when we had done a jet change in the carburetor or changed out the mufflers, we would take the bike out on the road and ride at about 60 mph for a few miles, hit the kill switch pull off the side of the roadway and pull a plug and check out the color. Using this system we would have a pretty good idea if the bike was running rich or lean. Today with on the talk of slip-ons running lean requiring a stage one or two. It seems to me that if the old system was still workable it might end some of the guessing out of just adding slip-ons. After installing a K & N 1717 air filter I used that system and checked the plugs, they looked normal in color. Thanks in advance
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