Hi guys,
Trying to troubleshoot a problem. Hope someone here can help me.
2008 FE 550
I have a midrange miss/bog that just suddenly starting occurring both when accelerating and when backing off the throttle while trying to hold the bike at a constant speed (like when in steady one lane traffic. Originally it came on in a very slow way as just a very slight hiccup or engine surge when holding the bike at a constant speed in traffic. It wasn’t serious enough to even do anything about. Then all of a sudden one day coming home it just jumped to serious status to the point that its barely even rideable.
I pulled the carb off and methodically cleaned and examined all jets and passages within the carb and noticed nothing that stood out (following all the guidelines in the service manual). Put it back together with all the adjustment settings exactly where they were before.
Now with the carb cleaned out, its very hard to start, but when I do finally get it to start (usually with a tiny twist of throttle which never used to be needed before), it backfires like crazy at low and at midrange and doesn't want to idle at all. On top of that, the mid range miss/bog is still there. Once it climbs up into the main jet it seems to clear up and there seems to be power in acceleration from my limited testing.
I thought I incorrectly installed something in the carb so I pulled it apart and re-cleaned everything to rule that out. But both problems are still there second time around.
Intake boot looks new with no visual cracks and clamps are confirmed tight. I removed air filter to rule that out. Fresh fuel and filter is clean with full flow from tank valve in inlet hose on carb.
I have not changed the spark plug which I admit could be the culprit but living in northern Canada (Whitehorse), I can’t find a plug wrench or socket that fits between the camshaft housing. So if you strongly believe that this could be the issue, hold back those itchy fingers of yours until I can get my hands on a wrench that fits.
But if you have seen this before and don’t think it is the plug issue, I am open to any suggestions of where to go after the plug. I'm no mechanic but have a decent aptitude of understanding about how engines work.
Thanks in advance.
Trying to troubleshoot a problem. Hope someone here can help me.
2008 FE 550
I have a midrange miss/bog that just suddenly starting occurring both when accelerating and when backing off the throttle while trying to hold the bike at a constant speed (like when in steady one lane traffic. Originally it came on in a very slow way as just a very slight hiccup or engine surge when holding the bike at a constant speed in traffic. It wasn’t serious enough to even do anything about. Then all of a sudden one day coming home it just jumped to serious status to the point that its barely even rideable.
I pulled the carb off and methodically cleaned and examined all jets and passages within the carb and noticed nothing that stood out (following all the guidelines in the service manual). Put it back together with all the adjustment settings exactly where they were before.
Now with the carb cleaned out, its very hard to start, but when I do finally get it to start (usually with a tiny twist of throttle which never used to be needed before), it backfires like crazy at low and at midrange and doesn't want to idle at all. On top of that, the mid range miss/bog is still there. Once it climbs up into the main jet it seems to clear up and there seems to be power in acceleration from my limited testing.
I thought I incorrectly installed something in the carb so I pulled it apart and re-cleaned everything to rule that out. But both problems are still there second time around.
Intake boot looks new with no visual cracks and clamps are confirmed tight. I removed air filter to rule that out. Fresh fuel and filter is clean with full flow from tank valve in inlet hose on carb.
I have not changed the spark plug which I admit could be the culprit but living in northern Canada (Whitehorse), I can’t find a plug wrench or socket that fits between the camshaft housing. So if you strongly believe that this could be the issue, hold back those itchy fingers of yours until I can get my hands on a wrench that fits.
But if you have seen this before and don’t think it is the plug issue, I am open to any suggestions of where to go after the plug. I'm no mechanic but have a decent aptitude of understanding about how engines work.
Thanks in advance.
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