Cylinder head temps
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Road Master
Joined: Sep 2007
Posts: 963
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From: Displaced hillbilly
Well I picked up a couple new O2 sensors today and installed them in the bike. After letting it warm up and a quick spin around the neighborhood, the rear one seems to be fluctuating a bit better than the old one. By all accounts I guess they were due to be replaced as everything I could find on oxygen sensors said the two wire ones should be replaced every 30,000 to 50,000 miles. Ill have to keep an eye on the temps and see if that fixes the issue, but in just that little bit of time riding the two cylinders were only about 20-30 degrees apart.
Stellar HDF Member
Joined: Jun 2007
Posts: 2,928
Likes: 117
From: Ashby, Ma
Well I picked up a couple new O2 sensors today and installed them in the bike. After letting it warm up and a quick spin around the neighborhood, the rear one seems to be fluctuating a bit better than the old one. By all accounts I guess they were due to be replaced as everything I could find on oxygen sensors said the two wire ones should be replaced every 30,000 to 50,000 miles. Ill have to keep an eye on the temps and see if that fixes the issue, but in just that little bit of time riding the two cylinders were only about 20-30 degrees apart.
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Road Master
Joined: Sep 2007
Posts: 963
Likes: 145
From: Displaced hillbilly
Well it seems the fix was the new O2 sensors. Noticeable difference in heat at stops now. For some reason that old rear sensor would only give a signal that it was running rich and the ECM must have just kept trying to lean it out creating all that extra heat. Even at a stop it would show .9. Now at a stop both sensors show 0.0 and it seems much cooler.
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