DonRed7
Well-known member
For the last week or so cold starts are not having the motor sound as smooth and it will seem as though the bike either misses a cylinder once or twice (engine stumbles i guess is the best description). Also the level of bar vibration has been increasing to the point where today for the first time i realized that my right hand was numb....So after a 45 min spin this morning i checked the header temps (bike still running, up on center stand) pointing my infra-red thermometer at each of the four headers and was suprised at the differences.
Cyl #1 = 81/82 deg C
Cyl #2 = 81/82 deg C
Cyl #3 = 90/91 deg C
Cyl #4 = 65/66 deg C
This was not just a quick click of the meter,...I did each pipe 5 or 6 times and from both sides or the bike,....(And,.... Yes i know IR Temp units are sensitive to surface finishes) and consistently got the above #'s.
Anyhoo,....Is this telling me that i'm having cyl's 3 and 4 running rich/lean?, and does a lean cylinder/pipe typically run hotter or cooler?
I also did this to each pipe at cold start up and my main observation was that cylinder/header #4 was warming up 10 to 15 degrees cooler than the other 3 pipes.
Any ideas?????
Cheers
-Don
Cyl #1 = 81/82 deg C
Cyl #2 = 81/82 deg C
Cyl #3 = 90/91 deg C
Cyl #4 = 65/66 deg C
This was not just a quick click of the meter,...I did each pipe 5 or 6 times and from both sides or the bike,....(And,.... Yes i know IR Temp units are sensitive to surface finishes) and consistently got the above #'s.
Anyhoo,....Is this telling me that i'm having cyl's 3 and 4 running rich/lean?, and does a lean cylinder/pipe typically run hotter or cooler?
I also did this to each pipe at cold start up and my main observation was that cylinder/header #4 was warming up 10 to 15 degrees cooler than the other 3 pipes.
Any ideas?????
Cheers
-Don