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Old Book
by Morganmike - 21/09/26 07:54 PM
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Forums39
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Jun 14th, 2026
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Joined: Oct 2007
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OP
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Based upon the exhaust pipe coloration, I now have the left hand cylinder running much hotter than the right. Has anyone else experienced this? Cause?
Lance
1981 Plus 8
2016 Three Wheeler
2022 Corvette Stingray Convertible z51
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Joined: Feb 2018
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It would be good to use an infrared gun or temperature probe to verify and quantify the temperature difference before getting too worried.
Steve
Late 2012 M3W
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Typical of running too a lean mixture. Remove spark plugs and compare colours. Lean will be showing whitish deposits. If confirmed, could be faulty injectors? BUT, I know nothing really about M3Ws in particular.
Doug
2011 Plus 4 in Rich Maroon
1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900
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I found the the Right Hand Cylinder (the rear cylinder) always runs hotter. Possibly something to do with the motorcycle original configuration of the motor wanting the rear cylinder to run more rich because it is in the heat shadow of the front cylinder?
2019 M3W Sold and is now in Las Vegas enjoying the showgirls :-)
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I found the the Right Hand Cylinder (the rear cylinder) always runs hotter. Possibly something to do with the motorcycle original configuration of the motor wanting the rear cylinder to run more rich because it is in the heat shadow of the front cylinder?
Does anyone make a conversion kit to mount the X-Wedge engine sideways on the M3W to compensate for the originally intended configuration? 
Craig - Texas, USA
2026 Plus Four
2021 M3W
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Thats what MMC does, in theory.
2019 M3W Sold and is now in Las Vegas enjoying the showgirls :-)
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Looks to be about 100 degrees F hotter. On the left cyl
Lance
1981 Plus 8
2016 Three Wheeler
2022 Corvette Stingray Convertible z51
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Looks to be about 100 degrees F hotter. On the left cyl How and where did you measure it? ProTune readings?
2019 M3W Sold and is now in Las Vegas enjoying the showgirls :-)
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Measured at the exhaust pipe before the muffler. Noticed that one pipe was getting very discolored after a short ride the other was staying shiny.
Lance
1981 Plus 8
2016 Three Wheeler
2022 Corvette Stingray Convertible z51
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Joined: Feb 2019
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Mine did that too. My rear cylinder (left side facing motor) has always run cooler.
2019 M3W Sold and is now in Las Vegas enjoying the showgirls :-)
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