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Old 09-30-2010, 03:13 AM   #14
diesel critter
Joined: Jan 2010
Location: wheatbelt western australia
Oddometer: 33
fuel air ratio, spark and/or valve timing can affect how hot the exaust gets. Even cast iron manifolds can glow red, they shouldn't, often its a timing problem, or perhaps in the case of some mcycles, the timing at idle isnt really what it should be for optimal idling, cuz thats not what motor bikes are for!
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