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Old 04-07-2011, 05:26 AM   #27
Beastly Adventurer
Joined: Feb 2006
Location: Bath Uk
Oddometer: 2,343
When I took my r80 to 16000 ft in Peru, I fitted a smaller main jet and hotter plugs, I reset the idle at 8000 ft, bike ran ok but big loss of power due to reduction of O2. Body was ogish but v tired all on dirt roads. Snow at the top.

Object is to keep the mixture within reasonable operating parameters so it will start at altitude and to reduce fuel consumption.
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