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Old 06-05-2010, 09:06 PM
wildemere wildemere is offline
Motorized Bicycle Elite Member
Join Date: Feb 2008
Location: Newcastle
Posts: 269
Default Re: Still having heat problems :(

A nicely tuned HT will run at ~180C when WOT up a hill.

The pipe 1" from the head is about 10C hotter.

When lean expect 10C more & 10C less when rich.

When lean the pipe gets 25C or more hotter, the opposite when rich.

Idle temps are 30 to 50C less.

I use a non-contact thermometer for initial tuning as it saves pulling the plug over and over, saving the threads.

The head & pipe needs to be painted black where measuring and the readings are taken next to the plug. My numbers are at sea level and 20 to 25C ambient.
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