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Old 02-03-2007, 06:48 AM   #1
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Default 12TZ(P)傍 (3-Port) Tuning

Just bought myself a 12 TZ and there are no factory needle settings in the manual. What are the benchmark settings for these.?. Are these tuned from the factory for running in?? Going to run 16% with standard head shims

What is the best run-in method for these?

Thankx
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Old 02-03-2007, 06:58 AM   #2
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Low end needle - Head of screw should be flush with the carb body
Middle needle - don't touch it!
High end - Between 2 and 1 3/4 out

I broke mine in with the high end at 2 out so it ran a little rich, once it broke in my settings did not change to much from this. My high end is a little leaner right now, just depends on the weather for that day. Hope this helps, the settings are in the manual, just look harder or go to the OS website
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Old 02-03-2007, 07:00 AM   #3
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Engine break in? Ive heard a few different opinions on that and its hard to know which one to follow.
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Old 02-03-2007, 07:29 AM   #4
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k.. thanks for the info.. i have realised that i have only printed the 1st 15 pages out of 56... cheers..
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Old 02-03-2007, 11:21 AM   #5
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Go to the O.S. Engines Web site and download it.

http://www.osengines.com/
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