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Discussion Starter · #1 ·
I just put on a r4 full system I am running foam filter with no lid. I rejetted to a 170 main and 3 turn out on mixture. It seems to run great but shouldn't it be way rich. I am at 700feet and about 25-35 degrees right now. thanks
 

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Check the plug

You need to check your plug and check the color of it. I ran mine yesterday in 20 degrees and it is too lean with a 170, and is closer with a 175. I was going to try a 180.

Being that cold your going to get more air into the carb, so of course it will run leaner.

Hope this helps you.

Kevhead
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