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Old 05-04-2016, 07:03 PM
Munch Munch is offline
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Join Date: Apr 2016
Location: Wales, United Kingdom
Posts: 149
Default How to know if the bike is running lean?

Hello GG riders!

I purchased a gas gas ec 250 2006 a few days ago from a family member with a spluttering problem.

Basically it would start first kick every time but the bike would splutter very bad at anything more than 10-20% throttle, I solved this by running a hotter plug (br9) and changing the mixture from 40:1 to 50:1.

Now I am afraid the bike is running lean, I put a fresh plug in and took it for a test ride for approx 5 minutes and the plug was a very light colour, yellow/white colour which I believe means it is lean?

Is there some sort of trick to finding if it is lean? If it is lean how do I go about making it richer?

My settings:
Pilot: 42
Main: 172
Needle: #3
Needle type is "N1EF"
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