Author Topic: 2019 SER 300 Factory jetting  (Read 15983 times)

bandicoot

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Re: 2019 SER 300 Factory jetting
« Reply #120 on: April 08, 2020, 04:00:32 AM »
nice plug, but why is so black outside on thread?

My bike after re-jetting and with 50:1 mix still gets spooge, a lot actually.
I guess I try again 60:1 now.

If its got a lot of spooge maybe look at the flashpoint of the oil your using
Try a lower flashpoint oil so the engine hasnt got a huge amount of unburnt oil floating through the exhaust