Need jetting help 97 Blaster & please define "Plug Chop"

[Randall Olshove]

Just got a 97 Yamaha YFS 200 Blaster, have to replace carburetor (new). Seems to be stock engine but has DG expansion and silencer. At 700ft and premix fuel mainly summer temps, avg 70-90". Probably stay with stock air box. Please define "Plug Chop". New carb apparently comes with stock jets. Is it even necessary to rejet for the DG exhaust?

 

[bummer981]

The DG pipe usually does not require a jetting change. Premixing your fuel does.

Search for information on plug chop.

Plug chopping gives you an idea of how rich or lean you are running on fuel/air.

 

[Randall Olshove]

The DG pipe usually does not require a jetting change. Premixing your fuel does.

Search for information on plug chop.

Plug chopping gives you an idea of how rich or lean you are running on fuel/air.

Ok, I did, and understand it now. I will have to do it before I know where I stand with the new carb. Thanks