Can anyone tell me how to check just the midrange jetting?After I make a run to full throttle and check the plug,it's running lean.Can a person check just the mid-range and then the top?
I'm 'bout 1000',runnin' a 170 main,45 pilot and 2 1/2 out on the screw.Full Ti Yosh pipe with the lid off.Any help would be appreciated.

Oh,it's a YFZ.

 

http://www.motocross.com/motoprof/mo...lug2/plug2.htm

http://www.gnttype.org/techarea/engine/plugs.html

http://www.strappe.com/plugs.html

http://www.nightrider.com/biketech/spkplghnbook.htm

http://www.hioutput.com/tech/plug.html

http://www.victorylibrary.com/mopar/plug-read.htm

http://www.cyclewerksracing.com/reading_spark_plugs.htm

http://www.splitfire.com/plugtips.htm

http://www.ngksparkplugs.com/techinf...31000&country=

http://performanceunlimited.com/illu...parkplugs.html

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JETTING

http://www.speedandsport.com/jet.html

http://www.dynojet.com/motorjet.shtml

 

Anyone got any other info while I look through these links?

 

you will need to adjust the jet needle