After rejetting 127.5/40/#4 washer, I have a very lean running cylinder, that gets HOT quick.  While the other cylinder runs normal, not nearly as hot.  Lean side has white plug, cooler side has brown to black plug.  I've check the float heights with the U-tube method, both are the same.  Air mixture screws are set at 2 1/2 turns out.  Bike ran lean (normal) before rejetting.  Any ideas on what could cause the cylinders to run at extremely different temperatures? :x

Sucking air ?? and check the aux ground as well ...
Cool.
Srinath.

deff something amiss, be it carb sucking air, or carb boot