Hi,
I agree with Oldguy,
Never mix castor oil with other oils unless you want instant sludge clogging everything up. Why use castor oil, is it for the aroma? Modern two stroke oils are made to stand much higher stress levels than in a much lower revving Scott engine. My bike gets quite a belting at times, no smoke and has never had lubrication problems since I bought it 1997.
Regards,
Bob Mather.
