Thanks guys for the feed back, none of my buddies have a 300ex so unable to look at and compare. What little info I've picked up appears to lead towards 300ex. Funny thing is my buddy doesn't remember where it came from either, had it for sometime now picking up dust....
"HJ"
84 YT60
85 350x (423cc) with 81 XL500 head conversion
83 XR500 (628cc) converted 3 Wheel hybrid
73 CB750 K3 converted 3 Wheel hybrid
86 TRX250R chassis XR650L engine hybrid
89 TRX250R (stock )
90 LT500 Quadzilla
85 FL350 Odysses ( water cooled head )
Lost (sold) but not forgotten 80 ATC 110 (205cc on alcohol ) 83 200x ( 222cc ) 83 200x ( 185s eng ) 85 350x ( stock )
added to the collection recently, (2) '70 US90 Aquarius Blue and '74 ATC90 Daytona Orange