you all get the same treatment, old, young, widowed, divorced, fat, thin, male, female, retards, geniuses, 80000post count, 10post count.....the rules aren't hidden.
i don't believe that and certainly hope that's not the case....
......i think most people are nursing alcohol/drug/sugar/in-laws/etc comedowns/hangovers....
if the motor is in true and the rear wheel is centred, i would take the front sprocket off and pull out the spacer that is sat on the sprocket output shaft (the front sprocket butts up against it) measure it. you can then determine if this is the 'trouble'
well with you having a similar set up on the other bike..... also depends on what rear make 180 you're using, because ive ran 180 rears on slabby 750s with no mods to the front sprockets close but not touching
if its an oil boiler motor and a slingy rear wheel you don't need an offset front sprocket....but you may need to notch the frame ( especially if you're using string )
i notched the frame on my et, blandit/gsxr/turbo, slingy 5.5 rearwheel/sprocket carrier, spondon arm....and i use a length of alloy angle for chain run, string for my tomato plants