I used mostly K1 to K6 parts including swingarm, sprocket carrier, etc .
from front F2 motorwith original output shaft , with 530 sprocket fitted.
Carrier, I heated it up and wound the studs out around 10mm. , then used 4 spacers out of say 1 inch round, 10 mm long
Now sprocket is no longer centered on shoulder, I intend to machine shoulder and fit a sleeve.
Had to grind a hole in the swingarm. And use 1/4 spacer on axle, which now means you cant get a cotter pin into end of axle.....and it became so hard getting thespacer in, i finally jacked the swingarm open another 1/4 inch.
of course no chain guard known to man, beast , or priest will now fit.
If you have cash..I did not.. I think an offset sprocket , reversed would take care of it al,..