Vintage Dirt Bike Q & A

Hi,
I popped a DG swingarm on my ol' ME360 and while checking for clearances with 17.5" travel shocks, I noticed that on the clutch-side center case has so little clearance a pebble could get between the swingarm and the case and cause havoc. It would act just like a nutcracker, except the left case would end up being the crackee.
Can I ask anyone that has a DG swingarm to let me know what their clearance is like at full shock extension? It may be an accumulation of mounting hole tolerances on my bike, I dunno? I know that I ain't runnin' the arm on this bike, maybe one of my '79s will show different results.

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1978 CR250R
1979 CR250R
1980 CR250R
1980 ME360
1986 CR250R