My U20 had about 6 of those thin washers between the crank and the gear.
I had my crank reground, and the mains I recieved were OS thrust. ( I had to
fit them the crank )
I used the washers to aline the crank and jackshaft gears.
Phil
Fred_Katz@ci.sf.ca.us wrote:
> My U20 has two of those paper thin washers behind the chain sprocket. Does
> anyone have the clearance measurements between the crank front main face
> (block face) and chain sprocket, for determining how many washers are
> needed? I can't find any published information.
>
> Fred - So.SF
>
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