Yeah not a 4000 and no way 8 YO! More like 18. However it turns out that the troubles are minor and the wqorst thing may be a $130 clutch driver cone. The drive clutches are sup[posed to be no more than one shop rule's thickness from the cone and they must be 1/2"! Am going to deglaze and adjust the clitch plates and cone and see what happens.
The chain adjuster is just a spring....I may even have lost it working here, with lots of large gumnuts (marrti "honky nuts") to jam up the works. If it happens again I will have to create a guard. That means I will definiteky have to get that )*&(@W*& wheel off.
Nick