grandpaul wrote:Ludwig, how familiar are you with the Norton, Matchless & AJS Hybrids?
about 200000 km ? (half with a rebalanced 850 engine )
The hybrids had the oil feed on top of the head , not on the side , and had concave pistons .
Doing maintenance work on the primary is a real nightmare : remove both exhausts , footrests , brake pedal , all these screws , disconnecting alternator ,making a new seal ...
So you want everything in there top notch .
One of the weak points are the 3 cheese head screws holding the inner primary case .
They tend to come loose , making the stator rest on the rotor , plus loosing engine oil .
Because your cases are apart , you could consider installing at least one trough bolt , with a flat head from the inside .
I never got the Atlas clutch to work troublefree : sticking , slipping ...so I replaced it very soon with a Commando clutch .
( with hindsight , this could have been because I overfilled the primary )
This also requires a Commando main shaft .
But with a double row chain instead of triplex .
I used Mercedes camshaft chains ( renolds) , of wich I had plenty .
Locked the gearbox in a fixed position and did away with the tensioner .
Chain too slack = new chain .
Real oil seal in inner primary behind clutch to keep the oil in .
Because the Commando cluth has no cush drive , i aslo use a Commando rear hub .
Now it 's belt drive .
(This is a bike that can keep you busy ! )