Speed Buggy,
Not so fast – you have some more investigating to do.
Clearly ramps, chains and sprockets are in order.
First, measure the cam timing and confirm the cams have not ‘jumped’ time.
Next, measure the cylinder leakage to confirm the valves, rings and heads seal properly (check head stud nuts).
The
big issue is if the sprockets or other on the lay shaft (jackshaft) inside the crankcase are damaged.
Carefully set the cams at some known point and back-off the valve adjusters or remove the rocker arms so the valves cannot hit the pistons.
Remove the cam sprockets, tensioners, idlers, ramps and split-off the chains.
Remove the chain housings.
You can now turn the crankshaft without risk of the pistons contacting any open valves.
As you turn the crankshaft, carefully inspect the sprockets on the jackshaft for damage.
Remove the cover on the end of the jackshaft. Measure for excess jackshaft end play.
This should tell you if you need to do other than replace the chains (with split-link chains), replace the sprockets and ramps, rebuild the tensioners and reassemble with new gaskets and O-rings.
The good news is you found this before there was other consequential damage, like
this.
Best,
Grady