Mounting a timing wheel on a 750SF?

Long ago I bought a Volkswagen with similar behaviour: max speed 75 miles or so, and no rev. under load. Before taking of the cylinderhead I noticed that the camshaft timing was off by two teeth (belt was replaced by the previous owner). After correction the old Volks was another car.
Did you check the timing (or am I into the bleeding obvious?)
 
Heavy vibration was mentioned earlier, could it be vibrating so badly that fuel is frothing in the float bowls? Just an idea for debate.
 
Thanks guys, all the timing has checked out, including cam timing/strobe timing/engine case to flywheel marks. I,ve found a reputable machinist to evaluate the cylinder wear marks and check for trueness this coming week. I think the lack of engine performance is a combination of things I,m gradually fixing.
Thanks to all the help from this Forum!
 
Rob,
Due to the engine's lack of power and vibration, I haven't reved it past 5K RPM since the motor doesn't respond at all past that and falls flat.
A local machinist/engine builder inspected the cylinders w/ a bore dial gauge and says the bores are out of true in the center and the various scratches and wear marks along the entire cylinder bore are too deep for honing and need reboring for .5 over pistons. I'm also having the cylinder head inspected and so far the cam lobes are smooth.
 
Thank you Rob,
The engine revs freely in neutral w/ no stumbles or flat spots, and starts instantly w/ an even idle/no backfiring or smoking. But under load at speeds over 40 the motor pukes out and takes awhile to reach 50-60. I've done everything I can think of, so hopefully the re-boring w/ new pistons will help. The piston top grooves for the rings was worn over tolerance, and I'm also having the valve head assembly checked.
 
I had a similar thing on a BMW I used to own and it was dirty filters in the petrol tank. The float height is pretty crucial on those dellortos too.
 
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