Top End Rebuild

Not to be an ***, but if you don't know how to find TDC for the piston? You might consider getting help from a mechanic with knowledge of Husaberg engines? When Husaberg designed there engine it was designed for the common guy to work on in there garage. There motto was when I started working at a dealer was "if it doesn't need it we don't put it in the motorcycle"

It's a both way ...I want to say for myself it can be hard somentime to give suggestion as you don't know the other person background or experience...

I am in work now it will post an easy answer...TDC is at compression stroke there is only one TDC TDC marks are at the rotor on the elettric side (right side engine case)

Print the manual https://www.manualslib.com/products/Husaberg-Fs-650-E-6-4083877.html

There are quite a few video online searching ktm rfs engine rebuild to give you some advice (rfs and husaberg are quite similar)

Dan, just make sure the piston is all the way up, at the top of the cylinder. Turn the engine over by hand--clock wise on the right side of the engine--. Take a straw or something similar and poke it down the spark plug hole a couple inches. Turn the engine over slowly. You will feel the piston touch the straw and begin to push it back out of the hole. When it stops pushing, you are at Top Dead Center, or TDC. You should be close to the TDC timing marks on the flywheel (or rotor) and engine case--line them up. Now, line up the timing marks of the camshaft, with the lobes either pointing directly up or down. I think I've read that Husaberg states they should be up but I've always set them up pointing down on other four-stroke singles I've built over the years.
It may take a few tries to get it right as it may look right when you put the cam chain on but then you install the tensioner and it's suddenly retarded a tooth or two.

Hope this helps some.

Bruce

Down is fine. That's how I prefer to time it.
When the lobes are down, you are at the top of the compression stroke, when they are up, you are at the end of the exhaust stroke. Either way, the piston is at TDC.
Don't overthink this. All you are doing is phasing in the camshaft position relative to the crankshaft position. Up or down will work. Trust me.

Don't overthink this. All you are doing is phasing in the camshaft position relative to the crankshaft position. Up or down will work.

Click to expand...

...and when you align the dots, you are just syncing the counterbalancer to the crank.