progress: setting the timing

The manual says the number of pins between the arrow labeled 3 on the exhaust camshaft sprocket, and the arrow labeled 2 on the intake camshaft sprocket, needs to be 20 inclusive. Adjust the crankshaft so the T tick mark (not the R tick mark) lines up to the guide tick in the stator window. Set the chain, count the pins three times (then count them backwards), then torque down the camshaft cap bolts in diagonal sequence to 70-100 inch-lbs. Then don't touch anything till the tensioner goes in - more on that later.

FWIW, according to Paul the rule of thumb in setting timing is to make sure the camshaft lobes on one side or the other are diametrically opposed: either facing each other or facing away from each other; but it is necessary to reference the manual for your specific motor. There are also rectangular notches machined in the ends of the camshaft to help with this.

A five-year-old could put a Suzuki motorcycle engine together. I could seriously give my little brother the book and some tools and tell him "here, build this".