I bought the cheaper of the 2 and it works but the strobe isn't all that powerful but it does work.
I am still obsessing over the timing hole marks....
My bike has the this for the advanced timing mark :
_
Z
The mark on my timing hole is on the lower left hand side.
Do I adjust for the mark on my case to the line above Z or between the line and the Z or centered on the Z?
Also which plug wire... snowbum says it doesnt matter but the left is more convenient the manual say the right hand I tried both and there is a difference.
I went with the right hand but now my valve noise seems to be louder?
I use a high-dollar Sun xenon timing light and the light ain't too bright either. Plus, cables get in the light beam and my eyes aren't far enough apart to see around 'em.::)Usually, I'll close the shop overhead door, leaving it just cracked so I don't off myself, and get a slightly better image from the timing light.
At approx 3500 rpm, the ignition should be fully advanced and the horizontal mark above Z should be centered in the hole. At idle rpm, the S mark should be centered in the hole. If S is low in the hole, the timing is retarded. S high, too advanced.
I use the right-hand plug lead for timing, per the manual. A good fan blowing straight on the front end of the engine helps prevent overheating it you dawdle too long.
When you're happy with the timing, and the BMW accepts quite of bit of tolerance, let the engine cool and re-check valve lash.
