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Cam lobe position and tappet adjustment

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Fogdevil:
Just wondering if you could help me get something straight in my head.
I have just timed the camshaft (T1-4 marks correspond,cam sprocket lines parallel with top of barrel,cylinder 4 cam lobes pointing down)
Next job is to fit the head and adjust tappets.
According to the manual you first adjust cylinder 1 tappets at TDC with valves shut. BUT if I leave the camshaft in the same position(as above) the cam lobes are pointing up therefore valves are open.
SO-do I have to rotate crank until cylinder 1 TDC and lobes face down.If so,why does workshop manual(p20) show you cylinder 4 with lobes in down position for timing purposes?
OR-do I adjust tappets at cylinder 4 first and do it the opposite way to the manual
Am I overthinking this?

Nurse Julie:
This nay help you as I couldn't make sense of it either so K2-6 (Nigel) enlightened me when I built my engine.


The camshaft positioning (up or down lobes) is not important. With the crank set at T for cylinders 1 and 4, both of these are at tdc. Camshaft one way will give firing on one cylinder and exhaust on the other,  then flip the cam 180 degrees without moving the crank, and the sequence just flips cylinders with it. As they are both sparked at the same point it makes no difference which way you build it.

But there again the above may confuse issues even more
 ::)

Fraccie:
Out of interest and to satisfy my curiosity, if you are sat on the bike, which is number one cylinder,left outer or right outer?

Nurse Julie:

--- Quote from: Fraccie on April 24, 2018, 04:45:50 PM ---Out of interest and to satisfy my curiosity, if you are sat on the bike, which is number one cylinder,left outer or right outer?

--- End quote ---
As your sitting on the bike No 1 is to your left, or the nearside. No 4 is to your right, or the offside.

Fraccie:
Thanks for the clarification Julie.

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