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OAP Ted's CB400F2 rebuild - engine not run for about 12 years.

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Oddjob:
I just turn it to TDC on each cylinder as it closes the valves. So it's 2 more movements, so what, it's not like it's hard work.

McCabe-Thiele (Ted):

--- Quote from: Oddjob on February 07, 2022, 10:41:28 PM ---I just turn it to TDC on each cylinder as it closes the valves. So it's 2 more movements, so what, it's not like it's hard work.

--- End quote ---

So Ken am I understanding you right  if I say when  number 1 cylinder is at TDC with the inlet valve having just closed then both inlet & exhuast can then be set on number 1 cylinder then repeat for remaining cylinders?

On the old A series BL engines I would get number 1 cylinder with the inlet valve fully open on the camshaft then there would be a corresponding (exhuast?) valve on number 4 cylinder that was fully closed. It is a long time ago it was a firing order thing.

K2-K6:
Likewise, along time since I've done A or B series. Chugging through distant memories seems to bring the total of 9 up. Valves numbered 1 and 2 for first cylinder etc, and so with 1 down (valve open) then adjust #8 making 9 then so on with 2 down, adjust 7 until completely done with each pair adding up to 9.

Every four cylinder is the same though (except for Yamaha R1 that has offset crankshaft like half a V8) with all of the routine however you do it as applicable across them.

Bryanj:
NO TED,
When the exhaust closes and inlet opens on No 1 tdc(called on the rock), adjust No4, then rotate crank 1 turn to tdc again  and do No1
To save any confusion at all i then do the same with 2&3

Oddjob:
Bryan has explained it Ted.

Get all the tappet covers off, as the mark approaches 1-4 TDC or T watch the valves on number 1 and number 4 cylinders, one of them will have both valves going down/up, the other will have them both up, the one with both up is the one to do. If you grab a tappet adjuster you can rattle the one on compression stroke, if it's number 1 (and it's a 50/50 chance of it being that) then after doing the tappets turn the crank (clockwise, always clockwise) then as 2-3 T mark comes up you do number 2 cylinder, turn again to 1-4 and do number 4 and lastly turn again to 2-3 T and do number 3 cylinder. The firing order is 1-2-4-3.

I always do the tappets with the plugs out, Bryan always says DON'T use the big nut to turn the crank with, however that is how Honda tell you to do it, if the plugs are out it's not a problem and TBH how else are you going to turn the crank, yes you can use the kickstart BUT it's a real pain and it's very imprecise especially if your doing the timing that way, you could of course remove the generator cover BUT that's a big job, usually means a new gasket and chances the electrical connectors getting disturbed, no one in the trade would do that, especially if your doing timing, you need to rock the crank and watch the points open and you can't do that with the rotor, it's on the wrong end of the crank.

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