SOHC.co.uk Forums > CB350/400

Checking the valve timing on a 400.

(1/5) > >>

McCabe-Thiele (Ted):
Whilst working on my timing this afternoon I briefly got confused with where TDC is I started to use the 1-4 double mark on the right instead of the "T" on the far left.

That got me thinking if I could have made a similar mistake when I fitted the camshaft in place - I probably did not but I am concerned enough to need to double check.

Is it possible to check the valve timing without having to remove the top cover?

Bryanj:
Yes Ted, remove the tappet caps from the cylinder by the timing marks and rock the engine backwards and forwards over the T mark whilst observing the rocker arms, on one tdc they will not move(compression stroke) on the other (one turn of crank=1/2 turn of cam) the rockers will each move up and down an equal amount ( exhaust stroke tdc)


Hope that makrs sense

McCabe-Thiele (Ted):
Perfectly thanks Bryan.

McCabe-Thiele (Ted):
Well despite feeling crap I decided to check if my valve timing is as it should be.
Firsty with number 1 cylinder on Tdc I moved the engine forwards and backwards over the T mark neither moved. I then rotated the engine a half turn (2-3 T mark) I only observed movement on number 1 exhuast - number one inlet did not move.

Looks like I've messed up Bryan so I will need to get it sorted groan........it was going so well.

Bryanj:
NO you dont check on 2/3 you both checks on 1/4 one at tdc comp one at tdc exhaust
You should move the CRANK one full turn which moves the CAM 1/2 turn

Navigation

[0] Message Index

[#] Next page