SOHC.co.uk Forums > CB350/400

Adjusting points/contact breakers driving me insane!

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K2-K6:

--- Quote from: JezzaPeach on April 30, 2021, 07:05:40 AM ---Good point, or take a plug out and compare the piston position with the T mark on the plate.

--- End quote ---

I think the marks stay the same as pegged to crank position,  but just the cam lobe moving as it rotates independent of the other parts.

In effect it looks ok from initial inspection but the cam itself is 180 out from marks. 

To swap it you have to swing the counter weights out of the way and swivel the cam then re-establish the weights.

There's some good pictures on here of the units with align check marks but I can't immediately find them.

Bryanj:
Its the fact the plate is a smaller circle than the hole formed by the posts,
On a really bad one i made 3 bent curved shims held by yhe screws that hold the plate and bend round the edge of the plate to remove any play, there are other ways and any that work without damage are OK

JezzaPeach:
This pic shows one type

K2-K6:
That's the one,  the two little white squares reference the lobe position and can be installed either correctly or 180 out, putting all the timing at BBDC rather than BTDC .

billdn:

--- Quote from: K2-K6 on April 30, 2021, 06:18:34 PM ---That's the one,  the two little white squares reference the lobe position and can be installed either correctly or 180 out, putting all the timing at BBDC rather than BTDC .

--- End quote ---

Like the thought but my one has it with the mark in the vicinity of 2-3 mark and a new (not OEM) on DS site shows it also on the 2-3 side , possible succinctly different on the 500/4 and 550/4?

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