which way does the advance governor / contact breaker 'sleeve' go?

[angrypants]

hi guys, searched and searched for this to no avail, so hoping for some help
1978 gs400c
i was about to set my points and realised there was lots of red dust in there from the PO , anyways figured id pull it all out, clean, lube and checkout the mech advance mechanism.
when checking how that worked i took the sleeve of the centre of the ?? axel part ?? and didn't note which way it went .. it can go two ways , 180 deg difference , there is a notch near the lump/ thick side of the shaft -which i thought would point to something to realign but seems there is mark to line up both ways
the assembly is 33120-4401, i cannot figure it out looking at fische and the clymer manual i have says nothing about it, google has been no help, no pictures found either, im so nagry as i was hoping to ride around the block for the first time tonight ... if i have the markings on the plate for the left / #1 cylinder at the top as in the pic , the raised or thicker side of the sleeve would be at 7 or 2 on the clock. im thinking it should be at 8pm

i think i could have just tried it each way and started the bike but i was having trouble setting the points to even do that (user error i was doing it wrong) and ran out of time tonight


hoping someone might know so which way it goes so i can get straight into setting the points and a ride tomorrow after work

pics attached the thickest raised / lump part is left of the red arrow.. much more obvious in real life than the pic

thanks
grant

[leftlostcommonsense]

I'm not too sure about points. My guess is that line you pointed to in the pic is the trigger side, the side that tells the points to fire coils. When you put the back part of the assembly back on (it should only go on one way and line up right with the notch on your engine behind the advancer) if the L side is what's showing upwards in the window where you see your timing marks that line should be pointed to the left opposite if the R side is what is showing to be the cylinder firing. It's always easier to set number 1 cylinder to top dead center (the T mark on L side) before removing the advancer so you know exactly where your engine is sitting in order to reassemble. Whichever cylinder is up is the side that line in the pic needs to be pointing to.

Sorry if my explanation didn't help and in the case I'm completely wrong please disregard this whole post and someone be sure to ridicule me for being so ignorant lol.

[angrypants]

Thanks mate
Will give that theory a go tonight
cheers
grant

[angrypants]

yep that makes sense to me now i thinking clearly this morning ...the spark would be required just after top dead centre on the compression stroke on L ...so the trigger lump but lol should be before the heal on the L side when L is at TDC??
is that right?
so find TDC for L and then whack it all back together ?

thanks

grant

[leftlostcommonsense]

Well, the spark comes before TDC, that's what the F line is for. That's for idle and the other line way before the F and T marks is the fully advanced firing line. Just whichever side is up when you put the advance unit back on is whichever direction that line on the rotor should be pointing. L is up it should be pointing left if R is up it should be pointing right.

[angrypants]

got it.... i think

thanks i'll let you know how i go

[angrypants]

leftlostcommonsensei got stuck in late last night got it all back together on the basis of the above and set the point gap and went to do the static timing etc... then realised it was 180 out ... so i pulled it all apart and turned the sleeve around and went ahead by the time id finished i couldn't test as it was near 2 am and i'm in an apartment block car park..... but sitting in my office i'm thinking i was right the first time.... i'll find out over the weekend when i can next get to it.
fun and games

[angrypants]

All good up and running
was right the first time - dam self doubt
had to do it all over again - least I got practice on how to set the gaps and static timing - 4 times in a fortnight
thanks for your advice the trigger goes on the left when the left timing marks are at the top
cheers
grant

[leftlostcommonsense]

Glad you got it going. Now all you need is a dyna S and won't ever have to open that case again except to see timing marks for work on the top end lol

[angrypants]

yeah been looking at those .. it's on the list but a little way down, just before selling the timing light lol