Setting up timing on gn, gs, rv 125

[The Artist]

My GS 125 needs the timing setting up and I have no idea how to.

Anyone got a manual or know where the marks are?

At the moment it turns over with loads of compression and then huge backfire. Is the came 90 degrees or 180 degrees out or what?

Please help asap.

Thanks

[hmmmnz]

right,
1,
set the bike to tdc.
to do this you need to remove the little cap on the side of the crank case, and the one directly below it (to turn the crank)
turn the crank over by hand untill in the top hole you see the timing mark
it will be marked with a " T| " the | will match up with a little notch in the top of the hole, you bike is now at top dead center,

2.
setting the cam in the right position.
get the cam and place it in the head with the lobes facing down (if its a rocker arm system) and the 2 - - marks on the cam sprocket running parallel to the angle of the head or the line of the holder that the cam sits in,
put the chain in place and release the tensionor
that bottom mark T| and the 2 - - marks should be still in the same place.

if the cam moved when you released the tensionor, the slip it back a tooth and try again,

once you are confident every thing is lined up, put the cam caps in place and bolt up the head,
then turn the bike over by hand from the crank, it should hit anything.

when you have done that, check the clearances on the rocker arms and adjust them.
and you are good to go,

have fun
____________________
the humans are dead
I kick arse for the lord
Wiring Diagrams BIDNIP it bitches

[hmmmnz]

i have a gn125 manual in french, (where the images are from)
and a rv125 (which is a 2 stroke so not really any use to you)
the gn manual is
here
____________________
the humans are dead
I kick arse for the lord
Wiring Diagrams BIDNIP it bitches

[smegballs]

[The Artist]

Well we managed to get it in the end.

The cam shaft in this engine has no such markings. Pictures soon in GBC.

[hmmmnz]

[The Artist]

[hmmmnz]

[molex]

some information for you too

[unitynotsocri...]

oldies but goldies
____________________
nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS

[N cee thirty]

[The Artist]

I vaguely remember this. I think CHRI5 came over and we took the head off the engine for some reason.

[unitynotsocri...]

Soz for redigging an old post, I have a few probs and don't know how to link things for the lad with the gs.
____________________
nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS