Originally Posted by Transporterman99
On early single cylinder Yamaha bikes (as far as I remember!) you altered the points gap to advance/retard the ign timing but on yours you probably need to loosen and turn the whole plate (affecting both cylinders) making the fault less likely to be timing.
Make sure the points gap is to spec before checking the timing of course..
Thanks again for the gauge, top notch
The timing is set on no.1 cylinder (top 1), slacken off the timing plate, set the points gap to 0.35mm or 14 > 16 thou. once gapped rotate the flywheel untill the piston is 3.35mm or 0.132thou BTDC (you need a dial gauge) at that point the points should just be breaking contact, you get this bang on by rotating the base plate, you really need a meter, but the trusty 'fag paper' is just as good (IMO) when you are happy without moving anything tighten up the base plate, then all you have to do is set the points for no.2 cylinder (bottom) so rotate the flywheel untill no.2 cylinder is 3.35mm or 0.132thou BTDC at this point again the points should just be breaking contact if not you set these up by adjusting the points gap only, so it does not matter what the gap is just that it is breaking contact.
Now my head hurts, hope that makes sense