(Another) TS250 timing question

[NVA250]

Evening all,

I'm making slow and plodding progress with my TS250 restoration (viewtopic.php?f=5&t=9001) but I am nowhere near where I would like to be with it. Life gets in the way...

I wonder if someone can give me some advice regarding timing? The engine is the old 4 speed type with the finned head and angled spark plug hold which has complicated matters a little. I have worked out and marked off TDC, but all of the manuals that I have (original MZ and Haynes) give the BTDC timing settings in cm/mm measured through the spark plug hole or using the MZ gauge on the flat head supa 5 engine. Can anyone tell me what the correct timing should be in degrees if I'm measuring it using a 360 compass attached to the crank?

I think that it may be 21° or 22° BTDC but I cannot find anything / anywhere confirming this.

Any help would be greatly appreciated as the timing is my big stumbling block at the moment!

Thanks T

[Guesi]

22" 15` is the right timing.

[Blurredman]

How easy is it to whip the head off and adjust thusly?

[Puffs]

Good point.
If it has the same stroke as the ETZ250, 22° 15` = 22.25° = about 3mm bTDC; see download/file.php?id=4847

[NVA250]

Super, thanks for the swift answers. I was considering taking the head off, but it's a fair bit of hassle rather than just working out (or knowing) the degrees