Camshaft Timing Arrangement

[lmari]

Hello and Merry Christmas!

I have a 1979 GS1000 that I am doing a top end rebuild to. When I starting taking things apart, I counted the number of pins and it was set to 19. In reading the maintenance manual for a 1980 GS1000, it said the timing should be set to 20 pins (see attached).

Should I leave it at 19 or set to 20?

Thanks!!

[Nessism]

20 pins.

What kind of manual is that? If it's aftermarket be sure to get the factory manual from Cliff's website. http://zeus.mtsac.edu/~cliff/storage...S-L_Manual.pdf

[hampshirehog]

If you have 451 intake cam and a 49S sprockets its 19 pins but that would mean you had a ST top end.

[lmari]

Hi, thanks for the comments!

Can you elaborate a little bit on how I can find out if I have a 451 intake can and what that means? Same for the ST top end?

thanks!

[hampshirehog]

The numbers are written on the cam sprockets. It's the sprockets that are numbered like this, not the cams - I can see my original post was unclear.